Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2023.03.030
Amir Alizadeh DDS , Prajakta Kulkarni BDS, MS, MSD , Darshanjit Pannu DDS , Jimmy Londono DDS
Dentin sensitivity is a common complaint from patients during and after tooth preparation for complete coverage restorations. Techniques to reduce sensitivity during tooth preparation include immediate dentin sealing and application of desensitizers. However, managing dentin sensitivity during complete mouth rehabilitation on natural teeth can be challenging, especially for patients with dentin hypersensitivity. A technique to protect the prepared teeth during complete mouth rehabilitation using polytetrafluoroethylene (PTFE) tape is described.
{"title":"Polytetrafluoroethylene tape to combat tooth sensitivity during complete mouth rehabilitation","authors":"Amir Alizadeh DDS , Prajakta Kulkarni BDS, MS, MSD , Darshanjit Pannu DDS , Jimmy Londono DDS","doi":"10.1016/j.prosdent.2023.03.030","DOIUrl":"10.1016/j.prosdent.2023.03.030","url":null,"abstract":"<div><div><span>Dentin sensitivity<span> is a common complaint from patients during and after tooth preparation<span> for complete coverage restorations. Techniques to reduce sensitivity during tooth preparation include immediate dentin sealing and application of desensitizers. However, managing dentin sensitivity during complete mouth rehabilitation on natural teeth can be challenging, especially for patients with </span></span></span>dentin hypersensitivity<span>. A technique to protect the prepared teeth during complete mouth rehabilitation using polytetrafluoroethylene (PTFE) tape is described.</span></div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 357-359"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9498996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2024.03.006
Rachael Y. Jablonski BDS, MFDS RCS(Ed), PhD , Taran Malhotra MSc, MIMPT , Daniel Shaw MIMPT , Trevor J. Coward PhD, MPhil, FIMPT, FETC , Farag Shuweihdi PhD , Chris Bojke BA(hons) MSc, PhD , Sue H. Pavitt BSc, PhD , Brian R. Nattress BChD, PhD, MRDRCS(Ed), FDSRCS(Ed), FDTF(Ed) , Andrew J. Keeling BSc, BDS, MFGDP, PhD
Statement of problem
Manually sculpting a wax pattern of a facial prosthesis is a time-, skill-, and resource-intensive process. Computer-aided design (CAD) methods have been proposed as a substitute for manual sculpting, but these techniques can still require high technical or artistic abilities. Three-dimensional morphable models (3DMMs) could semi-automate facial prosthesis CAD. Systematic comparisons of different design approaches are needed.
Purpose
The purpose of this study was to compare the trueness and repeatability of replacing facial features with 3 methods of facial prosthesis design involving 3DMM, traditional CAD, and conventional manual sculpting techniques.
Material and methods
Fifteen participants without facial defects were scanned with a structured light scanner. The facial meshes were manipulated to generate artificial orbital, nasal, or combined defects. Three methods of facial prosthesis design were compared for the 15 participants and repeated to produce 5 of each design for 2 participants. For the 3DMM approach, the Leeds face model informed the designs in a statistically meaningful way. For the traditional CAD methods, designs were created by using mirroring techniques or from a nose model database. For the conventional manual sculpting techniques, wax patterns were manually created on 3D printed full face baseplates. For analysis, the unedited facial feature was the standard. The unsigned distance was calculated from each of the several thousand vertices on the unedited facial feature to the closest point on the external surface of the prosthesis prototype. The mean absolute error was calculated, and a Friedman test was performed (α=.05).
Results
The median mean absolute error was 1.13 mm for the 3DMM group, 1.54 mm for the traditional CAD group, and 1.49 mm for the manual sculpting group, with no statistically significant differences among groups (P=.549). Boxplots showed substantial differences in the distribution of mean absolute error among groups, with the 3DMM group showing the greatest consistency. The 3DMM approach produced repeat designs with the lowest coefficient of variation.
Conclusions
The 3DMM approach shows potential as a semi-automated method of CAD. Further clinical research is planned to explore the 3DMM approach in a feasibility trial.
{"title":"Comparison of trueness and repeatability of facial prosthesis design using a 3D morphable model approach, traditional computer-aided design methods, and conventional manual sculpting techniques","authors":"Rachael Y. Jablonski BDS, MFDS RCS(Ed), PhD , Taran Malhotra MSc, MIMPT , Daniel Shaw MIMPT , Trevor J. Coward PhD, MPhil, FIMPT, FETC , Farag Shuweihdi PhD , Chris Bojke BA(hons) MSc, PhD , Sue H. Pavitt BSc, PhD , Brian R. Nattress BChD, PhD, MRDRCS(Ed), FDSRCS(Ed), FDTF(Ed) , Andrew J. Keeling BSc, BDS, MFGDP, PhD","doi":"10.1016/j.prosdent.2024.03.006","DOIUrl":"10.1016/j.prosdent.2024.03.006","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Manually sculpting a wax pattern of a facial prosthesis is a time-, skill-, and resource-intensive process. Computer-aided design (CAD) methods have been proposed as a substitute for manual sculpting, but these techniques can still require high technical or artistic abilities. Three-dimensional morphable models (3DMMs) could semi-automate facial prosthesis CAD. Systematic comparisons of different design approaches are needed.</div></div><div><h3>Purpose</h3><div>The purpose of this study was to compare the trueness and repeatability of replacing facial features with 3 methods of facial prosthesis design involving 3DMM, traditional CAD, and conventional manual sculpting techniques.</div></div><div><h3>Material and methods</h3><div>Fifteen participants without facial defects were scanned with a structured light scanner. The facial meshes were manipulated to generate artificial orbital, nasal, or combined defects. Three methods of facial prosthesis design were compared for the 15 participants and repeated to produce 5 of each design for 2 participants. For the 3DMM approach, the Leeds face model informed the designs in a statistically meaningful way. For the traditional CAD methods, designs were created by using mirroring techniques or from a nose model database. For the conventional manual sculpting techniques, wax patterns were manually created on 3D printed full face baseplates. For analysis, the unedited facial feature was the standard. The unsigned distance was calculated from each of the several thousand vertices on the unedited facial feature to the closest point on the external surface of the prosthesis prototype. The mean absolute error was calculated, and a Friedman test was performed (α=.05).</div></div><div><h3>Results</h3><div>The median mean absolute error was 1.13 mm for the 3DMM group, 1.54 mm for the traditional CAD group, and 1.49 mm for the manual sculpting group, with no statistically significant differences among groups (<em>P</em>=.549). Boxplots showed substantial differences in the distribution of mean absolute error among groups, with the 3DMM group showing the greatest consistency. The 3DMM approach produced repeat designs with the lowest coefficient of variation.</div></div><div><h3>Conclusions</h3><div>The 3DMM approach shows potential as a semi-automated method of CAD. Further clinical research is planned to explore the 3DMM approach in a feasibility trial.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 598-607"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140707569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2024.02.022
Rui Chen DDS, MS , Jialin Xu DDS, PhD , Shuang Wang DDS, MS , Siyi Duan DDS, MS , Zijian Wang DDS, MS , Xiaodong Zhang DDS, PhD , Yulong Tang DDS, PhD
Statement of problem
A defective socket is common after tooth extraction in the esthetic zone, but whether an implant can be immediately placed in a defective socket is unclear.
Purpose
The purpose of this systematic review and meta-analysis was to summarize relevant studies within the last 20 years on implant survival and changes in soft and hard tissues after immediate implant placement in esthetic areas with socket defects.
Material and methods
A search was conducted for the relevant studies in the PubMed/Medline, the Cochrane Library, Web of Science, and Embase databases from January 2000 to March 2022. The literature review, data retrieval, and judgment whether the included studies had a risk of bias were handled independently by 2 reviewers, and a single-arm meta-analysis was performed using a statistical software program.
Results
A total of 23 studies evaluating the immediate implant placement of 630 implants (9 studies without a flap and 14 studies with a flap) were included. A 98.1% implant survival rate (95% confidence interval (CI): 96.2%, 100.0%) was determined. Marginal bone loss (MBL) at 6, 12, and ≥24 months were 1.03 mm (95%CI: 1.02, 1.03), 0.72 mm (0.72, 0.73), and 1.15 mm (1.14, 1.16). Gingival recession at 12 months was 0.25 mm (95%CI: 0.17, 0.33). The pink esthetic score (PES) were 12.34 (95%CI: 12.16, 12.52) at 12 months and 12.58 (12.39, 12.76) at ≥24 months.
Conclusions
Current evidence shows that immediate implant placement into defective sockets in esthetic areas is feasible. Immediate implant placement can have a relatively good therapeutic effect in terms of implant survival rate, MBL, gingival recession, and PES.
{"title":"Effectiveness of immediate implant placement into defective sockets in the esthetic zone: A systematic review and meta-analysis","authors":"Rui Chen DDS, MS , Jialin Xu DDS, PhD , Shuang Wang DDS, MS , Siyi Duan DDS, MS , Zijian Wang DDS, MS , Xiaodong Zhang DDS, PhD , Yulong Tang DDS, PhD","doi":"10.1016/j.prosdent.2024.02.022","DOIUrl":"10.1016/j.prosdent.2024.02.022","url":null,"abstract":"<div><h3>Statement of problem</h3><div>A defective socket is common after tooth extraction in the esthetic zone, but whether an implant can be immediately placed in a defective socket is unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this systematic review and meta-analysis was to summarize relevant studies within the last 20 years on implant survival and changes in soft and hard tissues after immediate implant placement in esthetic areas with socket defects.</div></div><div><h3>Material and methods</h3><div>A search was conducted for the relevant studies in the PubMed/Medline, the Cochrane Library, Web of Science, and Embase databases from January 2000 to March 2022. The literature review, data retrieval, and judgment whether the included studies had a risk of bias were handled independently by 2 reviewers, and a single-arm meta-analysis was performed using a statistical software program.</div></div><div><h3>Results</h3><div>A total of 23 studies evaluating the immediate implant placement of 630 implants (9 studies without a flap and 14 studies with a flap) were included. A 98.1% implant survival rate (95% confidence interval (CI): 96.2%, 100.0%) was determined. Marginal bone loss (MBL) at 6, 12, and ≥24 months were 1.03 mm (95%CI: 1.02, 1.03), 0.72 mm (0.72, 0.73), and 1.15 mm (1.14, 1.16). Gingival recession at 12 months was 0.25 mm (95%CI: 0.17, 0.33). The pink esthetic score (PES) were 12.34 (95%CI: 12.16, 12.52) at 12 months and 12.58 (12.39, 12.76) at ≥24 months.</div></div><div><h3>Conclusions</h3><div>Current evidence shows that immediate implant placement into defective sockets in esthetic areas is feasible. Immediate implant placement can have a relatively good therapeutic effect in terms of implant survival rate, MBL, gingival recession, and PES.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 411-426"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140140412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
<div><h3>Statement of problem</h3><div>A trial restoration is an important diagnostic tool that can be fabricated through analog or digital pathways. Digital workflows may have improved accuracy, but this is yet to be demonstrated conclusively.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the dimensional accuracy of trial restorations produced by different analog (molded) and digital (milled and 3D printed) methods. Parameters studied included fabrication methods, Shore-A hardness of silicone putty indices, length of span, and labial tooth levels.</div></div><div><h3>Material and methods</h3><div>Digital additive trial restorations were designed on a single virtual cast from maxillary right to left lateral incisor teeth (4 teeth) and from maxillary right to left first premolar teeth (8 teeth). Both designs were identical on the 4 anterior teeth. Each digital trial restoration was 3-dimensionally (3D) printed to produce reference casts. The original cast was 3D printed to produce 44 replica casts. There were 8 experimental groups (4 analog and 4 digital) with 10 specimens each. For the analog groups, 20 silicone indices per reference cast were made: 10 from standard silicone putty (63 to 70 Shore-A hardness) and 10 from hard silicone putty (90 Shore-A hardness). The analog trial restorations were molded on replica casts with silicone indices and bis-acryl resin. The digital trial restorations were either milled or 3D printed and adapted onto replica casts. Each trial restoration was scanned and digitally superimposed onto respective scanned reference casts. Measurements were recorded at 3 levels: cervical, middle, and incisal. The independent samples Kruskal-Wallis, 2-sample Mann-Whitney, and Bonferroni tests were used to compare the distribution of accuracy among all groups (α=.05).</div></div><div><h3>Results</h3><div>The dimensional accuracy of the different trial restoration fabrication methods was comparable in terms of median values of trueness (how close the readings were to the reference), and no statistically significant difference was found among them (<em>P</em>>.05). When the dimensional accuracy in terms of precision (how close the readings were to each other) were analyzed, the hard putty groups demonstrated a statistically significant better outcome, whereas standard putty consistently showed the poorest result. The incisal level displayed the most significant deviation (<em>P</em>=.005) when all groups were compared. The incisal discrepancy values of the short-span standard putty trial restoration varied by as much as 0.84 mm in some specimens.</div></div><div><h3>Conclusions</h3><div>Milled and 3D printed trial restoration fabrication techniques showed dimensional accuracy comparable with that of the analog groups. However, the choice of silicone putty was shown to affect the dimensional accuracy of an analog molded trial restoration. A high Shore-A hardness silicone putty produced the
{"title":"Comparisons of analog and digital methods to produce an accurate trial restoration","authors":"Yun-Shan Koh BDS, MClinDent, M Pros , Noland Naidoo BChD, PDD, MDent , Haralampos Petridis DDS, MS, Cert Prosthodont, PhD, FHEA","doi":"10.1016/j.prosdent.2024.02.012","DOIUrl":"10.1016/j.prosdent.2024.02.012","url":null,"abstract":"<div><h3>Statement of problem</h3><div>A trial restoration is an important diagnostic tool that can be fabricated through analog or digital pathways. Digital workflows may have improved accuracy, but this is yet to be demonstrated conclusively.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the dimensional accuracy of trial restorations produced by different analog (molded) and digital (milled and 3D printed) methods. Parameters studied included fabrication methods, Shore-A hardness of silicone putty indices, length of span, and labial tooth levels.</div></div><div><h3>Material and methods</h3><div>Digital additive trial restorations were designed on a single virtual cast from maxillary right to left lateral incisor teeth (4 teeth) and from maxillary right to left first premolar teeth (8 teeth). Both designs were identical on the 4 anterior teeth. Each digital trial restoration was 3-dimensionally (3D) printed to produce reference casts. The original cast was 3D printed to produce 44 replica casts. There were 8 experimental groups (4 analog and 4 digital) with 10 specimens each. For the analog groups, 20 silicone indices per reference cast were made: 10 from standard silicone putty (63 to 70 Shore-A hardness) and 10 from hard silicone putty (90 Shore-A hardness). The analog trial restorations were molded on replica casts with silicone indices and bis-acryl resin. The digital trial restorations were either milled or 3D printed and adapted onto replica casts. Each trial restoration was scanned and digitally superimposed onto respective scanned reference casts. Measurements were recorded at 3 levels: cervical, middle, and incisal. The independent samples Kruskal-Wallis, 2-sample Mann-Whitney, and Bonferroni tests were used to compare the distribution of accuracy among all groups (α=.05).</div></div><div><h3>Results</h3><div>The dimensional accuracy of the different trial restoration fabrication methods was comparable in terms of median values of trueness (how close the readings were to the reference), and no statistically significant difference was found among them (<em>P</em>>.05). When the dimensional accuracy in terms of precision (how close the readings were to each other) were analyzed, the hard putty groups demonstrated a statistically significant better outcome, whereas standard putty consistently showed the poorest result. The incisal level displayed the most significant deviation (<em>P</em>=.005) when all groups were compared. The incisal discrepancy values of the short-span standard putty trial restoration varied by as much as 0.84 mm in some specimens.</div></div><div><h3>Conclusions</h3><div>Milled and 3D printed trial restoration fabrication techniques showed dimensional accuracy comparable with that of the analog groups. However, the choice of silicone putty was shown to affect the dimensional accuracy of an analog molded trial restoration. A high Shore-A hardness silicone putty produced the ","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 513-522"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140119884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2024.10.039
Hyun-Tae Kim DDS , Gülce Çakmak DDS, PhD , Ye-Hyeon Jo BS, MS , Eun-Byeol Jee CDT, MS , Jun-Ho Cho DDS, PhD , Hyung-In Yoon DDS, PhD , Burak Yilmaz DDS, PhD
Statement of problem
Additive manufacturing (AM) and subtractive manufacturing (SM) have been widely used for fabricating resin-based fixed dental prostheses. However, studies on the effects of material type (AM or SM resin) and surface finishing (polishing or glazing) on the surface properties and biofilm formation are lacking.
Purpose
The purpose of this in vitro study was to investigate the effects of material type and surface finishing on the surface roughness, wettability, protein adsorption, and microbial adhesion of the AM and SM resins marketed for fixed restorations under artificial saliva-aged conditions.
Material and methods
Disk-shaped specimens (∅10×2 mm) were fabricated using 3 types of resins: AM composite resin with fillers (AMC), AM resin without fillers (AMU), and SM composite resin with fillers (SMC). Each resin group was divided into 2 subgroups based on surface finishing: polished (P) and glazed (G). Therefore, 3 polished surface groups (AMCP, AMUP, and SMCP) and 3 glazed surface groups (AMCG, AMUG, and SMCG) were prepared. Specimens were then categorized according to aging condition in artificial saliva. Surface roughness (Ra and Sa), contact angle, surface free energy (SFE), protein adsorption, and microbial adhesion were measured. The data were analyzed using a nonparametric factorial analysis of variances and post hoc tests with Bonferroni correction (α=.05).
Results
When nonaged, significant interactions between material type and surface finishing were detected for Ra, contact angle, SFE, protein adsorption, and microbial adhesion (P≤.008). AMCP showed higher Ra and microbial adhesion than AMUP and SMCP, and higher contact angle and protein adsorption than SMCP (P<.001). AMCG had lower SFE than AMUG (P=.005) and higher bacterial adhesion than SMCG (P<.001). AMC had higher Sa than AMU and SMC (P≤.006). When aged, significant interactions between material type and surface finishing were detected for Ra, Sa, protein adsorption, and microbial adhesion (P≤.026). The contact angle and SFE were significantly affected only by the material type (P≤.001), as AMC exhibited higher wettability than SMC (P≤.004). AMCP had higher Ra and microbial adhesion than AMUP and SMCP (P≤.003). AMCP had higher Sa and protein adsorption than SMCP (P≤.004). AMCG showed lower Ra and higher protein adsorption than AMUG (P≤.001).
Conclusions
Both material type and surface finishing significantly affected surface properties and biofilm formation. AMCP exhibited higher surface roughness, protein adsorption, and microbial adhesion compared with SMCP. Glazing may reduce the differences in surface-biofilm interactions between AMC and SMC.
问题陈述：增材制造（AM）和减材制造（SM）已被广泛用于制造树脂基固定义齿。目的：本体外研究的目的是调查材料类型和表面处理对人工唾液老化条件下市场上用于固定修复体的 AM 和 SM 树脂的表面粗糙度、润湿性、蛋白质吸附性和微生物粘附性的影响：使用 3 种树脂制作盘状试样（∅10×2 毫米）：含填料的 AM 复合树脂（AMC）、不含填料的 AM 树脂（AMU）和含填料的 SM 复合树脂（SMC）。每组树脂根据表面处理分为两个子组：抛光组（P）和釉面组（G）。因此，制备了 3 个抛光表面组（AMCP、AMUP 和 SMCP）和 3 个上釉表面组（AMCG、AMUG 和 SMCG）。然后根据人工唾液中的老化情况对试样进行分类。对表面粗糙度（Ra 和 Sa）、接触角、表面自由能（SFE）、蛋白质吸附性和微生物粘附性进行了测量。数据采用非参数因子方差分析和Bonferroni校正后检验（α=.05）进行分析：在未老化的情况下，材料类型和表面处理对 Ra、接触角、SFE、蛋白质吸附和微生物附着力有明显的交互作用（P≤.008）。AMCP 的 Ra 值和微生物附着力高于 AMUP 和 SMCP，接触角和蛋白质吸附力高于 SMCP（PConclusions：材料类型和表面处理对表面特性和生物膜的形成都有很大影响。与 SMCP 相比，AMCP 表现出更高的表面粗糙度、蛋白质吸附性和微生物粘附性。上釉可减少 AMC 和 SMC 表面与生物膜相互作用的差异。
{"title":"Surface properties and biofilm formation on resins for subtractively and additively manufactured fixed dental prostheses aged in artificial saliva: Effect of material type and surface finishing","authors":"Hyun-Tae Kim DDS , Gülce Çakmak DDS, PhD , Ye-Hyeon Jo BS, MS , Eun-Byeol Jee CDT, MS , Jun-Ho Cho DDS, PhD , Hyung-In Yoon DDS, PhD , Burak Yilmaz DDS, PhD","doi":"10.1016/j.prosdent.2024.10.039","DOIUrl":"10.1016/j.prosdent.2024.10.039","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Additive manufacturing (AM) and subtractive manufacturing (SM) have been widely used for fabricating resin-based fixed dental prostheses. However, studies on the effects of material type (AM or SM resin) and surface finishing (polishing or glazing) on the surface properties and biofilm formation are lacking.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to investigate the effects of material type and surface finishing on the surface roughness, wettability, protein adsorption, and microbial adhesion of the AM and SM resins marketed for fixed restorations under artificial saliva-aged conditions.</div></div><div><h3>Material and methods</h3><div>Disk-shaped specimens (∅10×2 mm) were fabricated using 3 types of resins: AM composite resin with fillers (AMC), AM resin without fillers (AMU), and SM composite resin with fillers (SMC). Each resin group was divided into 2 subgroups based on surface finishing: polished (P) and glazed (G). Therefore, 3 polished surface groups (AMCP, AMUP, and SMCP) and 3 glazed surface groups (AMCG, AMUG, and SMCG) were prepared. Specimens were then categorized according to aging condition in artificial saliva. Surface roughness (Ra and Sa), contact angle, surface free energy (SFE), protein adsorption, and microbial adhesion were measured. The data were analyzed using a nonparametric factorial analysis of variances and post hoc tests with Bonferroni correction (α=.05).</div></div><div><h3>Results</h3><div>When nonaged, significant interactions between material type and surface finishing were detected for Ra, contact angle, SFE, protein adsorption, and microbial adhesion (<em>P</em>≤.008). AMCP showed higher Ra and microbial adhesion than AMUP and SMCP, and higher contact angle and protein adsorption than SMCP (<em>P</em><.001). AMCG had lower SFE than AMUG (<em>P</em>=.005) and higher bacterial adhesion than SMCG (<em>P</em><.001). AMC had higher Sa than AMU and SMC (<em>P</em>≤.006). When aged, significant interactions between material type and surface finishing were detected for Ra, Sa, protein adsorption, and microbial adhesion (<em>P</em>≤.026). The contact angle and SFE were significantly affected only by the material type (<em>P</em>≤.001), as AMC exhibited higher wettability than SMC (<em>P</em>≤.004). AMCP had higher Ra and microbial adhesion than AMUP and SMCP (<em>P</em>≤.003). AMCP had higher Sa and protein adsorption than SMCP (<em>P</em>≤.004). AMCG showed lower Ra and higher protein adsorption than AMUG (<em>P</em>≤.001).</div></div><div><h3>Conclusions</h3><div>Both material type and surface finishing significantly affected surface properties and biofilm formation. AMCP exhibited higher surface roughness, protein adsorption, and microbial adhesion compared with SMCP. Glazing may reduce the differences in surface-biofilm interactions between AMC and SMC.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 594.e1-594.e9"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142686943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2023.07.011
Hanqi Gao DDS, PhD , Xiaoqiang Liu DDS, PhD , Ti Zhou DDS , Jianguo Tan DDS, PhD
Statement of problem
An accurate digital workflow for transferring the interocclusal relationship from complete arch diagnostic interim restorations to complete arch tooth preparations is essential in complete mouth rehabilitation. However, research on the accuracy of digital cross-mounting methods is lacking.
Purpose
The purpose of this in vitro study was to compare the trueness of 4 sectional-cast digital cross-mounting methods in transferring the interocclusal relationship for complete mouth rehabilitation.
Material and methods
Maxillary and mandibular anatomic typodonts were used to build complete arch tooth preparations and diagnostic interim restorations for complete mouth rehabilitation in vitro. Four sectional casts were designed: an anterior cast (AR), a posterior cast (PO), a unilateral cast (UL), and a tripod cast (TR). Both extraoral scanning (EOS) and intraoral scanning (IOS) were used to obtain intermediate digital sectional casts, which were cross-registered with diagnostic interim restorations and definitive casts to transfer the interocclusal relationship. Trueness was determined by assessing tooth distance deviation and mandibular 3-dimensional (3D) deviation. Differences among the 4 sectional-cast methods were analyzed with the Kruskal-Wallis test, and differences between the 2 scanning methods were analyzed with the Mann-Whitney U test (α=.05).
Results
Significant differences in the trueness of interocclusal relationship transfer were observed among the 4 sectional-cast methods (P<.05). Regarding tooth overall distance deviation, TR-EOS found no statistically significant difference compared with PO-EOS (P>.05), but TR-EOS had half the overall distance deviation of PO-EOS. Both TR-EOS and PO-EOS had smaller deviations than the AR-EOS and UL-EOS groups (P<.05). TR-IOS had a smaller distance deviation than the AR-IOS, PO-IOS, and UL-IOS groups (P<.05). The overall distance deviation of EOS was significantly smaller than that of IOS in the TR and PO groups (P<.05). Regarding mandibular 3D deviation, TR-EOS found no statistically significant difference but had half the root mean square (RMS) of 3D deviation compared with the PO-EOS groups (P>.05). Both TR-EOS and PO-EOS groups had a smaller RMS than the AR-EOS and groups (P<.05). The TR-IOS group had a smaller RMS than the AR-IOS, PO-IOS, and UL-IOS groups (P<.05). The 3D deviation of EOS was significantly smaller than that of IOS in the PO group (P<.05).
Conclusions
Both EOS and IOS with the tripod sectional-cast digital method accurately transferred the interocclusal relationship for complete mouth rehabilitation.
{"title":"Trueness of 4 sectional-cast digital methods for transferring the interocclusal relationship in complete mouth rehabilitation","authors":"Hanqi Gao DDS, PhD , Xiaoqiang Liu DDS, PhD , Ti Zhou DDS , Jianguo Tan DDS, PhD","doi":"10.1016/j.prosdent.2023.07.011","DOIUrl":"10.1016/j.prosdent.2023.07.011","url":null,"abstract":"<div><h3>Statement of problem</h3><div>An accurate digital workflow for transferring the interocclusal relationship from complete arch diagnostic interim restorations to complete arch tooth preparations<span> is essential in complete mouth rehabilitation. However, research on the accuracy of digital cross-mounting methods is lacking.</span></div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the trueness of 4 sectional-cast digital cross-mounting methods in transferring the interocclusal relationship for complete mouth rehabilitation.</div></div><div><h3>Material and methods</h3><div>Maxillary and mandibular anatomic typodonts were used to build complete arch tooth preparations and diagnostic interim restorations for complete mouth rehabilitation in vitro. Four sectional casts were designed: an anterior cast (AR), a posterior cast (PO), a unilateral cast (UL), and a tripod cast (TR). Both extraoral scanning (EOS) and intraoral scanning (IOS) were used to obtain intermediate digital sectional casts, which were cross-registered with diagnostic interim restorations and definitive casts to transfer the interocclusal relationship. Trueness was determined by assessing tooth distance deviation and mandibular 3-dimensional (3D) deviation. Differences among the 4 sectional-cast methods were analyzed with the Kruskal-Wallis test, and differences between the 2 scanning methods were analyzed with the Mann-Whitney U test (α=.05).</div></div><div><h3>Results</h3><div>Significant differences in the trueness of interocclusal relationship transfer were observed among the 4 sectional-cast methods (<em>P</em><.05). Regarding tooth overall distance deviation, TR-EOS found no statistically significant difference compared with PO-EOS (<em>P</em>>.05), but TR-EOS had half the overall distance deviation of PO-EOS. Both TR-EOS and PO-EOS had smaller deviations than the AR-EOS and UL-EOS groups (<em>P</em><.05). TR-IOS had a smaller distance deviation than the AR-IOS, PO-IOS, and UL-IOS groups (<em>P</em><.05). The overall distance deviation of EOS was significantly smaller than that of IOS in the TR and PO groups (<em>P</em><.05). Regarding mandibular 3D deviation, TR-EOS found no statistically significant difference but had half the root mean square (RMS) of 3D deviation compared with the PO-EOS groups (<em>P</em>>.05). Both TR-EOS and PO-EOS groups had a smaller RMS than the AR-EOS and groups (<em>P</em><.05). The TR-IOS group had a smaller RMS than the AR-IOS, PO-IOS, and UL-IOS groups (<em>P</em><.05). The 3D deviation of EOS was significantly smaller than that of IOS in the PO group (<em>P</em><.05).</div></div><div><h3>Conclusions</h3><div>Both EOS and IOS with the tripod sectional-cast digital method accurately transferred the interocclusal relationship for complete mouth rehabilitation.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 575.e1-575.e10"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10215532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2024.03.028
Taseef Hasan Farook BDS, MScDent , James Dudley BDS, DClinDent
Statement of problem
Whether the use of an external graphics processing unit (eGPU) and a handheld computer prolongs the operation time for 3-dimensional (3D) intraoral scanning or produces clinically unacceptable scans is unclear.
Purpose
The purpose of this in vitro study was to compare the 3D intraoral scan accuracy and scan time of a small portable device and an eGPU with desktop-grade workstations.
Material and methods
A handheld computer, a laptop, a desktop workstation, and an external graphics card were used to scan a 3D printed set of maxillary and mandibular casts 10 consecutive times using an intraoral scanner. The casts were provided by the manufacturers of the scanner, and the scanning process was conducted by a single operator following best-practice methods. The time required to scan and process the 3D models was analyzed via 1-way ANOVA. Dimensional similarity was assessed using the Hausdorff distance (HD) across the resultant 80 independent bimaxillary 3D scans. A dental desktop 3D scanner was used to scan the casts which served as the control reference. HD values were analyzed via multifactorial ANOVA (α=.05).
Results
In the real-time rendering of 3D intraoral scans, the laptop without an eGPU took significantly longer (146.41 ±10.66 seconds) (F=30.58, P<.001) compared with when connected to an eGPU (117.66 ±6.95 seconds) and handheld computer (114.84 ±7.20 seconds). Postprocessing times were more favorable on the desktop workstation (16.61 ±4.18 seconds) compared with the laptop with (27.85 ±8.89 seconds) and without an eGPU (32.37 ±7.16 seconds) connected, with the handheld computer and eGPU combination (14.66 ±7.37 seconds) producing the best results (F=14.60, P<.001). Dimensional similarity assessments showed high consistency (F=0.92, P=.44), with no discrepancies noted on the prepared tooth surfaces. The handheld minicomputer with an eGPU produced the best results across all 4 groups.
Conclusions
The handheld computer with an eGPU offered 3D intraoral scans comparable with output from a traditional workstation while preserving the details on the tooth preparations but at significantly faster scanning and processing rates.
{"title":"A comparison of a handheld minicomputer and an external graphics processing unit in performing 3D intraoral scans","authors":"Taseef Hasan Farook BDS, MScDent , James Dudley BDS, DClinDent","doi":"10.1016/j.prosdent.2024.03.028","DOIUrl":"10.1016/j.prosdent.2024.03.028","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Whether the use of an external graphics processing unit (eGPU) and a handheld computer prolongs the operation time for 3-dimensional (3D) intraoral scanning or produces clinically unacceptable scans is unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the 3D intraoral scan accuracy and scan time of a small portable device and an eGPU with desktop-grade workstations.</div></div><div><h3>Material and methods</h3><div>A handheld computer, a laptop, a desktop workstation, and an external graphics card were used to scan a 3D printed set of maxillary and mandibular casts 10 consecutive times using an intraoral scanner. The casts were provided by the manufacturers of the scanner, and the scanning process was conducted by a single operator following best-practice methods. The time required to scan and process the 3D models was analyzed via 1-way ANOVA. Dimensional similarity was assessed using the Hausdorff distance (HD) across the resultant 80 independent bimaxillary 3D scans. A dental desktop 3D scanner was used to scan the casts which served as the control reference. HD values were analyzed via multifactorial ANOVA (α=.05).</div></div><div><h3>Results</h3><div>In the real-time rendering of 3D intraoral scans, the laptop without an eGPU took significantly longer (146.41 ±10.66 seconds) (F=30.58, <em>P</em><.001) compared with when connected to an eGPU (117.66 ±6.95 seconds) and handheld computer (114.84 ±7.20 seconds). Postprocessing times were more favorable on the desktop workstation (16.61 ±4.18 seconds) compared with the laptop with (27.85 ±8.89 seconds) and without an eGPU (32.37 ±7.16 seconds) connected, with the handheld computer and eGPU combination (14.66 ±7.37 seconds) producing the best results (F=14.60, <em>P</em><.001). Dimensional similarity assessments showed high consistency (F=0.92, <em>P</em>=.44), with no discrepancies noted on the prepared tooth surfaces. The handheld minicomputer with an eGPU produced the best results across all 4 groups.</div></div><div><h3>Conclusions</h3><div>The handheld computer with an eGPU offered 3D intraoral scans comparable with output from a traditional workstation while preserving the details on the tooth preparations but at significantly faster scanning and processing rates.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 568-574"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140775909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Denture stomatitis (DS) is a common oral disorder in patients with complete maxillary dentures. Typical treatments such as nystatin or azoles lead to drug resistance after a long period. Several studies have shown the antifungal activity of statins against Candida albicans; however, studies on the antifungal effect of atorvastatin against DS are lacking.
Purpose
The purpose of this randomized, double-blind controlled trial was to assess the effectiveness of atorvastatin mouthwash against DS.
Material and methods
Twenty-two participants diagnosed with DS were randomly allocated into 2 groups: 11 in the intervention group (atorvastatin mouthwash) and 11 in the control group (nystatin). Participants were asked to use the mouthwash 3 times a day for 2 weeks. The length and width of the lesions were measured, and the number of colonies were counted on days 1 and 14. Data were analyzed with the Spearman correlation coefficient and the Mann-Whitney, Kruskal Wallis, and Wilcoxon tests (α=.05).
Results
The number of colonies before and after using a mouthwash was significantly different in the control and intervention groups (P=.005 and P=.003, respectively). The number of colonies in the 2 groups were statistically similar on the first day (P=.809). However, a significant difference was observed between the groups on day 14 (P=.024). The number of colonies in the atorvastatin group decreased more than nystatin, indicating that atorvastatin was more effective. A significant difference among the groups was found in terms of Candida species detected after the intervention (P=.032).
Conclusions
Atorvastatin was effective in reducing Candida species in participants with DS and can be used as an antifungal agent in treating DS.
{"title":"Investigating the effectiveness of atorvastatin mouthwash on denture stomatitis: A randomized, double-blind controlled trial","authors":"Iman Haghani PhD , Majid Saeedi PhD , Amirhossein Babaei PhD , Zahra Yahyazadeh PhD , Abolfazl Hosseinnataj PhD , Mohammad Ebrahimi Saravi DDS, PhD , Fatemeh Akbari DDS , Anahita Lotfizadeh DDS , Ehsan Rajabi Visroodi PhD , Tahereh Molania DDS, PhD","doi":"10.1016/j.prosdent.2024.12.003","DOIUrl":"10.1016/j.prosdent.2024.12.003","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Denture stomatitis (DS) is a common oral disorder in patients with complete maxillary dentures. Typical treatments such as nystatin or azoles lead to drug resistance after a long period. Several studies have shown the antifungal activity of statins against <em>Candida albicans</em>; however, studies on the antifungal effect of atorvastatin against DS are lacking.</div></div><div><h3>Purpose</h3><div>The purpose of this randomized, double-blind controlled trial was to assess the effectiveness of atorvastatin mouthwash against DS.</div></div><div><h3>Material and methods</h3><div>Twenty-two participants diagnosed with DS were randomly allocated into 2 groups: 11 in the intervention group (atorvastatin mouthwash) and 11 in the control group (nystatin). Participants were asked to use the mouthwash 3 times a day for 2 weeks. The length and width of the lesions were measured, and the number of colonies were counted on days 1 and 14. Data were analyzed with the Spearman correlation coefficient and the Mann-Whitney, Kruskal Wallis, and Wilcoxon tests (α=.05).</div></div><div><h3>Results</h3><div>The number of colonies before and after using a mouthwash was significantly different in the control and intervention groups (<em>P</em>=.005 and <em>P</em>=.003, respectively). The number of colonies in the 2 groups were statistically similar on the first day (<em>P</em>=.809). However, a significant difference was observed between the groups on day 14 (<em>P</em>=.024). The number of colonies in the atorvastatin group decreased more than nystatin, indicating that atorvastatin was more effective. A significant difference among the groups was found in terms of <em>Candida</em> species detected after the intervention (<em>P</em>=.032).</div></div><div><h3>Conclusions</h3><div>Atorvastatin was effective in reducing <em>Candida</em> species in participants with DS and can be used as an antifungal agent in treating DS.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 481.e1-481.e8"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142895507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/S0022-3913(25)00016-2
{"title":"Sponsoring Organizations and Liaisons","authors":"","doi":"10.1016/S0022-3913(25)00016-2","DOIUrl":"10.1016/S0022-3913(25)00016-2","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Page A2"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.prosdent.2024.12.023
Edoardo Mancuso, Annamaria Forte, Tatjana Maravic, Claudia Mazzitelli, Allegra Comba, Andrea Baldi, Vincent Fehmer, Irena Sailer, Nicola Scotti, Annalisa Mazzoni, Prof Lorenzo Breschi
Statement of problem: The effects of different finish line designs on the seating accuracy of partial indirect restorations are unclear.
Purpose: The purpose of this in vitro study was to evaluate the influence of different preparation designs on the marginal and internal discrepancy of lithium disilicate computer-aided design and computer-aided manufacture (CAD-CAM) partial indirect restorations before and after thermomechanical aging by using 3-dimensional (3D) microcomputed tomography (μCT).
Material and methods: Forty human molars were divided according to the preparation design and their location relative to the tooth survey line: SO: rounded shoulder occlusal to the survey line; CO: chamfer occlusal to the survey line; SA: rounded shoulder apical to the survey line; CA: chamfer apical to the survey line (n=10). Ceramic onlays were luted using a universal resin cement (RelyX Universal + Scotchbond Universal Plus). The specimens underwent thermomechanical loading in a mastication simulator (1 200 000 mechanical and 5000 thermal cycles). The marginal and internal discrepancy was evaluated with μCT before and after aging. The volume of cement and internal voids was evaluated with 3-dimensional imaging. The marginal discrepancy (MD), absolute marginal discrepancy (AMD), axial gap (AG), and occlusal gap (OG) were quantified using 2-dimensional analyses. Data were statistically analyzed using a 2-way ANOVA and the Tukey post hoc test (α=.05).
Results: Preparation designs apical to the survey line resulted in a larger volume of cement compared with those occlusal to the survey line (P<.05). No differences were observed in the internal voids among the groups immediately or after aging (P>.05). Both preparation designs and aging had a significant influence on the MD, AMD, AG, and OG (P<.05). Specifically, CB exhibited significantly greater values for AMD, MD, AG, and OG compared with all other preparations (P<.05). CA and SA performed significantly worse than CO and SO in terms of AMD and MD (P<.005).
Conclusions: Preparations located occlusal to the survey line, particularly CO, demonstrated superior results with respect to both marginal and internal adaptations. CA exhibited the least favorable adaptation among the preparations investigated. Aging had a detrimental impact on the marginal adaptation of the restorations, regardless of the specific preparation design used.
{"title":"Effects of preparation design on the marginal and internal fit of CAD-CAM overlay restorations: A µCT evaluation.","authors":"Edoardo Mancuso, Annamaria Forte, Tatjana Maravic, Claudia Mazzitelli, Allegra Comba, Andrea Baldi, Vincent Fehmer, Irena Sailer, Nicola Scotti, Annalisa Mazzoni, Prof Lorenzo Breschi","doi":"10.1016/j.prosdent.2024.12.023","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.023","url":null,"abstract":"<p><strong>Statement of problem: </strong>The effects of different finish line designs on the seating accuracy of partial indirect restorations are unclear.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the influence of different preparation designs on the marginal and internal discrepancy of lithium disilicate computer-aided design and computer-aided manufacture (CAD-CAM) partial indirect restorations before and after thermomechanical aging by using 3-dimensional (3D) microcomputed tomography (μCT).</p><p><strong>Material and methods: </strong>Forty human molars were divided according to the preparation design and their location relative to the tooth survey line: SO: rounded shoulder occlusal to the survey line; CO: chamfer occlusal to the survey line; SA: rounded shoulder apical to the survey line; CA: chamfer apical to the survey line (n=10). Ceramic onlays were luted using a universal resin cement (RelyX Universal + Scotchbond Universal Plus). The specimens underwent thermomechanical loading in a mastication simulator (1 200 000 mechanical and 5000 thermal cycles). The marginal and internal discrepancy was evaluated with μCT before and after aging. The volume of cement and internal voids was evaluated with 3-dimensional imaging. The marginal discrepancy (MD), absolute marginal discrepancy (AMD), axial gap (AG), and occlusal gap (OG) were quantified using 2-dimensional analyses. Data were statistically analyzed using a 2-way ANOVA and the Tukey post hoc test (α=.05).</p><p><strong>Results: </strong>Preparation designs apical to the survey line resulted in a larger volume of cement compared with those occlusal to the survey line (P<.05). No differences were observed in the internal voids among the groups immediately or after aging (P>.05). Both preparation designs and aging had a significant influence on the MD, AMD, AG, and OG (P<.05). Specifically, CB exhibited significantly greater values for AMD, MD, AG, and OG compared with all other preparations (P<.05). CA and SA performed significantly worse than CO and SO in terms of AMD and MD (P<.005).</p><p><strong>Conclusions: </strong>Preparations located occlusal to the survey line, particularly CO, demonstrated superior results with respect to both marginal and internal adaptations. CA exhibited the least favorable adaptation among the preparations investigated. Aging had a detrimental impact on the marginal adaptation of the restorations, regardless of the specific preparation design used.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143080371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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