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Optimal Hydrofluoric Acid Etching Duration and Impact of Silane/Adhesive on Profilometric Properties and Bonding to Lithium Disilicate Glass Ceramics. 氢氟酸蚀刻的最佳持续时间以及硅烷/粘合剂对轮廓特性和二硅酸锂玻璃陶瓷粘合的影响。
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-01 DOI: 10.2341/24-015-L
T S Porto, A J Faddoul, S J Park, V P Feitosa, T F Eyüboğlu, M Ozcan

Objectives: This study aimed to assess the surface roughness, surface free energy (SFE), and shear bond strength (SBS) on a lithium disilicate glass-ceramic surface following varying etching protocols (time variation) and application of silane either with or without adhesive material.

Methods and materials: Lithium disilicate glassceramic (LDGC) computer-aided design and computer-aided manufacture (CAD/CAM) blocks were cut using a slow-speed cutting mechanism. CAD/CAM blocks were then evaluated for surface roughness, 6 groups (n=20); SFE,12 groups (n=5); and SBS, 10 groups (n=10). The cut CAD/CAM blocks were randomly allocated to 28 groups. Groups were based on the following: 30 or 90 seconds of etching with 9% hydrofluoric acid (HF); application or absence of silane coupling agent (Sil); and application or absence of adhesive (Adh).The control group (Cont) had untreated surfaces. Unetched surfaces were surveyed with only silane (Sil), only adhesive (Adh), or silane+adhesive (SilAdh). Further etched groups were HF30 with HF for 30 seconds, HF30-Sil, HF30-Adh, and HF30-SilAdh. Alternative 90-second etching times produced similar groups: HF90, HF90-Sil, HF90-Adh, and HF90-SilAdh. A digital profilometer was used to assess the surface roughness of specimens, and two readings were recorded. Sessile drop analysis was used to examine SFE specimens, and the OWRK model was modified to measure liquid surface tension. A universal testing machine (UltraTester, Ultradent Products, Inc, South Jordan, UT, USA) was utilized for the SBS test, with the crosshead speed set at 0.5 mm/min until failure. Representative treated specimens from each group were submitted to surface morphological evaluation and chemical analysis using scanning electron microscopy/energy dispersive x-ray spectroscopy (SEM/EDXS) (n=3). After data collection, evaluation using one- or two-way analysis of variance and the post-hoc Tukey test (α=5%) was conducted.

Results: A longer etching time of 90 seconds produced a rougher surface. After the 90-second etching process, SFE displayed the greatest values; nevertheless, the use of silane did not affect SFE. For every group examined, the application of silane followed by adhesive resulted in an increase in SBS and more stable bonding over time. SEM/EDXS showed that etching times did affect the amount of cerium on the surface and altered surface morphology.

Conclusions: Higher and more consistent bond strengths have been observed with longer etching periods. Silane and adhesive application on the ceramic surface showed stronger and enhanced bond strength, specifically when longer etching times were employed.

研究目的本研究旨在评估二硅酸锂玻璃陶瓷表面在不同的蚀刻方案(时间变化)和使用硅烷(含或不含粘合剂材料)后的表面粗糙度、表面自由能(SFE)和剪切粘接强度(SBS):使用慢速切割装置切割二硅酸锂玻璃陶瓷(LDGC)计算机辅助设计和计算机辅助制造(CAD/CAM)砌块。然后对 6 组(n=20)CAD/CAM 块、12 组(n=5)SFE 和 10 组(n=10)SBS 进行表面粗糙度评估。切割后的 CAD/CAM 块被随机分配到 28 个组。分组依据如下:对照组(Cont)表面未经处理。对照组(Cont)的表面未经处理。未蚀刻组的表面只使用了硅烷(Sil)、粘合剂(Adh)或硅烷+粘合剂(SilAdh)。进一步蚀刻的组别为 HF30(含高频 30 秒)、HF30-Sil、HF30-Adh 和 HF30-SilAdh。其他 90 秒的蚀刻时间也产生了类似的组别:HF90、HF90-Sil、HF90-Adh 和 HF90-SilAdh。使用数字轮廓仪评估试样的表面粗糙度,并记录两个读数。使用无水滴分析来检测 SFE 试样,并对 OWRK 模型进行了修改,以测量液体表面张力。SBS 测试使用万能测试机(UltraTester,Ultradent Products, Inc,South Jordan, UT,USA),十字头速度设定为 0.5 毫米/分钟,直至失效。使用扫描电子显微镜/能量色散 X 射线光谱(SEM/EDXS)对每组具有代表性的处理试样进行表面形态评估和化学分析(n=3)。数据收集后,使用单因子或双因子方差分析和事后 Tukey 检验(α=5%)进行评估:结果:90 秒的蚀刻时间越长,表面越粗糙。在 90 秒的蚀刻过程后,SFE 值最大;然而,硅烷的使用并不影响 SFE 值。对每组受检样品而言,使用硅烷后再使用粘合剂都会增加 SBS 值,而且随着时间的推移,粘合也会更加稳定。SEM/EDXS 显示,蚀刻时间确实会影响表面的铈含量并改变表面形态:结论:蚀刻时间越长,粘接强度越高、越稳定。硅烷和粘合剂在陶瓷表面的应用显示出更强和更高的粘合强度,特别是在采用较长的蚀刻时间时。
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引用次数: 0
Influence of Battery Levels in Cordless LED Light-curing Units on Properties of Resin Cement and Glass Fiber Post Retention. 无绳 LED 光固化装置中的电池电量对树脂水泥和玻璃纤维柱固着性能的影响。
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-01 DOI: 10.2341/23-125-L
T D Segatto, K K Dolenkei, P Bernardes, C J Soares, R R Pacheco, L H Raposo

Purpose: This study aimed to assess the impact of battery levels in single-peak and multi-peak light-curing units (LCUs) on irradiance, and their effects on glass fiber post push-out bond strength to root dentin and the degree of conversion of dual-cure universal resin cement.

Methods and materials: Sixty bovine roots underwent endodontic treatment and were randomly distributed into 6 groups (n=10), formed by combining two LCUs (single-peak and multipeak) and three battery levels (100%, 50%, and 10%). A spectrophotometer measured irradiance (mW/ cm2) and spectral irradiance (mW/cm2/nm). Push-out bond strength (PBS) tests occurred at three root regions (cervical, middle, and apical), with optical and scanning electron microscopy for failure mode analysis. Degree of conversion (DC) was evaluated across the root regions. Data were analyzed using two-way repeated measures ANOVA and the Tukey HSD test. The Fisher exact test verified failure modes (α=0.05).

Results: As multipeak LCU battery levels decreased, emitted irradiance also diminished, with notable PBS reductions in the apical thirds. Failure modes were influenced by different conditions, primarily exhibiting mixed modes. Battery levels significantly impacted DC in the multipeak LCU, particularly in the cervical region, while the single-peak LCU exhibited DC reduction at the 10% battery level in the cervical region.

Conclusions: Emitted irradiance, resin cement DC, and glass fiber post bond strength to root dentin may be influenced by varying cordless LCUs and battery levels.

目的:本研究旨在评估单峰值和多峰值光固化装置(LCU)的电池水平对辐照度的影响,以及它们对玻璃纤维柱推出后与根部牙本质的粘接强度和双固化通用树脂水门汀的转化程度的影响:60 个牛根接受了牙髓治疗,随机分为 6 组(n=10),由两个 LCU(单峰和多峰)和三个电池水平(100%、50% 和 10%)组成。分光光度计测量辐照度(毫瓦/平方厘米)和光谱辐照度(毫瓦/平方厘米/纳米)。在三个牙根区域(颈部、中部和根尖)进行了推出粘接强度(PBS)测试,并使用光学显微镜和扫描电子显微镜进行失效模式分析。对各牙根区域的转换度(DC)进行了评估。数据分析采用双向重复测量方差分析和 Tukey HSD 检验。费舍尔精确检验验证了失效模式(α=0.05):结果:随着多峰 LCU 电池电量的减少,发射辐照度也随之降低,顶端三分之二处的 PBS 明显减少。故障模式受不同条件的影响,主要表现为混合模式。电池水平对多峰 LCU 的直流电影响很大,尤其是在颈部,而单峰 LCU 在颈部电池水平为 10% 时直流电减少:结论:发射辐照度、树脂水泥直流电和玻璃纤维桩与根部牙本质的粘结强度可能会受到不同的无线低功耗装置和电池电量的影响。
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引用次数: 0
Effect of Radiotherapy on the Adhesive Interface of Caries-affected Dentin and Bioactive Restorations: A Micro-CT Analysis. 放疗对受龋齿影响的牙本质和生物活性修复体粘接界面的影响:显微 CT 分析。
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-01 DOI: 10.2341/23-128-L
L K Köse, B Oglakci, Z C Özduman, K Akdur, A Mayadağlı, N Arhun

Purpose: This study aimed to analyze the presence of defects within the adhesive interface formed with five bioactive dental materials and caries-affected dentin concerning the timing of radiotherapy (before or after the restorative procedures) by micro-CT.

Methods and materials: A total of 96 carious human molars were randomly allocated into the following groups based on the timing of the radiotherapy sequence: radiotherapy followed by restoration (RT1) or restoration followed by radiotherapy (RT2). Then, six subgroups were established within these groups based on the type of materials used (n=8). Following cavity preparation and caries removal, a universal adhesive (G-Premio Bond) was administered in self-etch mode or accompanied by applying suitable cavity conditioners according to the manufacturers' guidelines. Subsequently, restorations were performed using five bioactive restorative materials (resin-modified glass-ionomer [Fuji II LC], high-viscosity glass-ionomer hybrid [EQUIA Forte HT], giomer [Beautifil II], alkasite [Cention N], and dual-cure bulk-fill composite [Activa Bioactive Restorative]) and a conventional microhybrid resin composite (Filtek Z250). The radiotherapy regimen encompassed 60 Grays (Gy) administered at a rate of 2 Gy/day over 6 weeks, 5 days a week. Micro-CT analysis was employed to assess adhesive defects at the interface between caries-affected dentin and the restorations. The data were analyzed using Kruskal-Wallis, Mann-Whitney U, and Dunn tests (α=0.05).

Results: RT2 caused significantly higher adhesive defects than RT1 for the Filtek Z250 and Activa Bioactive Restorative subgroups (p<0.05). For RT1, no significant differences were found in adhesive defects among all tested subgroups (p>0.05). By contrast, for RT2, adhesive defects were significantly higher for the Activa Bioactive Restorative and Cention N subgroups than for the EQUIA Forte HT and Beautifil II subgroups (p<0.05).

Conclusions: When using most bioactive restorative materials, the timing of radiotherapy had no significant influence on the adhesive interface. Regarding restoration following a radiotherapy protocol, a favorable impact was identified with high-viscosity glass ionomer hybrid cement and giomer bioactive restorations compared with dual-cure bioactive bulk-fill composite and alkasite restorations.

目的:本研究旨在通过显微 CT 分析五种生物活性牙科材料与受龋病影响的牙本质形成的粘接界面内是否存在与放疗时间(修复程序之前或之后)有关的缺陷:根据放射治疗的时间顺序,将 96 颗龋坏的人类磨牙随机分为以下几组:先放射治疗后修复(RT1)或先修复后放射治疗(RT2)。然后,根据所使用材料的类型在这些组中设立了六个亚组(n=8)。在制备牙洞和去除龋齿后,根据制造商的指导,以自酸蚀模式使用通用粘合剂(G-Premio Bond),或同时使用适当的牙洞调节剂。随后,使用五种生物活性修复材料(树脂改性玻璃-离子体[Fuji II LC]、高粘度玻璃-离子体混合体[EQUIA Forte HT]、giomer[Beautifil II]、alkasite[Cention N]和双固化体填充复合材料[Activa 生物活性修复体])和传统的微混合树脂复合材料(Filtek Z250)进行修复。放疗方案包括 60 格瑞(Gy),每天 2 Gy,持续 6 周,每周 5 天。采用显微 CT 分析评估受龋齿影响的牙本质与修复体之间界面的粘接缺陷。数据采用 Kruskal-Wallis、Mann-Whitney U 和 Dunn 检验进行分析(α=0.05):结果:对于 Filtek Z250 和 Activa 生物活性修复体亚组,RT2 造成的粘接缺陷明显高于 RT1(P0.05)。相比之下,对于 RT2,Activa 生物活性修复体和 Cention N 亚组的粘接缺陷明显高于 EQUIA Forte HT 和 Beautifil II 亚组(P结论:在使用大多数生物活性修复材料时,放疗时间对粘接界面没有明显影响。关于放射治疗后的修复,与双固化生物活性膨体填充复合材料和烷基石修复体相比,高粘度玻璃离子聚合物混合粘结剂和giomer生物活性修复体具有有利的影响。
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引用次数: 0
Influence of Surface Pretreatment on the Bond Strength of a Resin Luting Cement to Saliva-contaminated Enamel and Dentin. 表面预处理对树脂粘接剂与受唾液污染的牙釉质和牙本质粘接强度的影响
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-01 DOI: 10.2341/23-170-L
H Iwama, R Ishii, T Takamizawa, R Aoki, S Watanabe, K Hayashi, A Kamimoto, M Miyazaki

Objectives: This study aimed to evaluate the influence of surface pretreatment on the shear bond strength (SBS) of a resin luting cement to enamel and dentin with saliva contamination. The surface free energies (SFE) of the adherent surfaces were also determined.

Methods and materials: Bovine enamel and dentin were used in this study. For the saliva-contamination, human saliva was applied to the adherent surface for 60 seconds and then air-dried, and the specimens without saliva contamination served as controls. One group of contaminated surfaces was untreated (SC), and the others were pretreated with Katana Cleaner (KC), Multi Etchant (ME), or Ultra-Etch (UE). Fifteen specimens were prepared to measure the SBS for each test group.The mixed resin luting cement paste was applied to the alumina-blasted surface of a stainless-steel rod and placed on the prepared tooth surface. The luting cement was light irradiated for 40 seconds. The bonded specimens were stored for 24 hours at 37°C and half of the bonded specimens underwent 10,000 thermal cycles. The SBS and SFE of the specimens after different pre-treatments were measured.

Results: The two-way ANOVA revealed that the factors of pretreatment agent and storage condition had a significant effect on the SBS to enamel and dentin. The SFE values of the SC group were significantly lower than those of the other groups in both enamel and dentin. The SFE of pretreated surface was material dependent.

Conclusions: A pretreatment agent containing functional monomers was shown to be effective in removing saliva contaminants and in creating an effective bonding surface for the resin luting cement.

研究目的本研究旨在评估表面预处理对树脂衬垫粘结剂与受唾液污染的牙釉质和牙本质的剪切粘结强度(SBS)的影响。同时还测定了粘附表面的表面自由能(SFE):本研究使用了牛的牙釉质和牙本质。对于唾液污染,将人类唾液涂抹在附着表面 60 秒后风干,没有唾液污染的试样作为对照。一组受污染的表面未经处理(SC),另一组则使用卡塔纳清洁剂(KC)、多元蚀刻剂(ME)或超蚀刻剂(UE)进行预处理。每个测试组都制备了 15 个试样来测量 SBS。将混合树脂胶合剂涂抹在不锈钢棒的氧化铝喷砂表面上,然后放在准备好的牙齿表面上。将粘结剂照射 40 秒钟。粘结试样在 37°C 下存放 24 小时,一半的粘结试样经历了 10,000 次热循环。测量不同预处理后试样的 SBS 和 SFE:双因素方差分析显示,预处理剂和储存条件对釉质和牙本质的 SBS 有显著影响。在珐琅质和牙本质上,SC 组的 SFE 值明显低于其他组。预处理表面的 SFE 值与材料有关:含有功能性单体的预处理剂可以有效去除唾液污染物,并为树脂胶合剂创造一个有效的粘结表面。
{"title":"Influence of Surface Pretreatment on the Bond Strength of a Resin Luting Cement to Saliva-contaminated Enamel and Dentin.","authors":"H Iwama, R Ishii, T Takamizawa, R Aoki, S Watanabe, K Hayashi, A Kamimoto, M Miyazaki","doi":"10.2341/23-170-L","DOIUrl":"10.2341/23-170-L","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to evaluate the influence of surface pretreatment on the shear bond strength (SBS) of a resin luting cement to enamel and dentin with saliva contamination. The surface free energies (SFE) of the adherent surfaces were also determined.</p><p><strong>Methods and materials: </strong>Bovine enamel and dentin were used in this study. For the saliva-contamination, human saliva was applied to the adherent surface for 60 seconds and then air-dried, and the specimens without saliva contamination served as controls. One group of contaminated surfaces was untreated (SC), and the others were pretreated with Katana Cleaner (KC), Multi Etchant (ME), or Ultra-Etch (UE). Fifteen specimens were prepared to measure the SBS for each test group.The mixed resin luting cement paste was applied to the alumina-blasted surface of a stainless-steel rod and placed on the prepared tooth surface. The luting cement was light irradiated for 40 seconds. The bonded specimens were stored for 24 hours at 37°C and half of the bonded specimens underwent 10,000 thermal cycles. The SBS and SFE of the specimens after different pre-treatments were measured.</p><p><strong>Results: </strong>The two-way ANOVA revealed that the factors of pretreatment agent and storage condition had a significant effect on the SBS to enamel and dentin. The SFE values of the SC group were significantly lower than those of the other groups in both enamel and dentin. The SFE of pretreated surface was material dependent.</p><p><strong>Conclusions: </strong>A pretreatment agent containing functional monomers was shown to be effective in removing saliva contaminants and in creating an effective bonding surface for the resin luting cement.</p>","PeriodicalId":19502,"journal":{"name":"Operative dentistry","volume":" ","pages":"586-596"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142073496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cover II. 封面 II.
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-01 DOI: 10.2341/1559-2863-49.5.ii
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引用次数: 0
Effectiveness of Three Bleaching Techniques for Endodontically Treated Teeth: A Randomized Clinical Trial. 三种牙髓治疗牙齿漂白技术的效果:随机临床试验
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-09-01 DOI: 10.2341/24-005-C
B Gaidarji, B G Perez, L B Durand

Background: Various techniques, products, and protocols are used for the bleaching of non-vital teeth. The walking bleach technique involves sealing the bleaching agent in the pulp chamber. In the inside/outside technique, a low-concentration bleaching agent is applied at home using a custom tray. In the in-office technique, a high-concentration bleaching agent is applied by a dental professional. Limited research has compared the effectiveness of these techniques.

Objective: This clinical trial aimed to evaluate the effectiveness of the walking bleach, the inside/outside, and the in-office bleaching techniques.

Methods and materials: Fifty-four discolored teeth were selected according to eligibility criteria, randomized, and assigned to three treatment groups (n=18): walking bleach (sodium perborate - SP), inside/outside bleaching (7.5% hydrogen peroxide -HP7.5), and in-office bleaching (35% hydrogen peroxide - HP35). A cervical seal was placed in all the teeth, and nonvital bleaching was performed according to each technique. The CIELab color coordinates were measured using a clinical spectrophotometer at baseline, weekly, and at the 1-week follow-up. ΔE00 and ΔWID were calculated between the baseline and each evaluation time point. The ANOVA, Fisher exact, and Kruskal-Wallis tests were used to compare the quantitative variables, and the Fisher exact test, to determine the association among categorical variables. Bleaching effectiveness was interpreted by 50:50% perceptibility and acceptability thresholds.

Results: As the treatment progressed, all techniques presented a significant increase in L* and WID (p<0.001), and a significant decrease in a* and b* (p<0.001). HP7.5 and HP35 presented greater increases in WID mean values, in comparison with SP (p=0.006). No significant differences were observed among the techniques for ΔE00 after treatment completion (p=0.383). There were no statistical differences in bleaching effectiveness among the techniques after treatment completion (p=0.098).

Conclusion: All techniques presented excellent effectiveness after treatment completion. However, HP7.5 and HP35 techniques provided a more rapid whitening response.

背景:用于漂白无活力牙齿的技术、产品和方案多种多样。步行漂白技术是将漂白剂密封在牙髓腔内。在内外漂白技术中,低浓度漂白剂可在家中使用定制托盘进行漂白。在诊所内技术中,由牙科专业人员使用高浓度漂白剂。对这些技术的有效性进行比较的研究有限:这项临床试验旨在评估步行漂白、内/外漂白和诊室漂白技术的效果:根据资格标准筛选出54颗变色牙,随机分配到三个治疗组(n=18):步行漂白(过硼酸钠-SP)、内/外漂白(7.5%过氧化氢-HP7.5)和诊室漂白(35%过氧化氢-HP35)。所有牙齿都进行了牙颈部封闭,并根据每种技术进行了非重要漂白。使用临床分光光度计测量基线、每周和一周随访时的 CIELab 色坐标。计算基线和每个评估时间点之间的ΔE00和ΔWID。方差分析、费雪精确检验和 Kruskal-Wallis 检验用于比较定量变量,费雪精确检验用于确定分类变量之间的关联。漂白效果以 50:50 的可感知度和可接受性阈值来解释:结果:随着治疗的进行,所有技术的 L* 和 WID 都有显著增加(p 结论:所有技术在治疗完成后都有很好的效果:结论:治疗结束后,所有技术都取得了很好的效果。不过,HP7.5 和 HP35 技术的美白效果更快。
{"title":"Effectiveness of Three Bleaching Techniques for Endodontically Treated Teeth: A Randomized Clinical Trial.","authors":"B Gaidarji, B G Perez, L B Durand","doi":"10.2341/24-005-C","DOIUrl":"10.2341/24-005-C","url":null,"abstract":"<p><strong>Background: </strong>Various techniques, products, and protocols are used for the bleaching of non-vital teeth. The walking bleach technique involves sealing the bleaching agent in the pulp chamber. In the inside/outside technique, a low-concentration bleaching agent is applied at home using a custom tray. In the in-office technique, a high-concentration bleaching agent is applied by a dental professional. Limited research has compared the effectiveness of these techniques.</p><p><strong>Objective: </strong>This clinical trial aimed to evaluate the effectiveness of the walking bleach, the inside/outside, and the in-office bleaching techniques.</p><p><strong>Methods and materials: </strong>Fifty-four discolored teeth were selected according to eligibility criteria, randomized, and assigned to three treatment groups (n=18): walking bleach (sodium perborate - SP), inside/outside bleaching (7.5% hydrogen peroxide -HP7.5), and in-office bleaching (35% hydrogen peroxide - HP35). A cervical seal was placed in all the teeth, and nonvital bleaching was performed according to each technique. The CIELab color coordinates were measured using a clinical spectrophotometer at baseline, weekly, and at the 1-week follow-up. ΔE00 and ΔWID were calculated between the baseline and each evaluation time point. The ANOVA, Fisher exact, and Kruskal-Wallis tests were used to compare the quantitative variables, and the Fisher exact test, to determine the association among categorical variables. Bleaching effectiveness was interpreted by 50:50% perceptibility and acceptability thresholds.</p><p><strong>Results: </strong>As the treatment progressed, all techniques presented a significant increase in L* and WID (p<0.001), and a significant decrease in a* and b* (p<0.001). HP7.5 and HP35 presented greater increases in WID mean values, in comparison with SP (p=0.006). No significant differences were observed among the techniques for ΔE00 after treatment completion (p=0.383). There were no statistical differences in bleaching effectiveness among the techniques after treatment completion (p=0.098).</p><p><strong>Conclusion: </strong>All techniques presented excellent effectiveness after treatment completion. However, HP7.5 and HP35 techniques provided a more rapid whitening response.</p>","PeriodicalId":19502,"journal":{"name":"Operative dentistry","volume":" ","pages":"519-530"},"PeriodicalIF":1.4,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142073494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of Cut-out-rescan and Data Exchange by Over-scanning Techniques on Marginal Fit of CAD/CAM Lithium Disilicate Crowns. 通过过度扫描技术进行切口扫描和数据交换对 CAD/CAM 二硅酸锂冠边缘密合度的影响。
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-07-01 DOI: 10.2341/24-024-L
L Passos, M Musskopf, A B Vasconcellos

Objective: Evaluate the impact of adjustment procedures - cut-out-rescan (COR) and data exchange by over-scanning (DEOS) techniques - through CAD/CAM software on the marginal fit outcome of ceramic crowns.

Methods and materials: Twenty-eight de-identified teeth were adapted in a mandibular typodont set. Tooth #19 was prepared for a lithium disilicate crown and seven groups, G0 to G6 (n=10), were created based on the rescanned areas (mesial and/or buccal) on the typodont using an intraoral scanner through COR or DEOS techniques. A digital workflow was used to design and mill 70 crowns according to the groups. Each crown was temporarily cemented on tooth #19 and scanned with micro-computed tomography to measure the marginal fit. The data were analyzed statistically by the Kruskal-Wallis test followed by the Mann-Whitney test to compare the groups pairwise as a post-hoc (α=0.05).

Results: Statistically significant differences were found for vertical misfit (μm) between the groups for Marginal Gap Buccal (MGB) and Marginal Gap Mesial (MGM) (p=0.003 and p=0.029, respectively). No significant difference was found for Finish Line Buccal (FLB) and Finish Line Mesial (FLM) (p=0.062 and p=0.092, respectively). G3 (COR buccal and mesial) had the highest MGB (57.75 μm), statistically different from all other groups. G4 (DEOS buccal) (41.60 μm) was different from G6 (DEOS buccal and mesial) (44.21 μm) (p=0.023). For MGM, G0 (control) (53.96 μm) was different from G5 (DEOS mesial) (45.76 μm) and G6 (DEOS buccal and mesial) (48.56 vm) (p=0.013 and p=0.041, respectively) and G2 (COR mesial) (58.43 μm) was different from G5 (DEOS mesial) (45.76 μm) (p=0.016).

Conclusions: Despite a statistically significant difference in certain groups for both techniques, COR and DEOS techniques are viable options for image editing during acquisition. Lithium disilicate crowns can be produced with satisfactory marginal gap values utilizing a chairside CAD/CAM system.

目的:通过CAD/CAM软件评估调整程序--切出扫描(COR)和过扫描数据交换(DEOS)技术--对陶瓷冠边缘密合效果的影响:在一套下颌正畸装置中改装了 28 颗身份不明的牙齿。根据口内扫描仪通过 COR 或 DEOS 技术对类型牙的重新扫描区域(中侧和/或颊侧)创建了七组,G0 至 G6(n=10)。根据不同的组别,采用数字化工作流程设计并制作了 70 个牙冠。每个牙冠都临时粘接在 19 号牙齿上,并用微型计算机断层扫描测量边缘密合度。采用 Kruskal-Wallis 检验对数据进行统计分析,然后采用 Mann-Whitney 检验对各组进行配对比较(α=0.05):各组间颊侧边缘间隙(MGB)和中侧边缘间隙(MGM)的垂直误差(μm)差异有统计学意义(分别为 p=0.003 和 p=0.029)。完成线颊面(FLB)和完成线中线(FLM)无明显差异(分别为 p=0.062 和 p=0.092)。G3(COR 颊侧和中侧)的 MGB 最高(57.75 μm),在统计学上不同于所有其他组别。G4(DEOS 颊面)(41.60 μm)与 G6(DEOS 颊面和中面)(44.21 μm)不同(P=0.023)。对于 MGM,G0(对照组)(53.96 μm)不同于 G5(DEOS 中轴)(45.76 μm)和 G6(DEOS 口腔和中轴)(48.56 μm)(分别为 p=0.013 和 p=0.041),G2(COR 中轴)(58.43 μm)不同于 G5(DEOS 中轴)(45.76 μm)(p=0.016):尽管两种技术在某些组别中存在统计学意义上的显著差异,但COR和DEOS技术都是在采集过程中进行图像编辑的可行选择。利用椅旁 CAD/CAM 系统可以制作出边缘间隙值令人满意的二硅酸锂冠。
{"title":"Impact of Cut-out-rescan and Data Exchange by Over-scanning Techniques on Marginal Fit of CAD/CAM Lithium Disilicate Crowns.","authors":"L Passos, M Musskopf, A B Vasconcellos","doi":"10.2341/24-024-L","DOIUrl":"10.2341/24-024-L","url":null,"abstract":"<p><strong>Objective: </strong>Evaluate the impact of adjustment procedures - cut-out-rescan (COR) and data exchange by over-scanning (DEOS) techniques - through CAD/CAM software on the marginal fit outcome of ceramic crowns.</p><p><strong>Methods and materials: </strong>Twenty-eight de-identified teeth were adapted in a mandibular typodont set. Tooth #19 was prepared for a lithium disilicate crown and seven groups, G0 to G6 (n=10), were created based on the rescanned areas (mesial and/or buccal) on the typodont using an intraoral scanner through COR or DEOS techniques. A digital workflow was used to design and mill 70 crowns according to the groups. Each crown was temporarily cemented on tooth #19 and scanned with micro-computed tomography to measure the marginal fit. The data were analyzed statistically by the Kruskal-Wallis test followed by the Mann-Whitney test to compare the groups pairwise as a post-hoc (α=0.05).</p><p><strong>Results: </strong>Statistically significant differences were found for vertical misfit (μm) between the groups for Marginal Gap Buccal (MGB) and Marginal Gap Mesial (MGM) (p=0.003 and p=0.029, respectively). No significant difference was found for Finish Line Buccal (FLB) and Finish Line Mesial (FLM) (p=0.062 and p=0.092, respectively). G3 (COR buccal and mesial) had the highest MGB (57.75 μm), statistically different from all other groups. G4 (DEOS buccal) (41.60 μm) was different from G6 (DEOS buccal and mesial) (44.21 μm) (p=0.023). For MGM, G0 (control) (53.96 μm) was different from G5 (DEOS mesial) (45.76 μm) and G6 (DEOS buccal and mesial) (48.56 vm) (p=0.013 and p=0.041, respectively) and G2 (COR mesial) (58.43 μm) was different from G5 (DEOS mesial) (45.76 μm) (p=0.016).</p><p><strong>Conclusions: </strong>Despite a statistically significant difference in certain groups for both techniques, COR and DEOS techniques are viable options for image editing during acquisition. Lithium disilicate crowns can be produced with satisfactory marginal gap values utilizing a chairside CAD/CAM system.</p>","PeriodicalId":19502,"journal":{"name":"Operative dentistry","volume":" ","pages":"484-494"},"PeriodicalIF":1.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141559420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Instrumental and Visual Evaluation of the Chameleon Effect of Single-shaded Composite Resins. 单色复合树脂变色龙效应的仪器和视觉评估
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-07-01 DOI: 10.2341/23-036-L
R M Adiguzel, L K Kose, N Arhun

Objective: To evaluate the shade-matching ability of single-shade resin-based composite restorations in different thicknesses using both instrumental and visual techniques.

Methods and materials: Cavities with 4 mm diameter and 2 mm (n=96) or 3 mm (n=96) depth were prepared in acrylic incisor teeth of shades A2, A3, B3, and C2 and restored with three single-shade resin composites, Omnichroma (Tokuyama Dental America, Encinitas, CA, USA [OM]), Vittra APS Unique (FGM Dental Group, Joinville, SC, Brazil [VU]), Zenchroma (President Dental, Allershausen, Germany [ZC]), and a microhybrid resin composite (Filtek 3M Z250 3M ESPE, St Paul, MN, USA [FZ]) of A2, A3, B3, and C2 shades. Readings were obtained using VITA Easyshade V spectrophotometer for the teeth and restorations. The CIEDE2000 (ΔE00) color difference formula was used, and the values were assessed using three-way analysis of variance (ANOVA). Forty-eight evaluators graded the shade match of 32 different specimens visually as (A) best shade match, (B) intermediate shade match, and (C) poor shade match.

Results: FZ material achieved satisfactory matches for both thicknesses, across all shades, and OM material demonstrated statistically significant lower shade matches than the ZC and the FZ materials (p<0.05). VU exhibited poor shade match with the highest ΔE00 value on C2 shade. According to the visual examination, the best shade matches were observed for FZ on A3-shade and ZC on C2-shade teeth.

Conclusions: Shade matching for 2 mm and 3 mm-thick composite resin restorations is material- and tooth-shade dependent.

目的使用仪器和视觉技术评估不同厚度的单色树脂基复合树脂修复体的色调匹配能力:在色调为 A2、A3、B3 和 C2 的丙烯酸门牙上制备直径为 4 毫米、深度为 2 毫米(n=96)或 3 毫米(n=96)的龋洞,并用三种单色树脂复合材料进行修复:Omnichroma(Tokuyama Dental America, Encinitas, CA、Omnichroma (Tokuyama Dental America, Encinitas, CA, USA [OM])、Vittra APS Unique (FGM Dental Group, Joinville, SC, Brazil [VU])、Zenchroma (President Dental, Allershausen, Germany [ZC]),以及 A2、A3、B3 和 C2 色调的微混合树脂复合材料 (Filtek 3M Z250 3M ESPE, St Paul, MN, USA [FZ])。使用 VITA Easyshade V 分光光度计对牙齿和修复体进行读数。使用 CIEDE2000 (ΔE00) 色差公式,并使用三方差分析(ANOVA)对数值进行评估。48 位评估员对 32 个不同试样的色调匹配度进行了目测分级:(A) 最佳色调匹配度;(B) 中等色调匹配度;(C) 差异色调匹配度:结果:两种厚度的 FZ 材料在所有色调上都达到了令人满意的匹配度,而 OM 材料的色调匹配度在统计意义上明显低于 ZC 和 FZ 材料(p 结论:2 毫米和 3 毫米厚的复合树脂修复体的色调匹配取决于材料和牙色。
{"title":"Instrumental and Visual Evaluation of the Chameleon Effect of Single-shaded Composite Resins.","authors":"R M Adiguzel, L K Kose, N Arhun","doi":"10.2341/23-036-L","DOIUrl":"10.2341/23-036-L","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the shade-matching ability of single-shade resin-based composite restorations in different thicknesses using both instrumental and visual techniques.</p><p><strong>Methods and materials: </strong>Cavities with 4 mm diameter and 2 mm (n=96) or 3 mm (n=96) depth were prepared in acrylic incisor teeth of shades A2, A3, B3, and C2 and restored with three single-shade resin composites, Omnichroma (Tokuyama Dental America, Encinitas, CA, USA [OM]), Vittra APS Unique (FGM Dental Group, Joinville, SC, Brazil [VU]), Zenchroma (President Dental, Allershausen, Germany [ZC]), and a microhybrid resin composite (Filtek 3M Z250 3M ESPE, St Paul, MN, USA [FZ]) of A2, A3, B3, and C2 shades. Readings were obtained using VITA Easyshade V spectrophotometer for the teeth and restorations. The CIEDE2000 (ΔE00) color difference formula was used, and the values were assessed using three-way analysis of variance (ANOVA). Forty-eight evaluators graded the shade match of 32 different specimens visually as (A) best shade match, (B) intermediate shade match, and (C) poor shade match.</p><p><strong>Results: </strong>FZ material achieved satisfactory matches for both thicknesses, across all shades, and OM material demonstrated statistically significant lower shade matches than the ZC and the FZ materials (p<0.05). VU exhibited poor shade match with the highest ΔE00 value on C2 shade. According to the visual examination, the best shade matches were observed for FZ on A3-shade and ZC on C2-shade teeth.</p><p><strong>Conclusions: </strong>Shade matching for 2 mm and 3 mm-thick composite resin restorations is material- and tooth-shade dependent.</p>","PeriodicalId":19502,"journal":{"name":"Operative dentistry","volume":" ","pages":"432-442"},"PeriodicalIF":1.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141580416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theobromine for Remineralization of White Spot Lesions on Dental Enamel: A Systematic Review and Meta-analysis. 用于牙釉质白斑再矿化的可可碱:系统回顾与元分析》。
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-07-01 DOI: 10.2341/23-153-LIT
Arj da Silva, Ri Dos Santos Gonçalves, Mhc de Vasconcelos Catão

Aim: This systematic review and meta-analysis evaluated theobromine's (Theobroma cacao) potential in remineralizing white spot lesions in dental enamel. Methods: This study is reported according to the PRISMA checklist and was registered in PROSPERO (CRD42023414371). In vitro tests that evaluated the remineralizing potential of theobromine compared to fluoride ion after demineralization for the formation of white spot lesions on enamel were selected, with no limitation on the year of publication. Electronic searches were performed in PubMed/MEDLINE, Scopus, and Web of Science by two independent researchers. Thirty articles were received of which six were selected according to the inclusion criteria.

Results: The selected studies evaluated the Enamel Surface Microhardness (SMH), Vickers or Knoop, before and after treatment with theobromine and fluoride solutions. For the SMH Vickers, there were no differences between groups at baseline (p=1.00; mean difference: -0.00; CI: -11.36 to 11.36) and after treatment (p=0.51; mean difference: 4.12; CI: -8.16 to 16.41). The results of SMH Knoop showed differences between groups at baseline, favoring the experimental group (p=0.002; mean difference: 9.84; CI: 3.65 to 16.02) and after treatment favoring the control group (p=0.00001; mean difference: -5.45; CI: -7.62 to -3.27).

Conclusion: The use of theobromine increases the microhardness of dental enamel subjected to a demineralization process, thus being effective in the remineralization of this tissue with success equivalent to that obtained with the use of fluoride.

目的:本系统综述和荟萃分析评估了可可碱(可可碱)在再矿化牙釉质白斑病变方面的潜力。研究方法本研究按照 PRISMA 核对表进行报告,并在 PROSPERO(CRD42023414371)上进行了注册。选取了评估可可碱与氟离子在牙釉质脱矿后形成白斑病变时的再矿化潜力的体外试验,发表年份不限。两位独立研究人员在 PubMed/MEDLINE、Scopus 和 Web of Science 上进行了电子检索。共收到 30 篇文章,根据纳入标准选出其中 6 篇:所选研究对使用可可碱和氟化物溶液治疗前后的牙釉质表面显微硬度(SMH)、维氏或努氏进行了评估。就 SMH 维氏硬度而言,基线(p=1.00;平均差异:-0.00;CI:-11.36 至 11.36)和治疗后(p=0.51;平均差异:4.12;CI:-8.16 至 16.41)两组间无差异。SMH Knoop 的结果显示,基线时各组之间存在差异,实验组更有利(P=0.002;平均差异:9.84;CI:3.65 至 16.02),治疗后对照组更有利(P=0.00001;平均差异:-5.45;CI:-7.62 至 -3.27):使用可可碱可提高脱矿过程中牙釉质的微硬度,从而有效地使牙釉质组织再矿化,其成功率与使用氟化物相当。
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引用次数: 0
An In Vitro Study of Retention and Marginal Adaptation of Endocrowns With Different Intracoronal Depths. 不同冠状沟内深度内冠的保留和边缘适应性体外研究
IF 1.4 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Pub Date : 2024-07-01 DOI: 10.2341/23-063-L
E C Tiew, Nmn Azis, L A Teh, Sna Shukor, C L Goo

Background: Marginal adaptation and retention of endocrowns are crucial for the success and survival of endocrowns. This study aimed to investigate the effect of different materials and intracoronal depth on the retention and marginal adaptation of CAD/CAM fabricated all-ceramic endocrowns.

Methods: Thirty-six mandibular premolar teeth with an average surface area of 64.49 mm2 were prepared to receive CAM/CAM fabricated endocrowns. Samples were divided randomly and equally into groups of lithium disilicate with 2 mm intracoronal depth (LD2), lithium disilicate with 4 mm intracoronal depth (LD4), polymer infiltrated ceramic network with 2 mm intracoronal depth (PICN2) and polymer infiltrated ceramic network with 4 mm intracoronal depth (PICN4). All endocrowns were cemented using ParaCore resin cement with 14N pressure and cured for 20 seconds. Fifty measurements of absolute marginal discrepancy (AMD) were done using a stereomicroscope after cementation. After 24 hours, all samples were subjected to thermocycling before the retention test. This involved using a universal testing machine with a crosshead speed of 0.5 mm/min and applying a load of 500N. The maximum force to detach the crown was recorded in newtons and the mode of failure was identified.

Results: Two-way ANOVA revealed that the AMD for PICN was statistically significantly better than lithium disilicate (p=0.01). No statistically significant difference was detected in the AMD between the two intracoronal depths (p=0.72). PICN and endocrowns with 4 mm intracoronal depth had statistically significant better retention (p<0.05). 72.22% of the sample suffered from cohesive failures and 10 LD endocrowns suffered adhesive failures.

Conclusions: Within the limitations of this study, we found that different materials and intracoronal depths can indeed influence the retention of CAD/CAM fabricated endocrowns. Based on the controlled setting findings, PICN was found to have better retention and better marginal adaptation than similar lithium disilicate premolar endocrowns.

背景:内冠的边缘适应和固位对于内冠的成功和存活至关重要。本研究旨在探讨不同材料和冠内深度对 CAD/CAM 制作的全瓷内冠的固位和边缘适应性的影响:准备了 36 颗下颌前磨牙,平均表面积为 64.49 mm²,以接受 CAM/CAM 制作的内冠。样本被随机平均分为冠内深度为 2 毫米的二硅酸锂(LD2)组、冠内深度为 4 毫米的二硅酸锂(LD4)组、冠内深度为 2 毫米的聚合物浸润陶瓷网络(PICN2)组和冠内深度为 4 毫米的聚合物浸润陶瓷网络(PICN4)组。所有内冠均使用 ParaCore 树脂粘结剂,压力为 14N,固化时间为 20 秒。粘结后使用体视显微镜测量了 50 个绝对边缘差(AMD)。24 小时后,在进行固位测试前对所有样本进行热循环测试。这需要使用万能试验机,其十字头速度为 0.5 mm/min,负载为 500N。以牛顿为单位记录剥离牙冠的最大力,并确定失效模式:双向方差分析显示,PICN 的 AMD 在统计学上明显优于二硅酸锂(P=0.01)。两种冠内深度的 AMD 差异无统计学意义(p=0.72)。PICN和冠内深度为4毫米的内冠在统计学上具有更好的固位效果(p结论:在本研究的限制条件下,我们发现不同的材料和冠内深度确实会影响 CAD/CAM 制作的内冠的固位情况。根据对照组的研究结果,我们发现 PICN 比类似的二硅酸锂前臼齿内冠具有更好的固位和边缘适应性。
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引用次数: 0
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Operative dentistry
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