Pub Date : 2024-07-01DOI: 10.21608/edj.2024.291295.3046
S. kandil, Sameh Abou-Steit, Nancy Helmy Mickael
Purpose: To evaluate clinical performance of fiber reinforced composite base and bonded CAD/CAM resin composite endocrowns compared to lithium disilicate endocrowns over one year. Methods: A total of 110 endocrowns, 55 lithium disilicate endocrowns (group I) (IPS e. max CAD) and 55 of bonded CAD/CAM resin composite endocrowns with fiber reinforced FRC base (group II) (Grandio) were used to restore endodontically treated molars. First shade selection was performed followed by cavity preparation and digital impression. Then restorations were designed, milled and checked intraorally before cementation using resin cement. The restorations were evaluated at baseline, 6 and 12 months using Modified USPHS criteria. Statistical analysis was performed with SPSS 20®, Graph Pad Prism® and Microsoft Excel 2016. Results: Regarding fracture and marginal adaptation, all restorations in both groups had Alpha score (100%); at base line, after 6, and 12 months. Regarding retention, all restorations in both groups had Alpha score (100%); at base line, and after 6 months. While after 12 months, only one case had Charlie score in group I with insignificant difference between groups as P=0.32. Regarding shade match, all restorations in both groups had Alpha score (100%); at base line while after 6 months two cases were Bravo in group II with insignificant difference between groups as P=0.14. While after 12 months, three cases were Bravo in group II with insignificant difference between groups as P=0.07. Conclusion: CAD/CAM resin composite endocrowns with fiber reinforced FRC base are just as dependable as lithium disilicate for restoring non-vital posterior teeth.
{"title":"Clinical performance of fiber reinforced FRC base and bonded CAD/CAM resin composite endocrowns versus conventional lithium disilicate endocrowns in posterior teeth (Randomized Clinical Trial)","authors":"S. kandil, Sameh Abou-Steit, Nancy Helmy Mickael","doi":"10.21608/edj.2024.291295.3046","DOIUrl":"https://doi.org/10.21608/edj.2024.291295.3046","url":null,"abstract":"Purpose: To evaluate clinical performance of fiber reinforced composite base and bonded CAD/CAM resin composite endocrowns compared to lithium disilicate endocrowns over one year. Methods: A total of 110 endocrowns, 55 lithium disilicate endocrowns (group I) (IPS e. max CAD) and 55 of bonded CAD/CAM resin composite endocrowns with fiber reinforced FRC base (group II) (Grandio) were used to restore endodontically treated molars. First shade selection was performed followed by cavity preparation and digital impression. Then restorations were designed, milled and checked intraorally before cementation using resin cement. The restorations were evaluated at baseline, 6 and 12 months using Modified USPHS criteria. Statistical analysis was performed with SPSS 20®, Graph Pad Prism® and Microsoft Excel 2016. Results: Regarding fracture and marginal adaptation, all restorations in both groups had Alpha score (100%); at base line, after 6, and 12 months. Regarding retention, all restorations in both groups had Alpha score (100%); at base line, and after 6 months. While after 12 months, only one case had Charlie score in group I with insignificant difference between groups as P=0.32. Regarding shade match, all restorations in both groups had Alpha score (100%); at base line while after 6 months two cases were Bravo in group II with insignificant difference between groups as P=0.14. While after 12 months, three cases were Bravo in group II with insignificant difference between groups as P=0.07. Conclusion: CAD/CAM resin composite endocrowns with fiber reinforced FRC base are just as dependable as lithium disilicate for restoring non-vital posterior teeth.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141697168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.280972.2995
E. M. El.Sayed, A. Nassar
Aim: A clinical study to assess the rebound of the color of bleached teeth for one year follow up. Materials and methods: Thirty non-smoker patients (18-23years) having anterior upper and lower segments from canine to canine with an average shade of A4 were selected. Teeth were checked to be free of caries, restorations, hypoplastic lesions, stains, and cracks. The shades were measured mainly by using Vita classic visual standardized shade guide and confirmed by spectrophotometer (easy shade) only in case of any confliction in the scores of both evaluators. Cooperative patients ready for follow up were involved in the present study. Segments were equally and unsystematically distributed into 2 groups (30 segments each) according to the bleaching system used, Group I: Chemical activated bleaching system 40% HP (White Smile power whitening YF) & Group II: light activated bleaching system, mixed 32% HP (White smile light whitening AC). Each group involved 15 upper and 15 lower segments at the 30 pts. Every group was distributed into 2 subgroups according to the location whether upper or lower segments. The manufacturer’s instructions were followed and applied in every bleaching process. Every tooth shade was documented before bleaching, 24 hours after
{"title":"One Year Clinical Follow-up of the rebound of bleached teeth Color using of two different in-office bleaching techniques.","authors":"E. M. El.Sayed, A. Nassar","doi":"10.21608/edj.2024.280972.2995","DOIUrl":"https://doi.org/10.21608/edj.2024.280972.2995","url":null,"abstract":"Aim: A clinical study to assess the rebound of the color of bleached teeth for one year follow up. Materials and methods: Thirty non-smoker patients (18-23years) having anterior upper and lower segments from canine to canine with an average shade of A4 were selected. Teeth were checked to be free of caries, restorations, hypoplastic lesions, stains, and cracks. The shades were measured mainly by using Vita classic visual standardized shade guide and confirmed by spectrophotometer (easy shade) only in case of any confliction in the scores of both evaluators. Cooperative patients ready for follow up were involved in the present study. Segments were equally and unsystematically distributed into 2 groups (30 segments each) according to the bleaching system used, Group I: Chemical activated bleaching system 40% HP (White Smile power whitening YF) & Group II: light activated bleaching system, mixed 32% HP (White smile light whitening AC). Each group involved 15 upper and 15 lower segments at the 30 pts. Every group was distributed into 2 subgroups according to the location whether upper or lower segments. The manufacturer’s instructions were followed and applied in every bleaching process. Every tooth shade was documented before bleaching, 24 hours after","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141710205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.283058.3011
F. Barakat, M. Attia
Purpose: to evaluate the fracture resistance of teeth after removal of separated files using either the BTR Pen system or Zumax kit, the impact of the retrieval technique on the fracture resistance, and to assess the correlation between the amount of volume lost during retrieval and fracture resistance of teeth. Materials and Methods: sixty mandibular first molar teeth were selected. Teeth were placed in acrylic resin blocks and were randomly assigned into two groups. Group A: the control group (n=20) and Group B: the study group (n=40). In the study group, five mm of ProTaper Next X2 rotary files were separated in the mesiobuccal canals. The study group was divided into two subgroups, 20 each. Group BI: the broken tool remover (BTR) pen system was utilized to retrieve separated instruments and Group BII: the Zumax kit was employed for retrieval of separated instruments. Cone Beam Computed Tomography (CBCT) was taken before and after retrieval for volumetric analysis. Fracture loading test was performed using the universal testing machine. Values were analyzed by SPSS software using F-test (ANOVA) and independent t-test. Results: there was a significant increase (P=0.001) in canal volume in the study groups. Comparing the mean fracture resistance of the three groups, no significant difference among the groups was found (P= 0.384). Conclusions: retrieving separated instruments from the coronal third of the root canal is regarded as a safe procedure and has no impact on tooth fracture resistance.
目的：评估使用 BTR Pen 系统或 Zumax 套件拔除分离锉后牙齿的抗折性、取锉技术对抗折性的影响，以及评估取锉过程中损失的体积与牙齿抗折性之间的相关性。材料和方法：选取六十颗下颌第一磨牙。将牙齿置于丙烯酸树脂块中，随机分为两组。A 组：对照组（20 个）；B 组：研究组（40 个）。在研究组中，在中颊面管中分离出 5 毫米的 ProTaper Next X2 旋转锉。研究组分为两个亚组，每组 20 人。BI 组：使用破损工具取出器（BTR）笔系统取出分离的器械；BII 组：使用 Zumax 套件取出分离的器械。在取回器械前后均拍摄了锥形束计算机断层扫描（CBCT），以进行体积分析。使用万能试验机进行骨折加载测试。使用 SPSS 软件进行 F 检验（方差分析）和独立 t 检验分析数值。结果：研究组的牙槽骨体积明显增加（P=0.001）。比较三组的平均折断阻力，各组间无明显差异（P= 0.384）。结论：从根管的冠状三分之一处取回分离的器械被认为是一种安全的程序，对牙齿的抗折性没有影响。
{"title":"Effect of Two Techniques of Separated File Removal Systems on Dentin Loss and Fracture Resistance of Teeth (In Vitro Study)","authors":"F. Barakat, M. Attia","doi":"10.21608/edj.2024.283058.3011","DOIUrl":"https://doi.org/10.21608/edj.2024.283058.3011","url":null,"abstract":"Purpose: to evaluate the fracture resistance of teeth after removal of separated files using either the BTR Pen system or Zumax kit, the impact of the retrieval technique on the fracture resistance, and to assess the correlation between the amount of volume lost during retrieval and fracture resistance of teeth. Materials and Methods: sixty mandibular first molar teeth were selected. Teeth were placed in acrylic resin blocks and were randomly assigned into two groups. Group A: the control group (n=20) and Group B: the study group (n=40). In the study group, five mm of ProTaper Next X2 rotary files were separated in the mesiobuccal canals. The study group was divided into two subgroups, 20 each. Group BI: the broken tool remover (BTR) pen system was utilized to retrieve separated instruments and Group BII: the Zumax kit was employed for retrieval of separated instruments. Cone Beam Computed Tomography (CBCT) was taken before and after retrieval for volumetric analysis. Fracture loading test was performed using the universal testing machine. Values were analyzed by SPSS software using F-test (ANOVA) and independent t-test. Results: there was a significant increase (P=0.001) in canal volume in the study groups. Comparing the mean fracture resistance of the three groups, no significant difference among the groups was found (P= 0.384). Conclusions: retrieving separated instruments from the coronal third of the root canal is regarded as a safe procedure and has no impact on tooth fracture resistance.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.277296.2982
Mohamed Hakim
Aim of study : To evaluate and compare biting force (BF) and biting force changes between conventional complete (CD) dentures and 3D printed dentures. Materials & Methods : 14 completely edentulous patients were selected from the out-patient clinic, Removable Prosthodontic Department, Beni-Suef University with age range 45–55 years with a good general and oral health. Each patient received two set of dentures, CDs and 3D printed dentures. They were asked to wear and use each denture set for 3 months but with a 2-week wash out period between them. The sequence of the dentures was randomly assigned for each patient. BF was measured with an occlusal force meter three times (at baseline, after 1 month, and after 3 months) at the 1st molar area bilaterally. The mean of the records were considered to be the patient’s maximum biting force. Results : There was a statistically significant increase in the mean values of BF in the two studied groups with insignificant difference between mean values of BF between the right & left sides and BF mean values were significantly higher with the 3D printed dentures than with the conventional complete dentures. Conclusion : Within the limitations of this study, it may be concluded that biting force increases by time in complete denture wearers. 3D printed dentures may provide better biting force than conventionally constructed dentures.
{"title":"Evaluation of Biting Force between Conventional and 3D Printed Dentures ( A Crossover study)","authors":"Mohamed Hakim","doi":"10.21608/edj.2024.277296.2982","DOIUrl":"https://doi.org/10.21608/edj.2024.277296.2982","url":null,"abstract":"Aim of study : To evaluate and compare biting force (BF) and biting force changes between conventional complete (CD) dentures and 3D printed dentures. Materials & Methods : 14 completely edentulous patients were selected from the out-patient clinic, Removable Prosthodontic Department, Beni-Suef University with age range 45–55 years with a good general and oral health. Each patient received two set of dentures, CDs and 3D printed dentures. They were asked to wear and use each denture set for 3 months but with a 2-week wash out period between them. The sequence of the dentures was randomly assigned for each patient. BF was measured with an occlusal force meter three times (at baseline, after 1 month, and after 3 months) at the 1st molar area bilaterally. The mean of the records were considered to be the patient’s maximum biting force. Results : There was a statistically significant increase in the mean values of BF in the two studied groups with insignificant difference between mean values of BF between the right & left sides and BF mean values were significantly higher with the 3D printed dentures than with the conventional complete dentures. Conclusion : Within the limitations of this study, it may be concluded that biting force increases by time in complete denture wearers. 3D printed dentures may provide better biting force than conventionally constructed dentures.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141702016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.286885.3027
Ehsan Hossam Eldin Aly, Yousra mohamed Abdelrahem, M. Eliwa
Purpose: This in vitro study is conducted to compare the effect of extracts of Ginger and Rosemary on the microhardness of white spot lesions to sodium fluoride varnish. Materials and methods: The current study used thirty extracted incisors. Ten teeth(n = 10) in each group had a remineralizing treatment: group 1:rosemary, group 2: ginger, and group 3: sodium fluoride varnish. A nail polish was applied on labial surfaces except to a window of 4x4mm and the microhardness test was done. Then all samples were immersed in demineralizing solution for four days to produce white spot lesions. Then testing microhardness was conducted. The remineralizing agents were applied to each group for ten days. The samples were immersed in artificial saliva between treatments. Lastly, microhardness test was conducted. Results: ANOVA test was used to Compare between groups. Comparison within the same group was performed using a paired t-test. The Fluoride group was not significantly different than the other 2 groups after remineralization, The mean value was 63.04±3.79 in the fluoride group, in comparison to 64.01±3.85 in the Ginger group and 62.20±3.91 in the Rosemary group. The mean value recorded in the rosemary group was significantly higher than ginger group (p=0.047). Considering the percent of change from Demineralization to remineralization the highest mean value of percentage increase occurred in the ginger group (34.50±18; median 30.98), succeeded by fluoride (30.49±15.54; median 32.53). Conclusions: Rosemary, ginger, and fluoride varnish reduce white spot lesions and are more favorable for prevention and remineralization of early enamel lesions.
{"title":"Effectiveness of natural remineralizing agents on microhardness of white spot lesions: In vitro study","authors":"Ehsan Hossam Eldin Aly, Yousra mohamed Abdelrahem, M. Eliwa","doi":"10.21608/edj.2024.286885.3027","DOIUrl":"https://doi.org/10.21608/edj.2024.286885.3027","url":null,"abstract":"Purpose: This in vitro study is conducted to compare the effect of extracts of Ginger and Rosemary on the microhardness of white spot lesions to sodium fluoride varnish. Materials and methods: The current study used thirty extracted incisors. Ten teeth(n = 10) in each group had a remineralizing treatment: group 1:rosemary, group 2: ginger, and group 3: sodium fluoride varnish. A nail polish was applied on labial surfaces except to a window of 4x4mm and the microhardness test was done. Then all samples were immersed in demineralizing solution for four days to produce white spot lesions. Then testing microhardness was conducted. The remineralizing agents were applied to each group for ten days. The samples were immersed in artificial saliva between treatments. Lastly, microhardness test was conducted. Results: ANOVA test was used to Compare between groups. Comparison within the same group was performed using a paired t-test. The Fluoride group was not significantly different than the other 2 groups after remineralization, The mean value was 63.04±3.79 in the fluoride group, in comparison to 64.01±3.85 in the Ginger group and 62.20±3.91 in the Rosemary group. The mean value recorded in the rosemary group was significantly higher than ginger group (p=0.047). Considering the percent of change from Demineralization to remineralization the highest mean value of percentage increase occurred in the ginger group (34.50±18; median 30.98), succeeded by fluoride (30.49±15.54; median 32.53). Conclusions: Rosemary, ginger, and fluoride varnish reduce white spot lesions and are more favorable for prevention and remineralization of early enamel lesions.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.290051.3040
Manal Abdelbaky, mostafa shaker
Aim: The present randomized clinical trial was designed to investigate the effect of cryotherapy (cryo) utilizing chlorhexidine (CHX) as compared to saline (NS) on pain reduction after single visit endodontic treatment. Methodology: Selected patients were seeking emergency treatment of painful symptomatic irreversible pulpitis with symptomatic apical periodontitis for single rooted teeth. Sixty-eight male patients, 25 to 50 years old were distributed randomly in 4 groups of 17 each according to the final irrigation protocol: control (GI): NS at room temperature, control (GII): CHX at room temperature, intervention (GIII): cryo with NS (cryo/NS), , and intervention (G IV): (cryo / CHX) before final obturation in the same visit. Patients were trained and asked to report pain incidence and level after12, 24, 48, 72 hours and at 7 days as well as frequency of analgesic intake. Kruskal Wallis, followed by Dunn`s multiple comparisons test were used for comparison between the 4 groups, while Chi square test was used for qualitative data. The significance level was set at p ≤0.05. Results: G III: (cryo/NS) and G IV: cryo/CHX showed significantly highest pain reduction after 24, 48, and 72 hours P= 0.000 I. Significantly more prolonged pain reduction curve was found in GI: cryo/NS. Pain in both tested groups declined to no pain after 7 days. Frequency of analgesic need was insignificant for the two groups P=0.27. Conclusions: From the results of the present study it appeared clearly that cryo helped in pain reduction whether used with CHX or NS. CHX used as a cryo material showed insignificant trend toward effective time dependent pain reduction as compared to NS. This might be because of its substantivity. Further study is needed to better clarifying this point.
{"title":"Effectiveness of Two Intracanal Irrigation Solutions Delivered Through Cryotherapy on Post-Endodontic Pain Relieve. A Randomized Clinical Trial","authors":"Manal Abdelbaky, mostafa shaker","doi":"10.21608/edj.2024.290051.3040","DOIUrl":"https://doi.org/10.21608/edj.2024.290051.3040","url":null,"abstract":"Aim: The present randomized clinical trial was designed to investigate the effect of cryotherapy (cryo) utilizing chlorhexidine (CHX) as compared to saline (NS) on pain reduction after single visit endodontic treatment. Methodology: Selected patients were seeking emergency treatment of painful symptomatic irreversible pulpitis with symptomatic apical periodontitis for single rooted teeth. Sixty-eight male patients, 25 to 50 years old were distributed randomly in 4 groups of 17 each according to the final irrigation protocol: control (GI): NS at room temperature, control (GII): CHX at room temperature, intervention (GIII): cryo with NS (cryo/NS), , and intervention (G IV): (cryo / CHX) before final obturation in the same visit. Patients were trained and asked to report pain incidence and level after12, 24, 48, 72 hours and at 7 days as well as frequency of analgesic intake. Kruskal Wallis, followed by Dunn`s multiple comparisons test were used for comparison between the 4 groups, while Chi square test was used for qualitative data. The significance level was set at p ≤0.05. Results: G III: (cryo/NS) and G IV: cryo/CHX showed significantly highest pain reduction after 24, 48, and 72 hours P= 0.000 I. Significantly more prolonged pain reduction curve was found in GI: cryo/NS. Pain in both tested groups declined to no pain after 7 days. Frequency of analgesic need was insignificant for the two groups P=0.27. Conclusions: From the results of the present study it appeared clearly that cryo helped in pain reduction whether used with CHX or NS. CHX used as a cryo material showed insignificant trend toward effective time dependent pain reduction as compared to NS. This might be because of its substantivity. Further study is needed to better clarifying this point.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141697249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.269833.2939
A. Essa
Background and objectives: Tumor angiogenesis and inflammation perception are intricately linked to cancer progression. Vascular endothelial growth factor (VEGF) controls distinct procedures in angiogenesis of pathological conditions in metabolic functions of cancer cells with the inflammatory cytokine inducible nitric oxide synthase (iNOS) in parenchymal together with stromal cells of oral squamous cell carcinoma (OSCC) as well as assessing microvessel density (MVD). Methods: Immunohistochemistry was applied to analyze VEGF, iNOS as well as CD31 expression within 31 OSCCs paraffin blocks, which grouped into 13 well differentiated, 10 moderately differentiated, and 8 poorly differentiated (paraffin blocks OSCC). Results: Both VEGF and iNOS exhibit strong expression in both parenchymal and stromal cells in all grades of OSCC together with increased MVD. Conclusion: Enhanced expression of VEGF and iNOS together with MVD potentially correlate with OSCC grades.
{"title":"Colocalization of VEGF and iNOS in Parenchymal and Stromal Cells of Oral Squamous Cell Carcinoma","authors":"A. Essa","doi":"10.21608/edj.2024.269833.2939","DOIUrl":"https://doi.org/10.21608/edj.2024.269833.2939","url":null,"abstract":"Background and objectives: Tumor angiogenesis and inflammation perception are intricately linked to cancer progression. Vascular endothelial growth factor (VEGF) controls distinct procedures in angiogenesis of pathological conditions in metabolic functions of cancer cells with the inflammatory cytokine inducible nitric oxide synthase (iNOS) in parenchymal together with stromal cells of oral squamous cell carcinoma (OSCC) as well as assessing microvessel density (MVD). Methods: Immunohistochemistry was applied to analyze VEGF, iNOS as well as CD31 expression within 31 OSCCs paraffin blocks, which grouped into 13 well differentiated, 10 moderately differentiated, and 8 poorly differentiated (paraffin blocks OSCC). Results: Both VEGF and iNOS exhibit strong expression in both parenchymal and stromal cells in all grades of OSCC together with increased MVD. Conclusion: Enhanced expression of VEGF and iNOS together with MVD potentially correlate with OSCC grades.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141709126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.290406.3041
Omnia Nabil, A. S. Idris
Objectives. To evaluate the effect of two preparation designs of partial laminate veneers on the fracture resistance of anterior teeth with full and half incisal edge fracture. Materials and Methods. 48 upper central incisors were divided into four equal groups: two groups simulated completely fractured incisal edge: Group (Full/Cham): with chamfer design and Group (Full/Bev): with bevel design and two groups simulated half fractured incisal edge: Group (Half/Cham): with chamfer design and Group (Half/Bev): with bevel design. Lithium disilicate partial veneers were constructed and cemented using light-curing resin cement. All samples were mounted on universal testing machine to test their fracture resistance. Fractured samples were categorized as restorable or non-restorable based on the crack/fracture extension relative to the cemento-enamel junction. Results. Group (Full/Cham): (361.05 ± 11.39 N) had significantly the highest fracture resistance, followed by Group (Full/Bev): (207.1 ± 10.85 N), while Group (Half/Cham): (123.16 ± 6.63 N) and Group (Half/Bev): (123.75 ± 6.12 N) had significantly the lowest values with insignificant difference between them. All teeth with half incisal edge fracture revealed restorable fractures, while with full incisal edge fracture the percentage dropped to third (33.3%). Conclusions. In full incisal edge fractures, chamfer design had better fracture resistance than bevel design. While in half incisal edge fractures, both designs had similar fracture resistance and restorable mode of failure. Clinical Relevance. The innovative chamfer and bevel designs of partial laminate veneers can be used as a highly conservative approach to restore anterior teeth with full or half fractured incisal edge.
{"title":"Effect of Preparation Design on the Fracture Resistance of Partial Laminate Veneers. An In-vitro Study","authors":"Omnia Nabil, A. S. Idris","doi":"10.21608/edj.2024.290406.3041","DOIUrl":"https://doi.org/10.21608/edj.2024.290406.3041","url":null,"abstract":"Objectives. To evaluate the effect of two preparation designs of partial laminate veneers on the fracture resistance of anterior teeth with full and half incisal edge fracture. Materials and Methods. 48 upper central incisors were divided into four equal groups: two groups simulated completely fractured incisal edge: Group (Full/Cham): with chamfer design and Group (Full/Bev): with bevel design and two groups simulated half fractured incisal edge: Group (Half/Cham): with chamfer design and Group (Half/Bev): with bevel design. Lithium disilicate partial veneers were constructed and cemented using light-curing resin cement. All samples were mounted on universal testing machine to test their fracture resistance. Fractured samples were categorized as restorable or non-restorable based on the crack/fracture extension relative to the cemento-enamel junction. Results. Group (Full/Cham): (361.05 ± 11.39 N) had significantly the highest fracture resistance, followed by Group (Full/Bev): (207.1 ± 10.85 N), while Group (Half/Cham): (123.16 ± 6.63 N) and Group (Half/Bev): (123.75 ± 6.12 N) had significantly the lowest values with insignificant difference between them. All teeth with half incisal edge fracture revealed restorable fractures, while with full incisal edge fracture the percentage dropped to third (33.3%). Conclusions. In full incisal edge fractures, chamfer design had better fracture resistance than bevel design. While in half incisal edge fractures, both designs had similar fracture resistance and restorable mode of failure. Clinical Relevance. The innovative chamfer and bevel designs of partial laminate veneers can be used as a highly conservative approach to restore anterior teeth with full or half fractured incisal edge.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141695509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.271428.2952
shaimaa Rabee Ali, Rana M Sherif, Rasha nabil sami
Objective: Evaluate the color change and surface roughness of reinforced composite (BRILIANT CRIOS) after immersion in artificial saliva then acidic beverage (Pepsi). Materials & Methods: Samples from reinforced composite (BRILIANT CRIOS) were immersed in artificial saliva and acidic beverage (Pepsi). A total of 23 samples were prepared 1mm in thickness and (14 × 12 × 18 (mm) in dimensions. The average color change (Delta E*) was computed following immersion in artificial saliva and an acidic beverage. Using spectrophotometer analysis, color parameters were assessed both before and after the immersion. The surface roughness was measured with a non-contact profilometer. The Shapiro-Wilk test was used for statistical analysis. Data had a parametric distribution, thus we used repeated measures ANOVA and the Bonferroni post hoc test to examine them. The significance level was set at P ≤ 0.05. Results: showed that the color change of Brilliant Crios samples immersed in Pepsi ΔE 2 was significantly higher than artificial saliva ΔE 1 while Pepsi samples had the highest surface roughness rating, followed by baseline samples, while artificial saliva samples had the lowest value. Conclusion: reinforced composite (BRILIANT CRIOS) samples showed color changes above the clinical acceptable limit when immersed in artificial saliva and Pepsi in comparison to surface roughness beyond the clinically acceptable level after immersion in acidic beverage (Pepsi).
{"title":"EVALUATION OF THE COLOR CHANGE AND SURFACE ROUGHNESS OF REINFORCED COMPOSITE (BRILIANT CRIOS) AFTER IMMERSION IN ACIDIC BEVERAGE: AN IN-VITRO STUDY","authors":"shaimaa Rabee Ali, Rana M Sherif, Rasha nabil sami","doi":"10.21608/edj.2024.271428.2952","DOIUrl":"https://doi.org/10.21608/edj.2024.271428.2952","url":null,"abstract":"Objective: Evaluate the color change and surface roughness of reinforced composite (BRILIANT CRIOS) after immersion in artificial saliva then acidic beverage (Pepsi). Materials & Methods: Samples from reinforced composite (BRILIANT CRIOS) were immersed in artificial saliva and acidic beverage (Pepsi). A total of 23 samples were prepared 1mm in thickness and (14 × 12 × 18 (mm) in dimensions. The average color change (Delta E*) was computed following immersion in artificial saliva and an acidic beverage. Using spectrophotometer analysis, color parameters were assessed both before and after the immersion. The surface roughness was measured with a non-contact profilometer. The Shapiro-Wilk test was used for statistical analysis. Data had a parametric distribution, thus we used repeated measures ANOVA and the Bonferroni post hoc test to examine them. The significance level was set at P ≤ 0.05. Results: showed that the color change of Brilliant Crios samples immersed in Pepsi ΔE 2 was significantly higher than artificial saliva ΔE 1 while Pepsi samples had the highest surface roughness rating, followed by baseline samples, while artificial saliva samples had the lowest value. Conclusion: reinforced composite (BRILIANT CRIOS) samples showed color changes above the clinical acceptable limit when immersed in artificial saliva and Pepsi in comparison to surface roughness beyond the clinically acceptable level after immersion in acidic beverage (Pepsi).","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141710839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.21608/edj.2024.288919.3037
Heba Ismail, M. Wahsh, A. Aboelfadl, Ingy Nouh
Objectives: The aim of this in-vitro study was to investigate the marginal and internal adaptation of two screw-retained crowns; lithium disilicate and BioHPP using direct optical and subtractive reverse engineering techniques and to calculate the degree of agreement between them. Materials & Methods: Twenty-eight implant analogs were embedded perpendicularly in an auto-polymerizing resin. Implant-supported restorations were designed then milled with CAD wax and divided into 2 groups according to material (n=14): Lithium disilicate and BioHPP. Each group was pressed according to the manufacturer’s instructions. The marginal and internal adaptation of the specimens were analyzed using DOT & subtractive RET. Data were explored for normality using Shapiro-Wilk’s and Levene’s tests and were analyzed using independent and paired t-test for inter and intragroup comparisons respectively with a significance level of p<0.05. Agreement analysis was done using intraclass correlation coefficient (ICC). Results: BioHPP screw-retained implant-supported crowns showed higher marginal gap than lithium disilicate, yet the difference was non-significant when measured using DOT, while it was significant when measured using sRET. Calculated agreement between the two techniques at the marginal level showed that there was a statistically significant moderate agreement between both methods. Regarding internal adpatation, BioHPP had a statistically significant higher internal gap than lithium disilicate group. Conclusions: Supra-structure material affected marginal and internal adaptation of implant-supported restorations. Pressed lithium disilicate crowns showed better marginal and internal adaptation than BioHPP crowns, however, both groups showed clinically acceptable results. DOT and RET were both relevant and showed moderate agreement between them.
研究目的这项体外研究的目的是使用直接光学和减法逆向工程技术研究两种螺钉固位牙冠（二硅酸锂和 BioHPP）的边缘和内部适应性，并计算它们之间的一致程度。材料与方法：将 28 个种植体模拟体垂直嵌入自动聚合树脂中。设计种植体支持的修复体，然后用 CAD 蜡进行研磨，并根据材料分为两组（n=14）：二硅酸锂和 BioHPP。每组均按照制造商的说明进行压制。使用 DOT 和减法 RET 分析试样的边缘和内部适应性。使用 Shapiro-Wilk 检验和 Levene 检验对数据进行正态性检验，并分别使用独立 t 检验和配对 t 检验对组间和组内比较进行分析，显著性水平为 p<0.05。采用类内相关系数（ICC）进行一致性分析。结果BioHPP螺钉固位种植体支持冠的边缘间隙高于二硅酸锂冠，但使用DOT测量时差异不显著，而使用sRET测量时差异显著。对两种技术在边缘水平上的一致性进行计算后发现，这两种方法在统计学上具有显著的中度一致性。在内部间隙方面，BioHPP 的内部间隙在统计学上明显高于二硅酸锂组。结论上部结构材料会影响种植体支持修复体的边缘和内部适应性。与 BioHPP 冠相比，压制二硅酸锂冠显示出更好的边缘和内部适应性，但两组都显示出临床可接受的结果。DOT 和 RET 都具有相关性，而且两者之间的一致性适中。
{"title":"In Vitro Investigation of Marginal & Internal Adaptation of Two Screw-Retained Implant Supported Crowns: A Comparative Analysis of Direct Optical & Subtractive Reverse Engineering Techniques.","authors":"Heba Ismail, M. Wahsh, A. Aboelfadl, Ingy Nouh","doi":"10.21608/edj.2024.288919.3037","DOIUrl":"https://doi.org/10.21608/edj.2024.288919.3037","url":null,"abstract":"Objectives: The aim of this in-vitro study was to investigate the marginal and internal adaptation of two screw-retained crowns; lithium disilicate and BioHPP using direct optical and subtractive reverse engineering techniques and to calculate the degree of agreement between them. Materials & Methods: Twenty-eight implant analogs were embedded perpendicularly in an auto-polymerizing resin. Implant-supported restorations were designed then milled with CAD wax and divided into 2 groups according to material (n=14): Lithium disilicate and BioHPP. Each group was pressed according to the manufacturer’s instructions. The marginal and internal adaptation of the specimens were analyzed using DOT & subtractive RET. Data were explored for normality using Shapiro-Wilk’s and Levene’s tests and were analyzed using independent and paired t-test for inter and intragroup comparisons respectively with a significance level of p<0.05. Agreement analysis was done using intraclass correlation coefficient (ICC). Results: BioHPP screw-retained implant-supported crowns showed higher marginal gap than lithium disilicate, yet the difference was non-significant when measured using DOT, while it was significant when measured using sRET. Calculated agreement between the two techniques at the marginal level showed that there was a statistically significant moderate agreement between both methods. Regarding internal adpatation, BioHPP had a statistically significant higher internal gap than lithium disilicate group. Conclusions: Supra-structure material affected marginal and internal adaptation of implant-supported restorations. Pressed lithium disilicate crowns showed better marginal and internal adaptation than BioHPP crowns, however, both groups showed clinically acceptable results. DOT and RET were both relevant and showed moderate agreement between them.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141702272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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