Pub Date : 2024-04-01DOI: 10.21608/edj.2024.251395.2803
K. Kamel
Objective: This study was carried out to assess the effect of self-etch vs etch & rinse dental adhesives and thermocycling on the shear bond strength (SBS) of bulk and incremental resin composite. Materials and Methods: A total of forty sound extracted human molars were used in current study and were equally divided into two main groups (20 each) according to filling technique; bulk and incremental technique. Each group was subdivided into 2 subgroups (10 each) according to bonding systems. Each subgroup was divided into two divisions (5 each) according to thermo-cycling. Results: There was no statistically significant difference between shear bond strength of the two resin composite technique with etch and rinse bonding system as regards non-thermo-cycled specimens. Similarly, with thermo-cycled specimens; there was no statistically significant difference between shear bond strength of the two resin composite technique. The bulk fill resin composite showed statistically significantly higher shear bond strength than incremental resin composite with self-etch bonding system and non-thermocycled specimens. While with thermocycled specimens; there was no statistically significant difference between shear bond strength of the two resin composite technique. Conclusion
{"title":"The Effect of Thermo-cycling on Macro Shear Bond Strength of Bulk Fill and Incremental Resin Composite Using Two Different Bonding Systems","authors":"K. Kamel","doi":"10.21608/edj.2024.251395.2803","DOIUrl":"https://doi.org/10.21608/edj.2024.251395.2803","url":null,"abstract":"Objective: This study was carried out to assess the effect of self-etch vs etch & rinse dental adhesives and thermocycling on the shear bond strength (SBS) of bulk and incremental resin composite. Materials and Methods: A total of forty sound extracted human molars were used in current study and were equally divided into two main groups (20 each) according to filling technique; bulk and incremental technique. Each group was subdivided into 2 subgroups (10 each) according to bonding systems. Each subgroup was divided into two divisions (5 each) according to thermo-cycling. Results: There was no statistically significant difference between shear bond strength of the two resin composite technique with etch and rinse bonding system as regards non-thermo-cycled specimens. Similarly, with thermo-cycled specimens; there was no statistically significant difference between shear bond strength of the two resin composite technique. The bulk fill resin composite showed statistically significantly higher shear bond strength than incremental resin composite with self-etch bonding system and non-thermocycled specimens. While with thermocycled specimens; there was no statistically significant difference between shear bond strength of the two resin composite technique. Conclusion","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"133 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140762173","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 : 2024-04-01DOI: 10.21608/edj.2024.270724.2949
Mohamed Said
Aim: To compare the effect of nylon versus polyetheretherketone (PEEK) retentive insert of locator attachments on peri-implant bone loss in mandibular implant overdenture. Materials and methods: Completely edentulous patients, with two implants locator attachment for mandibular overdenture were recalled for this study. Patients were divided into two groups: Group I: overdenture retained by locator attachment using nylon retentive male insert, and Group II: overdenture retained by locator attachment with PEEK retentive male insert. Digital periapical radiographs were conducted to capture images of dental implants using a long-cone paralleling technique. Images taken immediately (baseline) and 24 months after loading were used for this study to measure the vertical bone loss (VBL) and horizontal bone loss (HBL). It was considered statistically significant when P value was less than 0.05. Results: Twenty-four dental implants were placed in twelve patients aged between 52 and 65 years, comprising 7 men and 5 women. There were no instances of implant loss in either group from the time of placement through prosthetic delivery up to the two-year follow-up period. Group I recorded significant lower VBL than Group II after 24 months of loading (P < 0.05). On the other hand, there was no significant differences in HBL between the two groups (P > 0.05). Conclusion: Implant overdentures retained by PEEK insert did cause more peri-implant bone loss when compared to those retained with nylon inserts; however further studies are needed to validate these results.
{"title":"Comparison of peri-implant bone level in mandibular implant overdenture retained by locator attachment with varying retentive insert materials: A retrospective study","authors":"Mohamed Said","doi":"10.21608/edj.2024.270724.2949","DOIUrl":"https://doi.org/10.21608/edj.2024.270724.2949","url":null,"abstract":"Aim: To compare the effect of nylon versus polyetheretherketone (PEEK) retentive insert of locator attachments on peri-implant bone loss in mandibular implant overdenture. Materials and methods: Completely edentulous patients, with two implants locator attachment for mandibular overdenture were recalled for this study. Patients were divided into two groups: Group I: overdenture retained by locator attachment using nylon retentive male insert, and Group II: overdenture retained by locator attachment with PEEK retentive male insert. Digital periapical radiographs were conducted to capture images of dental implants using a long-cone paralleling technique. Images taken immediately (baseline) and 24 months after loading were used for this study to measure the vertical bone loss (VBL) and horizontal bone loss (HBL). It was considered statistically significant when P value was less than 0.05. Results: Twenty-four dental implants were placed in twelve patients aged between 52 and 65 years, comprising 7 men and 5 women. There were no instances of implant loss in either group from the time of placement through prosthetic delivery up to the two-year follow-up period. Group I recorded significant lower VBL than Group II after 24 months of loading (P < 0.05). On the other hand, there was no significant differences in HBL between the two groups (P > 0.05). Conclusion: Implant overdentures retained by PEEK insert did cause more peri-implant bone loss when compared to those retained with nylon inserts; however further studies are needed to validate these results.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"212 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140773742","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 : 2024-04-01DOI: 10.21608/edj.2024.258200.2850
Amr Elshahawy, Laila Ragab, Mohamed Ellayeh, A. Elkashty
Purpose: Assessment the efficacy of platelet rich fibrin (PRF) with delayed short dental implants placement clinically and radiographically. Methods: This study was a comparative clinical study, with 16 short dental implants were used in the posterior edentulous region. Cases were distributed into two groups, the study group who had lost posterior teeth to be restored with short dental implant, while the the control group who were looking for missed molar restoration also. The study group patients have received short dental implant with PRF membrane surrounding it. On the other hand, the control group patients received short dental implants without PRF placement. Prosthetic procedures started after three months, with the assessment of different clinical indices including; modified plaque index (mPI), Osstell device to assess osseointegration, peri-implant probing depth index (PPDI) and the crestal bone loss (CBL). Also the crestal bone surrounding short implants was assessed after placement immediately (T0) using periapical digital x-ray with parallel technique and re-evaluated at the time of the prosthetic phase (T3) again. Later on, all of these indices were re-evaluated for second time after three months (T6). Results: At recent clinical study it was found that the study group patients with PRF around the placed short dental implant got better clinical and radiographical parameters than that of the control group patients without PRF surrounding the short dental implants. Conclusions: PRF can be used around the short dental implants to decrease the crestal bone loss and enhance soft and hard tissue healing surrounding short dental implants.
{"title":"Clinical and Radiographical Assessment of the Role of Platelet Rich Fibrin with Delayed Short Dental Implants Placement (Comparative Clinical Study)","authors":"Amr Elshahawy, Laila Ragab, Mohamed Ellayeh, A. Elkashty","doi":"10.21608/edj.2024.258200.2850","DOIUrl":"https://doi.org/10.21608/edj.2024.258200.2850","url":null,"abstract":"Purpose: Assessment the efficacy of platelet rich fibrin (PRF) with delayed short dental implants placement clinically and radiographically. Methods: This study was a comparative clinical study, with 16 short dental implants were used in the posterior edentulous region. Cases were distributed into two groups, the study group who had lost posterior teeth to be restored with short dental implant, while the the control group who were looking for missed molar restoration also. The study group patients have received short dental implant with PRF membrane surrounding it. On the other hand, the control group patients received short dental implants without PRF placement. Prosthetic procedures started after three months, with the assessment of different clinical indices including; modified plaque index (mPI), Osstell device to assess osseointegration, peri-implant probing depth index (PPDI) and the crestal bone loss (CBL). Also the crestal bone surrounding short implants was assessed after placement immediately (T0) using periapical digital x-ray with parallel technique and re-evaluated at the time of the prosthetic phase (T3) again. Later on, all of these indices were re-evaluated for second time after three months (T6). Results: At recent clinical study it was found that the study group patients with PRF around the placed short dental implant got better clinical and radiographical parameters than that of the control group patients without PRF surrounding the short dental implants. Conclusions: PRF can be used around the short dental implants to decrease the crestal bone loss and enhance soft and hard tissue healing surrounding short dental implants.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"551 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140776310","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 : 2024-04-01DOI: 10.21608/edj.2023.257069.2840
Ahmad Abdulrahman, A. Abuelezz, Nihal Sabet
Background: When a treatment failure is discovered following a clinical or radiographic evaluation, an endodontic retreatment process is carried out. The most significant etiological causes for failures are the existence of residual germs or re-infection in endodontically treated teeth. Aim: To assess the efficacy of rotary and reciprocation kinematic movements of two different nickel titanium systems in the retreatment of oval canals by evaluation of the amount of remaining gutta-percha with or without solvent as well as crack formation using Edge XR and Reciproc Blue files . Materials and Methods : Thirty-five non-carious extracted human lower second premolars with single straight oval canals will be selected. The occlusal table of the samples will be flattened to achieve a standardized tooth length. They will be randomly divided according to the retreatment system used. Group 1: Edge File XR with solvent, Group2: Edge XR file without solvent, Group 3: Reciproc Blue R25 with solvent, Group 4: Reciproc Blue R25 without solvent. The remaining amount of root canal filling material and evaluation of crack formation will be measured by stereomicroscope. Results: More filling material was observed in the apical third, and there were no notable differences in the percentage of remaining filling materials and working time among the four groups. Conclusion: Achieving the thorough removal of root canal filling material from oval root canals has proven to be challenging with any retreatment approach. Additionally, neither of the kinematics resulted in the occurrence of cracks during the retreatment procedure in oval root canals.
背景：当临床或放射学评估后发现治疗失败时，就需要进行牙髓再治疗。失败的最主要病因是残留病菌或牙髓治疗后牙齿的再次感染。目的：评估两种不同镍钛系统的旋转和往复运动在椭圆形根管再治疗中的功效，方法是使用 Edge XR 和 Reciproc Blue 锉刀，在有溶剂或无溶剂的情况下，评估剩余的水门汀胶量以及裂缝的形成。材料和方法：选取 35 颗未龋坏的人类下第二前磨牙，它们带有单直椭圆形根管。样本的咬合台将被压平，以获得标准的牙齿长度。根据所使用的再治疗系统将它们随机分成两组。第 1 组：Edge File XR（含溶剂）；第 2 组：Edge XR File（不含溶剂）；第 3 组：Reciproc Blue R25（含溶剂）；第 4 组：Reciproc Blue R25（不含溶剂）。用体视显微镜测量根管填充材料的剩余量并评估裂缝的形成情况。结果在根尖三分之一处观察到更多的填充材料，四组之间在剩余填充材料的百分比和工作时间上没有明显差异。结论事实证明，任何再治疗方法都难以彻底清除椭圆形根管中的填充材料。此外，在椭圆形根管的再治疗过程中，这两种运动学方法都不会导致裂缝的出现。
{"title":"The Efficacy of Different Retreatment Protocols in the Removal of Root Canal Filling Materials from Oval Root Canal (An In-vitro Study)","authors":"Ahmad Abdulrahman, A. Abuelezz, Nihal Sabet","doi":"10.21608/edj.2023.257069.2840","DOIUrl":"https://doi.org/10.21608/edj.2023.257069.2840","url":null,"abstract":"Background: When a treatment failure is discovered following a clinical or radiographic evaluation, an endodontic retreatment process is carried out. The most significant etiological causes for failures are the existence of residual germs or re-infection in endodontically treated teeth. Aim: To assess the efficacy of rotary and reciprocation kinematic movements of two different nickel titanium systems in the retreatment of oval canals by evaluation of the amount of remaining gutta-percha with or without solvent as well as crack formation using Edge XR and Reciproc Blue files . Materials and Methods : Thirty-five non-carious extracted human lower second premolars with single straight oval canals will be selected. The occlusal table of the samples will be flattened to achieve a standardized tooth length. They will be randomly divided according to the retreatment system used. Group 1: Edge File XR with solvent, Group2: Edge XR file without solvent, Group 3: Reciproc Blue R25 with solvent, Group 4: Reciproc Blue R25 without solvent. The remaining amount of root canal filling material and evaluation of crack formation will be measured by stereomicroscope. Results: More filling material was observed in the apical third, and there were no notable differences in the percentage of remaining filling materials and working time among the four groups. Conclusion: Achieving the thorough removal of root canal filling material from oval root canals has proven to be challenging with any retreatment approach. Additionally, neither of the kinematics resulted in the occurrence of cracks during the retreatment procedure in oval root canals.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"45 52","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140796398","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 : 2024-04-01DOI: 10.21608/edj.2024.273175.2960
Sara Bih, M. Zohdy, S. Foudah, Engy Farag
{"title":"Influence of Thickness of Endocrown and Ceramic Translucency on The Degree of Conversion of Resin Cement (In Vitro Study)","authors":"Sara Bih, M. Zohdy, S. Foudah, Engy Farag","doi":"10.21608/edj.2024.273175.2960","DOIUrl":"https://doi.org/10.21608/edj.2024.273175.2960","url":null,"abstract":"","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"93 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140785673","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 : 2024-04-01DOI: 10.21608/edj.2024.260280.2860
Ingy Nouh, Nancy Rafla, Omar El Sergany
Objective: This study evaluated the effect of layer thickness, model inner structure, and implant angulation on the accuracy of 3D printed models with repositional analogs. Materials and methods : 126 models designed to receive all-on-4 implant retained fixed dental prosthesis were 3D printed. Models were divided into 2 groups (n=63) according to posterior implant angulation (Group 1; 30˚ and group 2;45˚). The models were then divided into three sub-groups (n=21) according to the printing layer thickness (Group a; 50 µm, group b; 100 µm, and group c; 150 µm). Each subgroup was later subdivided into 3 divisions (n=7) according to the model inner structure (Group I; solid, group II; hollow, and group III; honeycomb). Trueness was analyzed using Geomagic controlX analysis software by comparing the model scans to the reference model STL file. Results: Both inner structure and layer thickness had a significant effect on the final accuracy (p<0.001). Distal implant angulation had no effect on the final accuracy of the printed model (p=0.968). Regarding layer thickness, tukeys post-hoc test revealed that both 100 µm (24.9 ± 2.4) and 150 µm (24.5 ± 1.1) layer thickness showed higher accuracy than the 50 µm (27.9 ± 2.4) layer thickness. As for model form, tukeys post hoc test revealed that the solid (24.9 ± 1.4) and honey-comb (25 ± 1.5) models were more accurate than the hollow models (27.5±3.3). Conclusion: Implant angulation had no effect on the final accuracy of the model. Both 50 µm print layer thickness and hollow model inner structure showed the least accuracy. Clinical relevance: Printing layer thickness of 100 to 150 µm with a solid or honeycomb model inner form will provide the best 3D positional accuracy for implant analogs
{"title":"Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs","authors":"Ingy Nouh, Nancy Rafla, Omar El Sergany","doi":"10.21608/edj.2024.260280.2860","DOIUrl":"https://doi.org/10.21608/edj.2024.260280.2860","url":null,"abstract":"Objective: This study evaluated the effect of layer thickness, model inner structure, and implant angulation on the accuracy of 3D printed models with repositional analogs. Materials and methods : 126 models designed to receive all-on-4 implant retained fixed dental prosthesis were 3D printed. Models were divided into 2 groups (n=63) according to posterior implant angulation (Group 1; 30˚ and group 2;45˚). The models were then divided into three sub-groups (n=21) according to the printing layer thickness (Group a; 50 µm, group b; 100 µm, and group c; 150 µm). Each subgroup was later subdivided into 3 divisions (n=7) according to the model inner structure (Group I; solid, group II; hollow, and group III; honeycomb). Trueness was analyzed using Geomagic controlX analysis software by comparing the model scans to the reference model STL file. Results: Both inner structure and layer thickness had a significant effect on the final accuracy (p<0.001). Distal implant angulation had no effect on the final accuracy of the printed model (p=0.968). Regarding layer thickness, tukeys post-hoc test revealed that both 100 µm (24.9 ± 2.4) and 150 µm (24.5 ± 1.1) layer thickness showed higher accuracy than the 50 µm (27.9 ± 2.4) layer thickness. As for model form, tukeys post hoc test revealed that the solid (24.9 ± 1.4) and honey-comb (25 ± 1.5) models were more accurate than the hollow models (27.5±3.3). Conclusion: Implant angulation had no effect on the final accuracy of the model. Both 50 µm print layer thickness and hollow model inner structure showed the least accuracy. Clinical relevance: Printing layer thickness of 100 to 150 µm with a solid or honeycomb model inner form will provide the best 3D positional accuracy for implant analogs","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140785769","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 : 2024-04-01DOI: 10.21608/edj.2024.261221.2870
Sara Mohamed, S. Amgad, Ahmed Bakry
Aim: This study aimed to determine the repressing impact of Celtra and GC with varying weight percentages on color, translucency using the spectrophotometer, and the effect of immersion in different types of media of ceramic discs. Materials and Methods: Sixty ceramic disc-shaped samples were constructed by heat pressing technique. All samples were split into two groups based on the kind of ceramic material. Group G :GC lisi press , and Group C: Celtra press . then split up into five subgroups based on the repressing weight percentage into : 100% new, 75% new and 25% repressed ceramic, 50% new and 50% repressed ceramic, 25% new and 75% repressed ceramic,100% repressed ceramic. Further, each subgroup samples were classified into two classes according to the immersion solution, Class L: lemon juice, Class T: green tea All samples subjected to measure the translucency and color change before and after immersion. Results: Ceramic type, and Immersion medium had a statistically significant impact on mean Change in color, repressing wight percentage had no statistically significant impact on mean ΔE, repressing weight percentage, immersion, and immersion medium had a statistically significant impact on mean translucency parameter (TP). There was a statistically significant difference between the mean TP of different repressing weight percentages. Green tea indicated statistically significantly less mean TP than lemon juice. Conclusion: Ceramic type and immersion medium had a significant effect on both color and translucency, the mix of new ingot with repressed ceramic are in the clinical acceptance range as regard ΔE.
{"title":"Assessment of ceramic repressing effect on color and translucency of pressable ceramic materials","authors":"Sara Mohamed, S. Amgad, Ahmed Bakry","doi":"10.21608/edj.2024.261221.2870","DOIUrl":"https://doi.org/10.21608/edj.2024.261221.2870","url":null,"abstract":"Aim: This study aimed to determine the repressing impact of Celtra and GC with varying weight percentages on color, translucency using the spectrophotometer, and the effect of immersion in different types of media of ceramic discs. Materials and Methods: Sixty ceramic disc-shaped samples were constructed by heat pressing technique. All samples were split into two groups based on the kind of ceramic material. Group G :GC lisi press , and Group C: Celtra press . then split up into five subgroups based on the repressing weight percentage into : 100% new, 75% new and 25% repressed ceramic, 50% new and 50% repressed ceramic, 25% new and 75% repressed ceramic,100% repressed ceramic. Further, each subgroup samples were classified into two classes according to the immersion solution, Class L: lemon juice, Class T: green tea All samples subjected to measure the translucency and color change before and after immersion. Results: Ceramic type, and Immersion medium had a statistically significant impact on mean Change in color, repressing wight percentage had no statistically significant impact on mean ΔE, repressing weight percentage, immersion, and immersion medium had a statistically significant impact on mean translucency parameter (TP). There was a statistically significant difference between the mean TP of different repressing weight percentages. Green tea indicated statistically significantly less mean TP than lemon juice. Conclusion: Ceramic type and immersion medium had a significant effect on both color and translucency, the mix of new ingot with repressed ceramic are in the clinical acceptance range as regard ΔE.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"54 52","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140796139","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 : 2024-04-01DOI: 10.21608/edj.2024.256882.2837
Rasha Mahfouz, Manal Abdelbaky, Mohamed Omaia
Objective: The aim of the current study is to evaluate the cytotoxic effect of MTA Bioseal root canal sealer (Itena-clinical, Villepinte, France) with AH + epoxy resin-based sealer (Dentsply Sirona, Germany) and ADSEAL resin sealer (Meta Biomed, Korea). Methods: In sterile test tubes, the tested sealers were consecutively diluted twice. To evaluate the proper concentration where fibroblast cells would survive, extraction media were tempered many times using cell Dulbecco’s Modified Eagle’s Medium (DMEM) following the ISO standards. The cytotoxic effect of concentrations used in the present study (12.5%, 25%, 50%, and 100%) were evaluated by Methyl Thiazol Tetrazolium (MTT) essay after 24, 72 hours, and one week using a human fibroblast cell line. Statistical analysis was performed by using One Way ANOVA test, followed by Tukey`s Post Hoc test for multiple comparisons. Results: AH Plus and MTA Bioseal showed generally similar behavior. The highest cytotoxicity was recorded for both sealers at conc.100mg/ml in the first 24 hours. Afterwards the mean percentage of cell viability increased progressively with the decrease in concentration. While ADSEAL showed a nearly constant cytotoxicity that is insignificantly affected by the time factor at the four experimental concentrations used in the study. Conclusion : AH Plus had the lowest cytotoxic effect followed by MTA Bioseal. However, both sealers showed parallel behavior of decreased cytotoxicity with increasing test time period. While ADSEAL had the highest cytotoxicity with statistically insignificant effect of time intervals or concentrations.
研究目的本研究旨在评估 MTA Bioseal 根管封闭剂（Itena-clinical，法国维勒班特）与 AH + 环氧树脂基封闭剂（Dentsply Sirona，德国）和 ADSEAL 树脂封闭剂（Meta Biomed，韩国）的细胞毒性作用。方法：在无菌试管中，将测试的封闭剂连续稀释两次。为了评估成纤维细胞存活的适当浓度，按照 ISO 标准使用细胞杜氏改良鹰培养基（DMEM）对提取介质进行了多次调温。本研究中使用的浓度（12.5%、25%、50% 和 100%）的细胞毒性效果是通过甲基噻唑四唑（MTT）论文在 24 小时、72 小时和一周后使用人成纤维细胞系进行评估的。采用单向方差分析进行统计分析，然后采用 Tukey`s Post Hoc 检验进行多重比较。结果AH Plus 和 MTA Bioseal 的表现基本相似。在浓度为 100 毫克/毫升时，两种密封剂在最初 24 小时内的细胞毒性最高。之后，细胞存活率的平均百分比随着浓度的降低而逐渐增加。而 ADSEAL 的细胞毒性几乎恒定，在研究中使用的四种实验浓度下，其细胞毒性受时间因素的影响不大。结论：AH Plus 的细胞毒性效果最低，其次是 MTA Bioseal。不过，这两种封闭剂的细胞毒性都随着试验时间的延长而降低。而 ADSEAL 的细胞毒性最高，但时间间隔或浓度的影响在统计学上并不显著。
{"title":"A Laboratory Comparative Study of the Cytotoxic Effect of Bioceramic and Resin Based Root Canal Sealers","authors":"Rasha Mahfouz, Manal Abdelbaky, Mohamed Omaia","doi":"10.21608/edj.2024.256882.2837","DOIUrl":"https://doi.org/10.21608/edj.2024.256882.2837","url":null,"abstract":"Objective: The aim of the current study is to evaluate the cytotoxic effect of MTA Bioseal root canal sealer (Itena-clinical, Villepinte, France) with AH + epoxy resin-based sealer (Dentsply Sirona, Germany) and ADSEAL resin sealer (Meta Biomed, Korea). Methods: In sterile test tubes, the tested sealers were consecutively diluted twice. To evaluate the proper concentration where fibroblast cells would survive, extraction media were tempered many times using cell Dulbecco’s Modified Eagle’s Medium (DMEM) following the ISO standards. The cytotoxic effect of concentrations used in the present study (12.5%, 25%, 50%, and 100%) were evaluated by Methyl Thiazol Tetrazolium (MTT) essay after 24, 72 hours, and one week using a human fibroblast cell line. Statistical analysis was performed by using One Way ANOVA test, followed by Tukey`s Post Hoc test for multiple comparisons. Results: AH Plus and MTA Bioseal showed generally similar behavior. The highest cytotoxicity was recorded for both sealers at conc.100mg/ml in the first 24 hours. Afterwards the mean percentage of cell viability increased progressively with the decrease in concentration. While ADSEAL showed a nearly constant cytotoxicity that is insignificantly affected by the time factor at the four experimental concentrations used in the study. Conclusion : AH Plus had the lowest cytotoxic effect followed by MTA Bioseal. However, both sealers showed parallel behavior of decreased cytotoxicity with increasing test time period. While ADSEAL had the highest cytotoxicity with statistically insignificant effect of time intervals or concentrations.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"64 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140795091","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 : 2024-04-01DOI: 10.21608/edj.2024.267104.2916
Namies Yousri, Noha Sabet, Islam Hassan, Marwah Abd El Latief
{"title":"Assessment of Prolonged Effect of Repeated Botulinum Toxin-A Injection for Gummy Smile Correction","authors":"Namies Yousri, Noha Sabet, Islam Hassan, Marwah Abd El Latief","doi":"10.21608/edj.2024.267104.2916","DOIUrl":"https://doi.org/10.21608/edj.2024.267104.2916","url":null,"abstract":"","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"62 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140356494","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 : 2024-04-01DOI: 10.21608/edj.2024.263909.2888
Hanan Reda
This prospective case series study aimed to evaluate the accuracy of computer assisted surgical guide in preserving inferior alveolar nerve during harvesting bone graft. The study’s variables included the precision of CBCT scans to identify the position of IAN and their distance away from the autogenous bone graft and the amount of bone available over IAN at external oblique ridge (EOR). The study included six patients with alveolar ridge deficiency that required alveolar ridge augmentation. The surgical guides were properly seated in all patients, except in one patient, in which the guide needed adjustment using stone bur to get well seated and the surgical procedure was completed as usual. The mean harvesting time for all the cases was 17.3 ± 4.1 minutes. The postoperative neurosensory function of the IAN was evaluated based on subjective and objective tests. Using sharp/blunt discrimination test, light touch test and VAS, it was found that all patients (100.0%) had normal sensation from the first week.
这项前瞻性病例系列研究旨在评估计算机辅助手术指南在取骨过程中保留下牙槽神经的准确性。研究变量包括 CBCT 扫描确定下牙槽神经位置的精确度及其与自体骨移植的距离，以及下牙槽神经外斜嵴（EOR）上可用的骨量。该研究包括六名需要进行牙槽嵴增高术的牙槽嵴缺损患者。所有患者的手术导板都已正确就位，只有一名患者的导板需要使用砭石毛刺进行调整才能就位，手术过程照常进行。所有病例的平均采集时间为（17.3 ± 4.1）分钟。根据主观和客观测试对 IAN 的术后神经感觉功能进行了评估。通过利器/钝器分辨测试、轻触测试和 VAS，发现所有患者（100.0%）从第一周起感觉正常。
{"title":"Evaluation of computer assisted surgical guide in preserving inferior alveolar nerve during harvesting bone graft","authors":"Hanan Reda","doi":"10.21608/edj.2024.263909.2888","DOIUrl":"https://doi.org/10.21608/edj.2024.263909.2888","url":null,"abstract":"This prospective case series study aimed to evaluate the accuracy of computer assisted surgical guide in preserving inferior alveolar nerve during harvesting bone graft. The study’s variables included the precision of CBCT scans to identify the position of IAN and their distance away from the autogenous bone graft and the amount of bone available over IAN at external oblique ridge (EOR). The study included six patients with alveolar ridge deficiency that required alveolar ridge augmentation. The surgical guides were properly seated in all patients, except in one patient, in which the guide needed adjustment using stone bur to get well seated and the surgical procedure was completed as usual. The mean harvesting time for all the cases was 17.3 ± 4.1 minutes. The postoperative neurosensory function of the IAN was evaluated based on subjective and objective tests. Using sharp/blunt discrimination test, light touch test and VAS, it was found that all patients (100.0%) had normal sensation from the first week.","PeriodicalId":11504,"journal":{"name":"Egyptian dental journal","volume":"20 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140353730","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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