Egyptian dental journal最新文献_第10页

The Effect of Thermo-cycling on Macro Shear Bond Strength of Bulk Fill and Incremental Resin Composite Using Two Different Bonding Systems 热循环对使用两种不同粘接体系的块状填充和增量树脂复合材料宏观剪切粘接强度的影响

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.251395.2803

K. Kamel

{"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":null,"pages":null},"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}

引用次数: 0

Comparison of peri-implant bone level in mandibular implant overdenture retained by locator attachment with varying retentive insert materials: A retrospective study 使用不同固位材料的定位器固位的下颌种植体覆盖义齿种植体周围骨水平的比较：回顾性研究

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.270724.2949

Mohamed Said

{"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":null,"pages":null},"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}

引用次数: 0

Clinical and Radiographical Assessment of the Role of Platelet Rich Fibrin with Delayed Short Dental Implants Placement (Comparative Clinical Study) 富血小板纤维蛋白在延迟短牙种植体植入中的作用的临床和放射学评估（比较临床研究）

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.258200.2850

Amr Elshahawy, Laila Ragab, Mohamed Ellayeh, A. Elkashty

{"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":null,"pages":null},"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}

引用次数: 0

The Efficacy of Different Retreatment Protocols in the Removal of Root Canal Filling Materials from Oval Root Canal (An In-vitro Study) 不同再处理方案对去除椭圆形根管中根管填充材料的功效（体外研究）

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2023.257069.2840

Ahmad Abdulrahman, A. Abuelezz, Nihal Sabet

{"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":null,"pages":null},"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}

引用次数: 0

Influence of Thickness of Endocrown and Ceramic Translucency on The Degree of Conversion of Resin Cement (In Vitro Study) 内冠厚度和陶瓷半透明度对树脂水泥转化程度的影响（体外研究）

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.273175.2960

Sara Bih, M. Zohdy, S. Foudah, Engy Farag

引用次数: 0

Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs 层厚度、内部结构和种植体角度对 3D 打印模型与种植体类似物精度的影响

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.260280.2860

Ingy Nouh, Nancy Rafla, Omar El Sergany

{"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":null,"pages":null},"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}

引用次数: 0

Assessment of ceramic repressing effect on color and translucency of pressable ceramic materials 评估陶瓷压制对可压陶瓷材料颜色和半透明度的影响

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.261221.2870

Sara Mohamed, S. Amgad, Ahmed Bakry

{"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":null,"pages":null},"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}

引用次数: 0

A Laboratory Comparative Study of the Cytotoxic Effect of Bioceramic and Resin Based Root Canal Sealers 生物陶瓷和树脂根管封闭剂细胞毒性作用的实验室比较研究

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.256882.2837

Rasha Mahfouz, Manal Abdelbaky, Mohamed Omaia

{"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":null,"pages":null},"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}

引用次数: 0

Assessment of Prolonged Effect of Repeated Botulinum Toxin-A Injection for Gummy Smile Correction 评估重复注射 A 型肉毒杆菌毒素矫正牙龈笑的长期效果

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.267104.2916

Namies Yousri, Noha Sabet, Islam Hassan, Marwah Abd El Latief

引用次数: 0

Evaluation of computer assisted surgical guide in preserving inferior alveolar nerve during harvesting bone graft 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效果

Egyptian dental journal Pub Date : 2024-04-01 DOI: 10.21608/edj.2024.263909.2888

Hanan Reda

引用次数: 0