Ain Shams Dental Journal最新文献_第4页

Effect of CAD/CAM zirconia versus cast metal attachment on stresses induced in Kennedy class I cases ( Strain gauge analysis) CAD/CAM氧化锆与铸造金属连接对Kennedy I类病例应力的影响(应变计分析)

Ain Shams Dental Journal Pub Date : 2023-06-01 DOI: 10.21608/asdj.2022.139651.1122

maha shokr, Injy Talaat, Hebatullah Tarek, Ashraf Eskander

{"title":"Effect of CAD/CAM zirconia versus cast metal attachment on stresses induced in Kennedy class I cases ( Strain gauge analysis)","authors":"maha shokr, Injy Talaat, Hebatullah Tarek, Ashraf Eskander","doi":"10.21608/asdj.2022.139651.1122","DOIUrl":"https://doi.org/10.21608/asdj.2022.139651.1122","url":null,"abstract":"Background: The removable partial denture (RPD) continues to be an essential prosthetic consideration especially when edentulous ridges posterior to a patient’s remaining teeth are to be restored. Precision attachments are used as extra-coronal retainers which are characterized by considerable retention improvement. In the current study, we aim to assess strains develop in supporting structures of two study groups resembling Kennedy class I partially edentulous cases which are rehabilitated with Co-Cr cast metal and CAD/CAM milled zirconia successively. Aim: To evaluate the effect of two different extra-coronal attachments, (Co-Cr cast metal and CAD/CAM milled zirconia) on stresses induced in supporting structure in Kennedy class I cases. Materials and Methods: This in vitro study was conducted on partially edentulous Kennedy class I cases. Two materials used in the construction of extra-coronal attachment retaining removable partial dentures were investigated; cast Co-Cr and CAD/CAM milled zirconia. The stresses induced were evaluated using the electric strain gauge analysis technique. Results: evaluating the strains developed in both groups showed a statistically significant increase in stresses induced in the group rehabilitated with Co-Cr cast metal attachments compared to the group of CAD/CAM milled zirconia on the loaded side and a statistically insignificant difference in the unloaded side. Conclusion: CAD/CAM milled zirconia and Co-Cr cast metal attachments showed a different distribution of forces as the zirconia attachment transmits fewer stresses to the loaded and unloaded sides compared to the metal attachment.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135195560","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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Assessment of the Effect of Chin Augmentation with Hyaluronic Acid Filler on Facial Soft Tissues Using Lateral Cephalometric Radiograph 用侧位头片评价透明质酸填充隆下巴对面部软组织的影响

Ain Shams Dental Journal Pub Date : 2023-06-01 DOI: 10.21608/asdj.2022.153700.1133

Lama Ayyad, Noha Ibrahim, Dalia Elboghdady, Islam Abbas, noha sabet

{"title":"Assessment of the Effect of Chin Augmentation with Hyaluronic Acid Filler on Facial Soft Tissues Using Lateral Cephalometric Radiograph","authors":"Lama Ayyad, Noha Ibrahim, Dalia Elboghdady, Islam Abbas, noha sabet","doi":"10.21608/asdj.2022.153700.1133","DOIUrl":"https://doi.org/10.21608/asdj.2022.153700.1133","url":null,"abstract":"Aim: To assess the effect of chin augmentation using Hyaluronic acid filler on facial soft tissues using lateral cephalometric radiographs. Material and methods: Prospective case series. 10 adult female patients with mild chin deficiencies. Patients underwent chin augmentation using Restylane Defyne hyaluronic acid dermal filler. Each patient received 2ml Filler injected in the chin area. Lateral cephalometric radiographs were taken at three-time intervals for each patient. The first radiograph taken before augmentation procedure, second radiograph two weeks after filler injection and the third and final radiograph taken six months after the augmentation procedure. Two readings were used to assess the facial changes following the augmentation procedure and the stability of these changes after six months. Results: Chin augmentation using Restylane Defyne showed marked improvement in sagittal position of soft tissue chin. Conclusion: Hyaluronic acid dermal filler can be used effectively for correction of chin deficiency with stable results after six months.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135195548","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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Effect of Occlusal Scheme in All on 4 Implant Retained Overdenture on Occlusal Fore Analysis Using T-Scan 4种种植固位覆盖义齿全咬合方案对t -扫描牙合前牙分析的影响

Ain Shams Dental Journal Pub Date : 2023-06-01 DOI: 10.21608/asdj.2022.148480.1128

Ghada elkhnini, AHMED Osama, Yasmin Thabet

{"title":"Effect of Occlusal Scheme in All on 4 Implant Retained Overdenture on Occlusal Fore Analysis Using T-Scan","authors":"Ghada elkhnini, AHMED Osama, Yasmin Thabet","doi":"10.21608/asdj.2022.148480.1128","DOIUrl":"https://doi.org/10.21608/asdj.2022.148480.1128","url":null,"abstract":"Aim: The aim of this study was to evaluate stress distribution on hybrid implant prosthesis (provisional prosthesis) with Lingualized and monoplane occlusal scheme using T-scan device. Materials and methods: Fourteen male complete edentulous patients were selected to participate in the current study. The patients were rehabilitated with upper complete dentures and lower hybrid prosthesis (provisional prosthesis) using the all on four concept with two occlusal schemes. The patients were randomly divided into 2 equal groups. Group A: Patients were rehabilitated with hybrid implants prosthesis with lingualized occlusal schem. Group B: Patients were rehabilitated with hybrid implants prosthesis with monoplane occlusal scheme. Completely guided surgery was done, T-scan occlusal force distribution records was taken in centric, protrusive and lateral movement. Results: The difference in both groups of all intervals was not statistically significant (p>0.05). Conclusion: Both types of occlusal schemes used (monoplane and lingualized) are considered as “non-traumatic protective occlusion” for All on four implant prosthesis.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135195540","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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Evaluation of the Apoptotic Effect of Punicalagin on Tongue Carcinoma Cell ( In-vitro study ) 槟榔苷对舌癌细胞凋亡作用的体外研究

Ain Shams Dental Journal Pub Date : 2023-06-01 DOI: 10.21608/asdj.2022.177696.1157

ENAS SABRY, Suzan Ibrahim, Nashwa El Khazzrgy, Mahetab Abdal Wahab

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Comparison of Dental Mock-ups manufactured by different techniques: Moulded and Milled (an in vitro study) 不同工艺制作的牙体模型的比较:模压和铣削(体外研究)

Ain Shams Dental Journal Pub Date : 2023-06-01 DOI: 10.21608/asdj.2022.148922.1129

Tarek Salah, Doaa Taha, Sara Allam

{"title":"Comparison of Dental Mock-ups manufactured by different techniques: Moulded and Milled (an in vitro study)","authors":"Tarek Salah, Doaa Taha, Sara Allam","doi":"10.21608/asdj.2022.148922.1129","DOIUrl":"https://doi.org/10.21608/asdj.2022.148922.1129","url":null,"abstract":"Introduction: The demand for overall esthetics has increased, placing the spotlight on improving dental esthetics. Porcelain veneer restorations are minimally invasive restorations which provide esthetic improvement, therefore proper tooth structure preparation is important. A diagnostic mock-up eases the preparation process for the clinician and allows better communication with the patient. With recent technologies, a more convenient production of the mock-up could be feasible. Materials and Methods: After impressions and photographs, the gathered data was digitized for use on a software for the designing of the digital smile design. 10 resin models were printed and 10 silicone indices were fabricated on top, for the fabrication of molded composite resin mock-ups. While 10 PMMA mock-ups were directly milled from the digital design. 20 preoperative resin models were printed for the fitting of each mock-up individually on a model. All fitted mock-ups were then scanned and uploaded onto a comparison software, to be compared to the reference digital smile design. All mock-ups were subjected to linear measurements digitally using the software and physically using a digital caliper. Statistical analysis was carried out to evaluate the accuracy of each group. Results: V olumetric and linear measurements showed higher trueness of the milled mock-ups to the reference digital smile design. Conclusion: The study exhibited a difference between the milled and molded mock-ups, showing the milled mock-ups are of higher accuracy. Within the limitations of this study, the production of CAD/CAM mock-ups decrease the number of errors along the process.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135195535","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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ASDJ Preface ASDJ 前言

Ain Shams Dental Journal Pub Date : 2023-03-01 DOI: 10.21608/asdj.2023.324070

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Comparative in-vivo study on the wear resistance of three different denture teeth materials -1-year study 三种不同义齿材料耐磨性的体内对比研究-1年研究

Ain Shams Dental Journal Pub Date : 2023-03-01 DOI: 10.21608/asdj.2022.162761.1143

Reham El Sharabasy, Mahmoud El Homossany

{"title":"Comparative in-vivo study on the wear resistance of three different denture teeth materials -1-year study","authors":"Reham El Sharabasy, Mahmoud El Homossany","doi":"10.21608/asdj.2022.162761.1143","DOIUrl":"https://doi.org/10.21608/asdj.2022.162761.1143","url":null,"abstract":"Aim: The purpose of this study was to evaluate the wear resistance of three denture teeth materials using the desktop scanner. Materials and methods: Fifteen completely edentulous patients were selected. All the patients received complete maxillary and mandibular dentures. The patients were divided into three groups: Group I patients received maxillary dentures with modified anatomic cross linked acrylic resin denture teeth, Group II received maxillary dentures with nano-hybrid composite teeth. Group III patients received maxillary dentures with light cured composite occlusal surfaces. All the maxillary dentures of the three groups were scanned using desktop scanner. Each scan was carried out at the baseline, 6 and 12 months. The software was used to compare the scanned dentures by superimposing the STL files. Results: There was a significant difference between the light cured composite, the acrylic and composite teeth in both intervals. While there was significant difference between the composite and acrylic teeth in 0-12 months period. At (0-6 months) it was found that the mean of wear in denture teeth made from acrylic resin, composite teeth and light cured composite was 46.13, 44.87 and 36.27 μm . At the interval period (0-12 months), the mean of wear of denture teeth made from acrylic resin, composite teeth and light cured composite was 120.27, 92.07 and 64.53 μm and there was statistically significant differences between the groups where (p<0.001). Conclusion: denture teeth modified with light cured composite resin showed the less total wear compared to acrylic and composite denture teeth.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135532267","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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ASDJ Table of contents ASDJ目录表

Ain Shams Dental Journal Pub Date : 2023-03-01 DOI: 10.21608/asdj.2023.324071

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The Effect of two margin designs on fracture resistance of Zirconia re-enforced lithium silicate crowns 两种边缘设计对氧化锆补强硅酸锂冠抗断裂性能的影响

Ain Shams Dental Journal Pub Date : 2023-03-01 DOI: 10.21608/asdj.2022.142850.1124

iman EL-Mashali, Marwa Wahsh, maged Zohdy

{"title":"The Effect of two margin designs on fracture resistance of Zirconia re-enforced lithium silicate crowns","authors":"iman EL-Mashali, Marwa Wahsh, maged Zohdy","doi":"10.21608/asdj.2022.142850.1124","DOIUrl":"https://doi.org/10.21608/asdj.2022.142850.1124","url":null,"abstract":"Aim: The continuous search for better qualities and properties will never stop. As advancements in dentistry continue, new materials and techniques are being introduced to the market to meet the increasing demand for superior esthetics and best physical and mechanical properties. This study was conducted to evaluate the fracture strength of full-contour crowns of Zirconia re-enforced lithium silicate (Celtra Duo) with two different marginal designs. Deep chamfer finish line (1mm) and Featheredge finish line (0.2mm). Materials and methods: 14 full contours monolithic Celtra Duo crowns were divided into two groups (n=7) according to each preparation design. Group (C): samples with deep chamfer finish line design (7 samples) Group (F): samples with feather edge finish line design (7 samples) Results: Data showed parametric distribution so; it was represented by mean and standard deviation (SD) values. Independent-samples t-test of significance was used when comparing between two means. The significance level was set at p≤0.05 within all tests. Conclusion: The highest value of the fracture strength was detected in Celtra duo crowns with feather edge design.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135532262","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

Effect of Two Different Digitally Constructed Bar Materials on The Supporting Structures of Implant-Retained Mandibular Overdenture (In-Vitro Study) 两种不同的数字构建棒材对种植保留下颌覆盖义齿支撑结构的影响(体外研究)

Ain Shams Dental Journal Pub Date : 2023-03-01 DOI: 10.21608/asdj.2023.200385.1172

Shaimaa Mohammed

{"title":"Effect of Two Different Digitally Constructed Bar Materials on The Supporting Structures of Implant-Retained Mandibular Overdenture (In-Vitro Study)","authors":"Shaimaa Mohammed","doi":"10.21608/asdj.2023.200385.1172","DOIUrl":"https://doi.org/10.21608/asdj.2023.200385.1172","url":null,"abstract":"Aim: The aim of this study was to evaluate which bar material (BioHPP or Cobalt Chromium) induced less stresses on the supporting structures of implant retained mandibular overdenture. Materials and methods: Completely edentulous mandibular educational cast was scanned. Designing an STL file including; implants beds, mucosal space and vertical slots for strain gauges was done. A bar joint design was selected & STL files were transferred to 5-axis milling machine to mill bars as follow: group I: Six bars were milled from BioHPP blank, group II: Six bars were milled from cobalt chromium blank. For each model, four strain gauge sensors were placed and a universal testing machine were used to apply a static load of 100N bilaterally between lower second premolar and first molar then unilaterally on the right side. The mean and the standard deviation of the recorded readings were collected, tabulated, and statistically analyzed. Results: The result of this study showed no significant difference between the two groups regarding bilateral loading as the mean micro strain was 314.83 &313.5 μm/m for group I & II respectively.Under unilateral loading, the results showed that the mean micro strain in the loaded side was 495.16 &493.83 μm/m for group I & II respectively and the result was statistically non-significant. Conclusion: Within the limitations of this study, it could be concluded that: -BioHPP and Cobalt-Chromium milled bars have no differences regarding micro strains developed in the supporting structures either upon bilateral or unilateral loading in implant retained mandibular overdenture.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135532271","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