Ain Shams Dental Journal最新文献

{"title":"Effect of Preparation Depth for an Endocrown on the Trueness and Precision of Intraoral Digital Scanners","authors":"Mazen Atout, Amina Hamdy, Ghada Abdel Fattah","doi":"10.21608/asdj.2022.144814.1126","DOIUrl":"https://doi.org/10.21608/asdj.2022.144814.1126","url":null,"abstract":"Aim: The aim was to evaluate the trueness and precision of four different intraoral scanners for scanning endocrown preparations with two depths (4 mm and 6 mm). Materials and methods: Tooth preparation for an endocrown was done and scans were divided according to depth of the preparation. The tooth scans were divided into 2 groups, Group A an endocrown with 6 mm depth and a butt joint margin of 2 mm thickness all around, Group B an endocrown with 4 mm depth, then each group was divided into 4 subgroups according to the intraoral scanner used for scanning, Omnicam v. 4.4.4, Omnicam v.4.4.6, Medit i500, 3Shape Trios 3 respectively, Reference scan were obtained from InEoS X5 extraoral scanner, and 10 test scans of each cavity were made with 4 IOSs. The STL files obtained were compared to reference models (trueness) and within each test group (precision) using a 3D analysis software program (Geomagic Control X). Obtained data were analyzed with three-way ANOVA. Results: Regarding trueness, Three-way ANOVA revealed significant differences between the different types of scanners (p < 0.001) (Omnicam 4.4.4: 56.53 ± 6.08 Omnicam 4.6.2: 47.68 ± 12.11 Medit i500: 52.07 ± 8.92 Trios 3: 38.81 ± 8.72). Preparation depth showed significant influence on the trueness (p < 0.001) (6 mm depth 55.70 ± 8.22, 4 mm depth 41.84 ± 9.46). For precision three-way ANOVA revealed significant differences between the different types of scanners (p < 0.001). Preparation depth also had significant influence on the precision (p < 0.001). Conclusion: Change of depth of preparation greatly affect the trueness and precision of the for Intra-oral scanners.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"29 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":"135532261","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}

{"title":"Comparison between Manual Lateral Cephalometric Analysis and Artificial Intelligence Driven Platforms","authors":"Hatem Saifeldin","doi":"10.21608/asdj.2022.171778.1152","DOIUrl":"https://doi.org/10.21608/asdj.2022.171778.1152","url":null,"abstract":"Aim: It remains uncertain whether artificial intelligence-based programs can detect cephalometric landmarks with accuracy. Therefore, the aim of this prospective study was to compare cephalometric measurements obtained with manual tracing and artificial intelligence programs. An additional goal was to evaluate the difference in cephalometric tracing duration. Materials and methods: Fifty pretreatment lateral cephalometric radiographs with complete permanent dentition were included in this study. Poor quality radiographs, irregular shaped incisors roots, craniofacial deformity and/or impacted teeth were excluded. Each lateral cephalogram was traced and analysed using manual method, WebCephand Cephio programs. After completion of landmark plotting, linear and angular measurements of Steiner’sanalysis were calculated. Results: The results indicated the presence of no statistically significant differences between the three methods. SNA, SNB and ANB angles had a relatively higher values with WebCeph compared to Cephio and manual cephalometric analysis. On the other hand, mandibular plane angle and occlusal plane angle were higher withCephio when compared to WebCeph and manual methods. The duration taken for cephalometric measurements showed statistically significant difference between manual cephalometric analysis and AI based programs with WebCeph presenting the least duration and manual method showing highest duration. Conclusion: The cephalometric measurements obtained from both WebCeph and Cephio programs are highly accurate when compared to manual measurements. Cephalometric measurements done using WebCeph and Cephio are formulated in a significantly shorter time in comparison to manual method.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"484 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":"135532264","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}

{"title":"The Effects of Altering Er:YAG Laser Energy and Exposure Time on Exposed Dentinal Tubules: An In Vitro Study","authors":"D. Hassouna, D. Mohamed","doi":"10.21608/asdj.2022.120611.1106","DOIUrl":"https://doi.org/10.21608/asdj.2022.120611.1106","url":null,"abstract":"Background : Different parameters of Erbium:Yttrium-Aluminum Garnet (Er:YAG) laser were considered in treatment of dentin hypersensitivity in previous clinical and in vitro sudies. Aim : To investigate the morphological aspects of inversely altering energy level and exposure time of Er:YAG laser on exposed dentinal tubules (DTs) in-vitro. Methodology : Ten human freshly extracted sound third molars were collected. Their crowns were horizontally then vertically sectioned to expose transverse and longitudinal sections of DTs respectively. The obtained 20 specimens were divided into four groups (n=5) after exposure to 35% phosphoric acid: Group LI (irradiated with Er:YAG laser of 80 mJ energy and 60 seconds exposure time), group LII (irradiated with Er:YAG laser of 120 mJ energy and 30 seconds exposure time). Control groups (CI and CII) were not irradiated. Specimens were assessed by scanning electron microscope (SEM) provided with digitizer and the depth of laser impact was measured in irradiated groups for statistical analysis. Results : Increasing energy and decreasing exposure time of Er:YAG laser in group LII adequately occluded exposed DTs, but the depth of laser impact was significantly reduced compared to group LI. Moreover, in group LII, the morphology of pulpal end of the DTs was adversely affected Conclusion : Er:YAG laser parameters set of (80 mJ, 5 Hz, 60 s), under water spray was effective in occluding exposed dentinal tubules and harmless to deep dentin tissues which could provide a safe dentin hypersensitivity treatment that further needs to be assessed clinically.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127206339","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}

{"title":"Comparison of Fixed Orthodontic Treatment Efficiency Using MBT vs. ROTH Prescription Brackets of Slot Size 0.018 Inch in Class I Maloc clusions: Randomized Controlled Trial","authors":"Shady Akram, Marwa M. Hegab, Amr El-Dakrooury, Mai H Aboulfotouh","doi":"10.21608/asdj.2022.129340.1117","DOIUrl":"https://doi.org/10.21608/asdj.2022.129340.1117","url":null,"abstract":"","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121142402","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}

{"title":"Title: Cleaning ability and Apically Extruded Debris of Three Single file Rotary Nickel Titanium systems (an in vitro study)","authors":"Nadine Mogahed, Mohamed Nagy, Tarek Abdel Aziz","doi":"10.21608/asdj.2022.121423.1108","DOIUrl":"https://doi.org/10.21608/asdj.2022.121423.1108","url":null,"abstract":"","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121851657","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}

{"title":"The effect of two different bar materials constructed with CAD/CAM technology on implant retained mandibular overdentures: radiographic evaluation.","authors":"Nora Abdelkader, Injy Talaat, N. Nawar, Hebatullah Tarek","doi":"10.21608/asdj.2022.110989.1098","DOIUrl":"https://doi.org/10.21608/asdj.2022.110989.1098","url":null,"abstract":"Background: Implant supported overdentures are a widely-accepted treatment approach with long-term effectiveness for restoring function and aesthetics, as well as improving masticatory efficiency and individual satisfaction. Recently, Computer aided design- Computer aided manufacturing (CAD/CAM) fabricated bars are increasingly used providing high stability levels, a stress-free fit, and high precision level. Objective: to evaluate the crestal bone height surrounding the implants in implant-supported mandibular overdentures retained with CAD/CAM milled Co-Cr and PEEK bar attachments using CBCT. Materials and Methods: Twenty completely edentulous patients were selected from the outpatient clinic, Prosthodontic Department, Faculty of Dentistry, Ain Shams University. They were classified into two groups: Group I: Ten patients received CAD/CAM milled Co-Cr bar supporting implant mandibular overdenture. Group II: Ten patients received CAD/CAM milled PEEK bar supporting implant mandibular overdenture. Radiographic evaluation using CBCT was carried out at insertion time, six months, and twelve months after loading to evaluate the marginal bone height changes around the implants in both groups. Results: Statistical analysis of the data revealed significant increase in the amount of bone loss around the implants for group I (Co-Cr) compared to group II (PEEK) during the one year follow-up period. Conclusion: The use of CAD/CAM milled Co-Cr and PEEK bar attachments to support implant mandibular overdenture meets the implant success criteria based on clinical and radiological findings after one year. However, CAD/CAM milled PEEK bar may be advantageous than CAD/CAM milled Co-Cr bar in terms of reduced bone loss.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115904429","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}

{"title":"Strain Induced within Anterior Lithium Disilicate Cantilever Bridges Under Different Loading Directions","authors":"Soha Gaafar, L. Ghanem, Amr Eletreby, T. Salah","doi":"10.21608/asdj.2022.111706.1102","DOIUrl":"https://doi.org/10.21608/asdj.2022.111706.1102","url":null,"abstract":"Background: Lithium disilicate has proven its clinical success in many clinical situations but no studies supported its use as a cantilever bridge in restoring missing maxillary lateral incisor. Aim: This study was designed to evaluate the strain induced in lithium disilicate anterior bridges replacing maxillary lateral incisor, as influenced by bridge design; cantilever bridges (CB) versus fixed-fixed bridges (FFB), and direction of loading; vertical and lateral. Materials and methods: A total of 20 heat-pressed monolithic lithium disilicate bridges were constructed and divided according to bridge design into two main groups (n=10), 1. CB: Cantilever bridge design with full coverage retainer on the canine, and 2. FFB: Fixed-fixed bridge design with full-coverage retainers on the central incisor and canine. Main groups were subdivided according to the direction of loading into two equal subgroups (n=5). Subgroup (V): Vertical loading, and Subgroup (L): Lateral loading. Wax patterns were duplicated to achieve identical bridges of each group using a custom-made wax injection mold. Ten duplicate epoxy resin dies were produced for each bridge group to hold the bridges during the strain test. The samples were subjected to vertical and lateral loading until complete fracture using universal testing machine. The strain induced in the samples was measured by a KYOWA strain meter. One-way Analysis of Variance (ANOVA) was used to compare between the two bridge designs. Results : The fixed-fixed bridge design Group (FFB) (control group) showed statistically significant higher mean strain value (678.90±34.40) than cantilever bridge group (CB) (411.80±35.13); while upon lateral loading, the CB showed a significantly higher mean strain value (399.40) than the FFB (262.60). Conclusion: The strain values induced in lithium disilicate anterior bridges have no catastrophic effect regardless of bridge design, indicating that cantilever bridge design could resist both vertical and lateral loading in a favorable and clinically acceptable mode.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369868","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}

{"title":"Characterization of human stem cells of the apical papilla","authors":"Sara El shahat, A. Elgendy, T. Elsewify","doi":"10.21608/asdj.2022.122036.1110","DOIUrl":"https://doi.org/10.21608/asdj.2022.122036.1110","url":null,"abstract":"Introduction : Dental tissues represent an alternative and promising Mesenchymal stem cells (MSCs) source for tissue engineering. Recently, a new population of MSCs residing in the apical papilla of permanent immature teeth has been discovered and was termed SCAP. Aim : This work is aimed to characterize human stem cells of the apical papilla to provide new insight on SCAP research for future biomedical applications. Methods : SCAP cultures were established from impacted third molars of young healthy donors at the stage of root development. Cultures were analyzed for stem cell markers, including CD73, CD44 and CD45 using flow cytometry. Results : The obtained results revealed that 43.9% and 75.9% of the CD44 and CD73 positive cells; respectively didn’t express CD45. Conclusion : the isolated stem cells are isolated from non-hematopoietic but mesenchymal source. These results suggest that SCAP represent a very promising adult mesenchymal stem cells source with enhanced properties that could be isolated and characterized by flow cytometric methods to be used for tissue engineering applications","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127916271","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}

{"title":"Incidence of dentinal crack formation after root canal preparation using different rotary files","authors":"khaled ayoub, Mohamed Nagy, S. Fahmy","doi":"10.21608/asdj.2022.128028.1112","DOIUrl":"https://doi.org/10.21608/asdj.2022.128028.1112","url":null,"abstract":"Purpose: the purpose of this study is to investigate the incidence of dentinal crack formation after root canal preparation using ProTaper Next, ProTaper Gold and TruNatomy rotary files. Material and methods: ninety five extracted human lower first molars were collected. Teeth were divided into 1 control group consisting of 5 teeth and 3 experimental with 30 samples in each experimental group. Root canal preparation was done with ProTaper Next, ProTaper Gold and TruNatomy files in the mesio-buccal canal. Then mesial roots were sectioned at 3mm, 6mm, and 9mm from the apex and examined under a stereomicroscope. The data were analyzed using Chi- Square test. Results: No cracks were observed in the control group. TruNatomy file produced less crack in compare to ProTaper Gold and ProTaper Next. Dentinal cracks occurred more in the middle and apical thirds in compare to coronal third. Conclusion: ProTaper Next tends to produce more crack in compare to ProTaper Gold and TruNatomy files.","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"11 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123800499","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}

{"title":"Assessing The Effect of Modified Bluegrass S Conventional Lingual Spurs in The Correction Of Open Bite associated with Tongue Thrust : Comparative study","authors":"Amani Ali, D. El-Ghoul, R. Fathy","doi":"10.21608/asdj.2022.88010.1066","DOIUrl":"https://doi.org/10.21608/asdj.2022.88010.1066","url":null,"abstract":"Introduction : the aim of this comparative randomized clinical trail (RCT), was to study the effect of Modified Bluegrass \"Non-Punitive therapy” on tongue thrust and dentoalvolar structure and to compare it with Conventional Lingual Spurs \"Punitive therapy\" for an early correction of anterior open bite in mixed and early permanent dentition. Material and Methods: The sample consisted of 20 subjects recruited at Ain Shams university ,orthodontic clinic Ain Shams University. Randomly allocated into 2 groups of subjects, with anterior open bite and Class I malocclusion , 5 subjects were excluded due to not completing follow up process . Group 1(G1) comprised 7 patients treated with Conventional lingual spurs with a mean initial age of 11.14 years (SD, ±1.86). Group 2(G2) consisted of 8 patients treated with Modified Bluegrass appliance, with a mean age of 10.38 years (SD, ±2.45). Results: Baseline demographic and cephalometric characteristics were similar between groups. There were significantly greater overbite improvement in both groups, slightly more in G1(3.2±2.69) than in the G2,( 2.2±1.32),with no statistical Conclusions: Both appliances resulted in an improvement of overbite and tongue position during an early open-bite correction , with similar dentoskeletal changes were observed in both groups after I year of treatment. However ,the C.L.S group showed significant reduction in Mandibular plane angle than the M.B.G group .","PeriodicalId":104867,"journal":{"name":"Ain Shams Dental Journal","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123813542","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}