Al-Azhar Journal of Dental Science最新文献

{"title":"Evaluation of translucency and strength of two glass ceramics after different surface treatments","authors":"Mennatallah Wahba, T. Morsi, A. Mohamed, A. EL-Etreby","doi":"10.21608/ajdsm.2022.159194.1364","DOIUrl":"https://doi.org/10.21608/ajdsm.2022.159194.1364","url":null,"abstract":"Objective: To investigate the effect of different surface treatments on biaxial flexural strength and translucency of two different glass-ceramics. Materials and Methods: Sixty disc-shaped specimens (10 mm x 0.3 mm) were divided into two groups (n=30) according to the type of the ceramic material; lithium disilicate ceramic (IPS e.max CAD), and leucite reinforced ceramic (IPS Empress CAD). Each group was divided into three subgroups (n=10) according to the surface treatment applied; whether hydrofluoric acid etching, sandblasting, or no treatment. Translucency Parameter was measured over black and white backgrounds using dental spectrophotometer VITA Easyshade Compact, while bi-axial flexural strength was measured using a ball on ring fixture test. Data was statistically analyzed by ANOVA and Tukey’s post hoc analysis (α = 0.05). Results: There was a significant difference (P <0.05) in translucency parameter between all surface treatments used for IPS E.max CAD groups, while for IPS Empress CAD there was a significant difference (P < 0.05) in translucency between both the control and hydrofluoric acid groups as well as between hydrofluoric acid and sandblasted groups. There was no significant difference in bi-axial flexural strength between different types of surface treatments used for IPS E.max CAD. IPS Empress CAD groups showed a significant difference (P < 0.05) only between the control and the hydrofluoric acid groups. Conclusions: IPS E.max CAD had higher translucency and biaxial flexural strength. Different surface treatments used affected the flexural strength and translucency negatively in both materials used.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133951830","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":"Evaluation of patient satisfaction and masticatory efficiency of single implant-retained mandibular overdenture using two types of matrices.","authors":"W. Badr, Osama Abo Helal, O. Baraka","doi":"10.21608/ajdsm.2021.62004.1162","DOIUrl":"https://doi.org/10.21608/ajdsm.2021.62004.1162","url":null,"abstract":"Objective: The aim of this study was to evaluate masticatory efficiency and patient satisfaction of ball and silicone-based soft liner and metal matrices for mandibular single implant-retained overdenture . Subjects and Methods: From the removable prosthodontics department clinic, Faculty of Dental Medicine, (Boys, Cairo, Egypt), Al-Azhar University, 10 completely edentulous patients were randomly chosen. The patients were divided into two groups, group I received a single implant-retained overdenture with the ball and metal socket, while group II received a single implant-retained overdenture with the ball and silicone-based soft-liner attachment. Statistical analysis was done using student t-test, the data distribution of normality was done by using the Kolmogorov Smirnov test . Results: It was found that group I recorded a significant increase in masticatory efficiency and there was no significant difference between the two groups in patient satisfaction. Conclusion: Silicone-based soft liners when used as a matrix instead of metal housing produce lower values of masticatory efficiency and equal values of patient satisfaction.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128257114","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":"Evaluation of chlorhexidine gel combined with platelet-rich fibrin \"PRF\" in reducing alveolar osteitis after removal of impacted mandibular third molar.","authors":"Mokhtar Elshershaby","doi":"10.21608/ajdsm.2021.62460.1163","DOIUrl":"https://doi.org/10.21608/ajdsm.2021.62460.1163","url":null,"abstract":"Objectives: To evaluate the effect of chlorhexidine gel combined with platelet-rich fibrin “PRF” in reducing alveolar osteitis after removal of impacted mandibular third molar. Subjects and methods: Forty two patients were divided randomly into three groups: Group A: the socket received 0.2% CHX gel and PRF. Group B: the sockets received PRF only. Group C (control): the sockets did not receive any treatment. Follow up: 2, 7 and 15 days post-operative for evaluating alveolar osteitis, pain, facial swelling, mouth opening and wound healing. Results: At the present study, reduction of alveolar osteitis incidence in group A in comparison to group B (7.6%) and group C (30.7%). There were significant reduction in pain between groups in 2 days and 7 days. There was no difference in facial swelling, maximum mouth opening. Follow up: after 3 months for evaluating bone density at the site of extraction and the result were increase in bone density in group A and group B in comparison to group C. Conclusion: Chlorhexidine gel combined with platelet-rich fibrin “PRF” reduce pain and decrease the incidence of AO.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125175160","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":"evaluation of translucency and biaxial flexural strength of different ceramic materials.","authors":"taha alsharawi, hoda abdal sadek, T. Morsy","doi":"10.21608/ajdsm.2022.137532.1332","DOIUrl":"https://doi.org/10.21608/ajdsm.2022.137532.1332","url":null,"abstract":"Objective: To evaluate Translucency and Flexural strength of four ceramic materials Lithium disilicate (Emax), translucent zirconia (Bruxizir), Ultra translucent zirconia (Katana ST) and Zirconia reinforced lithium silicate (Suprinity), using two thickness, 0.5 mm and 1mm. Materials and Methods: Blocks of four CAD/CAM esthetic restorative materials (emax, suprinity, bruxzir and katana) were used to prepare 80 samples (disks) with the following dimensions: 10mm x 0.5mm and 10mm x 1mm for suprinity and emax ceramic material & 12mm x 0.6mm and 12mm x 1.2mm for Bruxzir and katana ceramic material. Using IsoMet 4000 micro saw by a diamond disk 0.6 mm thickness with cutting speed 2500 rpm. Then all the disks were crystallized and sintered. One Ceramic disc of each material were examined under a Reflective spectrophotometer (Model RM200QC, X-Rite, Neu-Isenburg, Germany) to determine the translucency for each disk. After that each disk was subjected to a biaxial flexural strength test. Results: For translucency test, at 0.5mm the highest value was found with Vita Suprinity (21.71±1.59), followed by Emax (17.89±3.47), then Bruxzir (13.27±1.86) while the lowest value was found with Katana ST (11.57±2.45). while at 1mm the highest value was found with Emax (14.78±1.63), followed by Vita Suprinity (14.65±1.58), then Katana ST (10.59±2.16) while the lowest value was found with Bruxzir (10.42±1.56). Otherwise for biaxial flexural strength, at 0.5 mm the highest value was found with bruxzir (194.04±59.50), followed by Katana ST (191.66±63.71), then suprinity (163.96±28.86), while the lowest value was found with Emax (113.70±26.76). while at 1mm the highest value was found with Katana ST (605.47±115.98), followed by Bruxzir (588.40±111.39), then Emax (474.62±68.36) while the lowest value was found with Vita Suprinity (419.50±76.96). Conclusion: Increasing thickness affect the flexural strength of ceramic material positively, while it affects the translucency negatively except for katana. Different ceramic material exhibited variable translucency and flexural strength values depending on their composition. Lithium disilicate materials show more translucency and lower flexural strength than zirconia materials.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134458063","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":"Evaluation of Dental Implant Angulation on Marginal Bone Loss in Posterior Maxillary Area","authors":"I. Metwally, A. Elfeky, A. Hosny","doi":"10.21608/ajdsm.2021.63052.1166","DOIUrl":"https://doi.org/10.21608/ajdsm.2021.63052.1166","url":null,"abstract":"Objective: To assess the marginal bone loss in the angled implant in the posterior maxillary region. Subjects and methods: A total of 14 implants, 7 angled implants and 7 straight implants in posterior maxilla with surgical guide were placed. Seven patients ranged in age between 40.0 – 43.0 years with a mean age of 41.71 ± 1.25 years for angulated implant group; and seven patients ranged in age between 44.0 – 45.0 years with a mean age 44.43 ± 0.53 years for straight implant group. Flap less approach through surgical guide with angulation 25-30 for angled implant and straight implant without angulation. Results: Angulated implant showed a higher significant buccal marginal bone loss than straight implant at prosthetic and 6 months after loading. Angulated implant showed a higher significant palatal marginal bone loss than straight implant at prosthetic and 6 months after loading. Conclusion : The angled implant showed a higher significant marginal bone loss than the straight implant on the prosthesis and 6 months after loading. However, angulated implants can be a satisfactory alternative to vertical implants to avoid transplant procedures.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133824990","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":"Clinical and Radiographic Evaluation of Different Obturating Materials as Biological Barrier in Quality of Obturation of Pulpectomized Primary Anterior Teeth","authors":"I. Ali, Alaa Al Deen Mohamed Ismai, A. Abbas","doi":"10.21608/ajdsm.2022.119687.1301","DOIUrl":"https://doi.org/10.21608/ajdsm.2022.119687.1301","url":null,"abstract":"Objective: To evaluate the effect of Absorbable Gelatin Sponge (AGS) and Colla cote as a biological barrier in pulpectomized primary anterior teeth. Subjects and methods: This study was undertaken on 36 primary anterior teeth indicated for pulpectomy. The teeth were classified randomly according to the used obturation materials (Metapex, Metapex/AGS, and Metapex/Colla Cote) into 3 equal groups. All teeth were evaluated clinical and radiographic to assess the quality of obturation. Results: All pulpectomized teeth in Metapex and Metapex/Colla Cote groups, showed materials extrusion beyond the apex at immediate post-operative. While after three months of follow-up, all extruded materials beyond the apex were resorbed. However, all teeth in Metapex/AGS group, at immediate and three months showed no extrusion beyond the apex. Conclusion: The addition of AGS to Metapex can increase the viscosity of the Metapex, which in turn decreases the tendency of Metapex extrusion and post-operative periapical inflammation and pain, thus increasing the success rate chances.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133599713","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":"EFFECTS OF DIFFERENT NATURAL IRRIGANT SOLUTIONS ON SURFACE ROUGHNESS OF ROOT CANAL DENTIN USING QUANTITATIVE TOPOGRAPHICAL 3D SURFACE TEXTURE ANALYSIS","authors":"Hemat M. Elsheikh, Heba Abdelkafy, Inas M. Al-Sherbiny, R. Marzouk, Seham Hallool","doi":"10.21608/ajdsm.2022.142331.1338","DOIUrl":"https://doi.org/10.21608/ajdsm.2022.142331.1338","url":null,"abstract":"Objective: was to investigate the effect of 0.2% chitosan, 0.2% nano chitosan, and 5% apple vinegar compared to 17% EDTA on intraradicular dentin surface roughness. Materials and Methods: Twenty single-rooted human teeth were used in this study, after decoronation, working length determination, and mechanical preparation using ProTaper Next rotary files with irrigation after each file using 5ml of 2.6% NaOCl. The specimens were randomly divided into four groups according to the final irrigating solution. Group I used 17%EDTA, group II with 0.2% chitosan, group III with 0.2% nano-chitosan, and group IV with 5% apple vinegar. Specimens were sectioned longitudinally and evaluated for surface roughness changes using Environmental Scanning Electron Microscope (ESEM) and a photomicrograph was analyzed using a 3D software system. Results: The highest mean value of surface roughness was recorded in group IV treated with 5% apple vinegar with a statistically significant difference from the other groups (P value< 0.05). The lowest mean value was observed in group III used 0.2% nano-chitosan followed by group II irrigated with 0.2% chitosan which was lower than the control group I used 17% EDTA with statistically significant difference between the three groups (P value< 0.05). Conclusion: 0.2% nano-chitosan as the final irrigating solution had minimal drawbacks on dentin micro-structures by producing a slight change of surface roughness .","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114109620","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":"Antibacterial Effect of Chitosan and Low-Level Diode Laser Against Enterococcus faecalis in Infected Root Canals in Primary Molars","authors":"waleed amin, M. Mohamed, I. Barakat","doi":"10.21608/ajdsm.2021.87621.1217","DOIUrl":"https://doi.org/10.21608/ajdsm.2021.87621.1217","url":null,"abstract":"Objectives: Infected root canals contain resistant bacteria with high resistance to antibacterial solutions such as Enterococcus faecalis (E. faecalis). Therefore, this study was aimed to evaluate and compare the antibacterial effect of the chitosan (CH) and Diode laser on an infected root canal. Subjects and Methods: Four disinfectant systems were used in the present study; 2.5% sodium hypochlorite (NaOCl) “control group”, 0.2% chitosan solution, low-level diode laser (1.5-watt), and chitosan/diode laser in combination. This study involved a total of sixty-four carious primary molar teeth indicated for pulpectomy in children aged between 4-7 years. Results: All disinfectant systems showed a statistically significant effect against E. faecalis. There was a statistically significant difference between the four tested systems, while among the groups, there is no statistically difference between NaOCl and diode laser, and between diode laser and combination of chitosan/diode laser. Conclusion: The use of chitosan and laser alone or in combination has a significant effect on the reduction of E. faecalis count. However, the use of diode laser and combination of chitosan/diode laser as disinfectant systems showed a statistically comparable result to NaOCl.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134127708","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":"Evaluation For Elastic Modulus Of CAD-CAM Milled And 3D Printed Denture Base Resins","authors":"Ahmed Zeidan, Ramy Abd El-Rahim, Mohamed R. Helal","doi":"10.21608/ajdsm.2021.81731.1209","DOIUrl":"https://doi.org/10.21608/ajdsm.2021.81731.1209","url":null,"abstract":"Objective: The objective of this study was to compare the elastic modulus between milled, 3D printed and conventional compression moulded denture base resins (DBRs). Materials and methods: Three different types of DBRs were used: milled resin (pre-polymerized PMMA plates) ; a 3D printed resin (photopolymerized resin); and a polymethyl methacrylate (PMMA) heat cured resin (powder-liquid system). Thirty specimens have been constructed with specific dimensions (65mm x10mm x3mm) and divided into 3 groups (10 for each group) according to the type of DBR, Group I contained the milled DBR specimens, Group II contained 3-dimentional printed DBR specimens, and Group III contained conventional compression moulded DBR specimens. The elastic modulus of the 30 specimens were measured and calculated by universal testing machine using three-point loading test. Results: The elastic modulus of the milled group was significantly higher than that of the other 2 groups (P<0.05), while the elastic modulus of the compression moulded group was significantly greater than that of the 3D printed group (P<0.05). Conclusion: milled DBR show the highest elastic modulus when compared with conventional compression moulded or 3D printed DBRs, while 3D printed DBR shows the lowest elastic modulus.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115919801","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":"Clinical and 3-dimensional radiographic assessment of nasal airway volume in adult orthodontic patients following mini-screw assisted rapid maxillary expansion: A prospective clinical study","authors":"samer ALMansour, Mohammad-Wael Saleh, Ibrahim Eldsoky, Mohammed A Shendy","doi":"10.21608/ajdsm.2021.96739.1244","DOIUrl":"https://doi.org/10.21608/ajdsm.2021.96739.1244","url":null,"abstract":"Objectives: mini-screw assisted rapid maxillary expansion (MARME) can be clinically acceptable and stable treatment modality for maxillary constriction in adults. Subjects and methods: The current study was conducted on 12 orthodontic patients. The mini-screw assisted rapid maxillary expansion appliance consists of two molar bands attached to maxillary first molars and 4 micro-implants to be bi-cortically inserted. Expansion protocol: Initial expansion rate: 2 turns/day. Expansion rate after opening of the diastema: 1 turn/day. CBCT was performed after 3 months after expansion. Data from the CBCT were reconstructed to produce slices for preoperative and postoperative evaluation, Direct assessment of airway dimensions through nasal endoscopy for assessment of nasal airway flow and CBCT of nasal airway dimensions (T0 for preoperative dimension, T1 for dimension at 3 months of expansion and T2 for dimension at 6 months of expansion). Results: In the present study, there was a statistically significant increase in nasal volume, pharyngeal volume, and total volume after T1 and T2. There was a statistically significant increase in nasal volume, pharyngeal volume, and total volume at T1 – T2 and T0 – T2. By Nasal endoscopy there was a statistically significant improvement in nasal volume after 3 and 6 months of Expansion. Conclusion: After nonsurgical maxillary expansion in young adults, the nasal and pharyngeal volume and mean total volume significantly increased at T1 – T2 and T0 – T2. These results suggest that mini screw assisted rapid maxillary expansion can be a helpful modality to improve breathing in young adults with maxillary constriction.","PeriodicalId":117944,"journal":{"name":"Al-Azhar Journal of Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124331238","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}