Mansoura Journal of Dentistry最新文献_第5页

Comparative Evaluation of Shaping Ability and Cleaning Efficiency of Three Different Nickel-Titanium Rotary Systems 三种不同镍钛旋转系统成形能力和清洗效率的比较评价

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259770

Reham I. Zehairy, M. Osman, Amro A. Abd El-Razik

{"title":"Comparative Evaluation of Shaping Ability and Cleaning Efficiency of Three Different Nickel-Titanium Rotary Systems","authors":"Reham I. Zehairy, M. Osman, Amro A. Abd El-Razik","doi":"10.21608/mjd.2022.259770","DOIUrl":"https://doi.org/10.21608/mjd.2022.259770","url":null,"abstract":": Objective: This study was conducted to compare the shaping ability and cleaning efficiency of Mtwo, ProTaper Next and HyFlex CM rotary systems. Materials and Methods: A total of 45 root canals with curvatures ranging between 20o and 40o were divided into three groups of 15 canals: Mtwo, ProTaper Next and HyFlex CM based on pre-instrumentation radiographs. Canals were prepared to an apical size of 30. Using pre- and post-instrumentation radiographs, canal straightening was determined with a computer image analysis program. Preparation time was also recorded. These data were analysed using one-way analysis of variance (ANOVA) and post hoc Tukey’s test, and significance was set at P < 0.05. The amounts of debris and smear layer were quantified based on a numerical evaluation scale and were analysed statistically using the Kruskal–Wallis test. Results: HyFlex CM and ProTaper Next maintained the canal curvature significantly better than Mtwo (P < 0.05). ProTaper Next was significantly faster than the other two systems (P < 0.05). For debris removal, Mtwo and ProTaper Next achieved significantly better results (P < 0.05) than HyFlex CM in the apical and middle canal thirds. The smear layer results were not significantly different for the different parts of the canals (P > 0.05). Conclusions: Under the conditions of this study, HyFlex CM and ProTaper Next maintained the original canal curvature better than Mtwo. The use of Mtwo and HyFlex CM required more time to prepare the curved canals. Mtwo and ProTaper Next resulted in better canal cleanliness compared with HyFlex CM.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121740158","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 Finishing/Polishing Techniques on Surface Roughness of Three Different Resin Composite Materials: A laboratory Study 精加工/抛光工艺对三种不同树脂复合材料表面粗糙度影响的实验室研究

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259768

Adham A. Khairy, R. I. El-Toukhy, Nadia Zaghlol

{"title":"Effect of Finishing/Polishing Techniques on Surface Roughness of Three Different Resin Composite Materials: A laboratory Study","authors":"Adham A. Khairy, R. I. El-Toukhy, Nadia Zaghlol","doi":"10.21608/mjd.2022.259768","DOIUrl":"https://doi.org/10.21608/mjd.2022.259768","url":null,"abstract":": Objective: To determine the changes in surface roughness of different resin based composite materials having spherical shaped fillers after finishing and polishing with different systems and various application steps either one, two or three-steps. Materials and Methods: A total of 120 disc-shaped specimens (10 mm diameter × 2 mm thickness) were prepared from three different RBC materials (n=40 discs/group): a Nano-fill resin composite (Omnichroma); a Nanoceramic resin composite (Neo Spectra ST) and a Nano-hybrid resin composite (Charisma Topaz). Each group was subdivided into four subgroups (n=10) according to the finishing/polishing (F/P) system: control (without F/P), one-step system (Enhance); two-step system (Super Snap Rainbow); and three-step system (Soflex). The mean Ra was measured using the profilometer. To compare the surface roughness between RBC materials without and after F/P, the collected data were subjected to statistical analysis using two-way analysis of variance (ANOVA), Student’s t-test and One-way ANOVA with Tukey’s post hoc tests. The level of significance was seated p<0.05. Results: The Nano-fill resin composite showed the lowest mean Ra while the Nano-ceramic resin composite showed the highest value. A statistically significant difference was found in Ra and without and after F/P for the three RBC materials (p<0.001). Conclusions: The various finishing and polishing systems had a noticeable effect on the surface roughness of the RBCs. The Nano-fill resin composite had the lowest surface roughness. The two-step F/P system provided the best F/P protocol of resin based composites evaluated.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122071985","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: 1

Effect of Over-the-Counter Whitening Products on Enamel Color Change and Surface Roughness - A laboratory Study 非处方美白产品对牙釉质颜色变化和表面粗糙度的影响-实验室研究

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259774

Estbrq A. Mousa, R. I. El-Toukhy, Ashraf I Ali

{"title":"Effect of Over-the-Counter Whitening Products on Enamel Color Change and Surface Roughness - A laboratory Study","authors":"Estbrq A. Mousa, R. I. El-Toukhy, Ashraf I Ali","doi":"10.21608/mjd.2022.259774","DOIUrl":"https://doi.org/10.21608/mjd.2022.259774","url":null,"abstract":": Objective: To evaluate the effect of various over-the-counter whitening products on enamel color change and surface roughness. Materials and Methods: Ninety bovine teeth were collected and sectioned at the cementoenamel junction. Fifty teeth were selected and stained for color change test. They were randomly divided into five groups according to the whitening product applied (n= 10). Color measurements were carried out with a spectrophotometer. The remaining Forty teeth were used for surface roughness test, where they were randomly divided into four groups n=10. Surface roughness was evaluated with optical profilometer. Results: The color change (Δ 𝐸 ) was significantly greater in the group that was treated with whitening strips (p=0.05) only. No statistical difference was found when other tested groups were compared with each other. The surface roughness was significantly higher in all groups in comparison to the initial one. No significant differences were found among over-the-counter (OTC) products with respect to surface roughness (P=0.248). Conclusions: All OTC whitening products didn’t give the predicted effect on color change except with whitening strips. Meanwhile, they had a great effect on enamel surface roughness.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127720256","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

Impact of Resin Composite Restorative Material Pre-heating on Dental Pulp Temperature: A Laboratory study 树脂复合修复材料预热对牙髓温度影响的实验室研究

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259781

Asmaa S. El-Saeed, F. Elerian, H. Hamama, S. Mahmoud

{"title":"Impact of Resin Composite Restorative Material Pre-heating on Dental Pulp Temperature: A Laboratory study","authors":"Asmaa S. El-Saeed, F. Elerian, H. Hamama, S. Mahmoud","doi":"10.21608/mjd.2022.259781","DOIUrl":"https://doi.org/10.21608/mjd.2022.259781","url":null,"abstract":": Objective: To investigate and compare the impact of pre-heating of an ormocer-based and a methacrylate-based restorative materials at different temperature on intra-pulpal temperature with that at room temperature. Materials and Methods: In the current study, two bulk-fill composite systems; one ormocer-based, and one methacrylate-based were used according to their manufacturer instructions. A total of 30 sound maxillary human molars was selected, and prepared by removal of occlusal enamel and part of dentin till remaining dentin thickness becomes 2 mm above highest pulp horn. The specimens were assigned equally into two halves, according to type restorative material used (n=15 for each). For every restorative system; each group was further subdivided into three subgroups according to the preheating regimen (non pre-heated, 540 C or 600 C). A K-type thermocouple was placed inside tooth pulp chamber. The intra-pulpal temperature was measured in each specimen before, after composite placement and after curing of restorative material, also after 15sec, 30sec, 60sec. Results: The outcome of three-way ANOVA revealed that the type of composite material, different heating temperature and different restorative stages had a statistical significant effects on intra-pulpal temperature values (p < 0.05). Post-hoc Tukey test outcome showed that, the ormocer-based composites showed significant intra-pulpal temperature increase compared to methacrylate-based composites. Conclusions: On the basis of the results of the current study, it seems reasonable to conclude that there is a proof that heating of composite restorative materials increase the intra-pulpal temperature with a noticeable increase in pre-heating of ormocer compared to methacrylate-based composite.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133216540","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

Accuracy of Digital Models in Bolton Analysis for Angle Class I Malocclusion Group 角度I类错牙合组博尔顿分析数字模型的准确性

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259771

Ibrahim M. Abd-elgawad, M. Shamaa, A. Fouda

引用次数: 0

Evaluation of the effects of the Incisal capping twin block on the flaring of the lower incisors in the treatment of skeletal Class II malocclusion 门牙盖双挡块治疗骨性ⅱ类错牙合中下门牙外展的效果评价

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259769

A. A. Elabd, M. Tawfik, A. Hafez

{"title":"Evaluation of the effects of the Incisal capping twin block on the flaring of the lower incisors in the treatment of skeletal Class II malocclusion","authors":"A. A. Elabd, M. Tawfik, A. Hafez","doi":"10.21608/mjd.2022.259769","DOIUrl":"https://doi.org/10.21608/mjd.2022.259769","url":null,"abstract":": Objective: The purpose of this research was to evaluate the effect of the incisal capped Twin Block on the proclination of the lower incisors in the treatment of skeletal class II malocclusion. Materials and Methods: Ten patients (age ranged from 9 to 14 y) with skeletal class II due to mandibular retrusion were selected and treated with the incisal capped Twin Block appliance. Overjet was more than 4 mm. Lateral cephalometric radiographs, photographs, and study casts were obtained before and after treatment. The collected data were analyzed using (SPSS) program for Windows (Standard version 26). The treatment duration was about 8-12 months. Results: Incisal capped TB appliance had Dentoskeletal and soft tissue effects including non-significant effect on the maxillary growth, significant advancement of the mandible, increase in the posterior and total anterior facial height, decrease in the overjet and overbite, retroclination of the upper incisors, significant proclination of the lower incisors and improvement of the soft tissue profile. Conclusions: The incisal capped Twin Block appliance was effective in the correction of skeletal class II patients. It produced a combination of skeletal and dental effects by forward movement of the mandible, palatal tipping of the upper incisors and labial flaring of the lower incisors. The addition of the acrylic capping to the lower incisors did not control the position of the lower teeth and did not prevent their labial flaring.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126578520","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 Different Surface Treatments and Repair Materials on Shear Bond Strength of Bulk-Fill Resin Composite 不同表面处理及修补材料对大块填充树脂复合材料剪切粘结强度的影响

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259778

Alyaa A. Soliman, R. Mehesen, Ashraf I Ali

{"title":"Effect of Different Surface Treatments and Repair Materials on Shear Bond Strength of Bulk-Fill Resin Composite","authors":"Alyaa A. Soliman, R. Mehesen, Ashraf I Ali","doi":"10.21608/mjd.2022.259778","DOIUrl":"https://doi.org/10.21608/mjd.2022.259778","url":null,"abstract":": Objective: To evaluate the effect of different surface treatments on shear bond strength (SBS) between bulk-fill resin composite (BFRC) and bulk-fill flowable resin composite (BFFRC) or conventional flowable resin composite (CFRC). Materials and Methods: Sixteen blocks were prepared from Tetric N-Ceram BFRC, aged by thermo-cycling, and then stored in artificial saliva for 6 months. The blocks were divided into 4 groups (n=4) according to the surface treatment; Group1: roughened by coarse discs, Group 2: roughened by coarse discs and silanization, Group 3: roughened by air abrasion, and Group 4: roughened by air abrasion and silanization. Each group was subdivided into 2 subgroups (n=2) according to the used repair restorative system; subgroup A repaired with Tetric N-Bond universal adhesive/ Tetric N-Flow BFRC, and subgroup B was repaired with Prime& Bond universal adhesive /Spectra ST flow CFRC. The repair RC was placed on the RC blocks using tygon tubes and cured. The specimens were tested for SBS using a universal testing machine. Results: Regarding the effect of different surface treatments for both repair restorative systems, there was a significant difference (P<0.001). Regarding the effect of silane, there was no significant difference (p= 1.00). There was no significant difference between repair with CFRC or BFFRC (P =0.679). Conclusions: Surface treatment by air abrasion followed by silane and universal adhesive can be attempted clinically for the repair of aged BF restoration. The aged BFRC could be effectively repaired with the same bulk-fill or conventional RC if proper repair protocol was used.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132031178","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

Awareness of Evidence Based Recommendations on Toothbrush Bristles Design and Texture among Dentists 牙医对基于证据的牙刷刷毛设计和质地建议的认识

Mansoura Journal of Dentistry Pub Date : 2022-09-01 DOI: 10.21608/mjd.2022.259784

N. Attia, A. Etman

{"title":"Awareness of Evidence Based Recommendations on Toothbrush Bristles Design and Texture among Dentists","authors":"N. Attia, A. Etman","doi":"10.21608/mjd.2022.259784","DOIUrl":"https://doi.org/10.21608/mjd.2022.259784","url":null,"abstract":": Objective: Dental plaque is a necessary etiologic factor in the onset and progression of dental caries and periodontal disorders. Numerous individual and material-based factors have an impact on dental plaque control. In light of the most recent evidence-based guidelines, this study's purpose is to determine the best toothbrush bristles surface plane design (flat; multilevel; angled), texture (soft; medium; hard) and to estimate how many dentists are aware of that too. Materials and Methods: This is a one-question survey directed on social media platforms of dentists' groups: - “Is it preferable to use a toothbrush with soft or medium bristles, and are toothbrushes with multi-level or angled bristles better than traditional flat bristles for brushing the teeth?”. The answers or reactions were limited to the first valid 400 answers. Results: Comparing the bristles texture (soft & medium) and bristles design (straight & multilevel or angled) showed a statistically significant difference (p ≤ 0.05). Also, there was a statistically significant difference between combining effects taking this descending order soft &multilevel, medium & straight, medium & multilevel and finally soft & straight. Conclusions: Premium toothbrushes based on scientific research with soft, multilevel, or angled bristles were used more frequently by dentists than ones with medium or straight bristles.","PeriodicalId":308616,"journal":{"name":"Mansoura Journal of Dentistry","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126706407","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 Parental Presence in the Dental Clinic on Their Children Behavior 父母到牙科诊所对子女行为的评估

Mansoura Journal of Dentistry Pub Date : 2022-06-01 DOI: 10.21608/mjd.2022.240543

引用次数: 0

Ethoss versus Mineralized Plasmatic Matrix for Maxillary Lateral Sinus Lifting with Simultaneous Implant Placement 乙氧索与矿化质基质在上颌外侧窦提升术中同时植入种植体

Mansoura Journal of Dentistry Pub Date : 2022-06-01 DOI: 10.21608/mjd.2022.240538

引用次数: 0