Aim: This study aims to evaluate the effect of Platelet Rich Fibrin combined with Nano crystalline Hydroxy appatite bone graft on grade II mandibular furcation involvement. Subjects and methods: Thirty patients having grade II mandibular furcation defects, with vertical probing depth (VPD) ≥5mm and horizontal clinical attachment level (HCAL) ≥3mm. Following phase I therapy were classified into two groups, group1 received NcHA bone graft and group 2 received NcHA+PRF. Clinical and radiographic parameters were recorded at baseline, 6 and 12 months postoperatively. Results: Both treatment groups showed a significant probing pocket depth (PPD) reduction, clinical attachment gain, increase bone density 12-months after surgery compared with baseline. However, there was a highly significant PPD reduction and clinical attachment gain when PRF was added to NcHA. Conclusion: The NcHA bone graft in combination with PRF demonstrated clinical advantages beyond that achieved by the NcHA alone. Different methods of furcation management therapy include nonsurgical periodontal therapy, open flap debridement, furcation plasty, root resection\ Hemisection, regenerative techniques (Guided Tissue Regeneration, bone graft, Enamel Matrix Derivatives) and tunneling. (3)

Background: An untreated root canal is one of the main causes of failure in endodontics. The aims of this study were to detect the middle mesial canals (MMCs) prevalence in mandibular 1st molars, its configuration type, and its percentage of incidence with age by Cone-Beam Computed Tomography (CBCT) analysis.Methods: CBCT scan of 1650 patients were observed between January 2021 to February 2022 were collected using the CBCT imaging system from the database of the department of oral radiology, faculty of dental medicine, Al-Azhar university - Assiut branch. CBCT scan images were analyzed by Sidexis software. CBCT images were examined to detect the following: (1) The percentage of incidence frequency of the MMCs, (2) MMCs classification, and (3) Frequency of occurrence of MMCs according to age. Results: The incidence frequency percentage of the presence of MMCs among the Egyptian population was 10.79 % (208/1926) with no statistically significant due to gender, While MMCs configuration types showed 77% (160/208) confluent anatomy merging with either the mesio buccal or mesio lingual canals, 16.3% (34/208) fin anatomy and only 6.7% (14/208) showed independent MMCs with separate orifices and apical foramen. lastly the incidence frequency percentage of the presence of MMCs decreases with age. Conclusions: The MMCs prevalence in mandibular 1st molars among some Egyptian population was 10.79 %, and CBCT scan is helpful way to detect the presence of MMCs.

Aim:This study aims to evaluate the effect of and compare between the piezosurgical ridge splitting and osseodensification in implant primary stability. Subjects and Methods: 28 implants were divided into two groups. Group I: 14 implants in sites received piezosurgery technique. Group II: 14 implants in sites received osseodensification technique. Then, all implants were evaluated clinically for primary stability after implant insertion by Osstell mentor magnetic resonance device and radiographically for peri-implant bone density. Results: unpaired t-test between the two groups showed moderate statistical significant difference in group II when compared with group I in both primary stability and bone density Conclusion: The primary stability in both piezosurgical ridge splitting and osseodensification techniques is within normal range but in favor of osseodensification technique suggesting that osseodensification enhance the bone density thereby improve the implant primary stability.

Aim: It is to determine the relationship between gingival thickness and (buccal bone thickness, crown length, crown width, papillary height and papillary width) at upper central incisors teeth by means of a noninvasive and relatively accurate digital registration method. Subjects and Methods: In 100 periodontally healthy subjects, cone-beam computed tomographic images were obtained. Measurements of buccal bone thickness and gingival thickness at the central incisors was performed at points 1 mm from the alveolar crest. Correlation coefficient was calculated to assess the correlation between gingival thickness and buccal bone thickness. Results: The mean and standard deviation values were calculated for each group. Pearson correlation was used to find the correlation between Gingival thickness and each of Bone thickness, Crown length, Crown width, Papillary height and Papillary width. Independent sample t-test was used to compare between females and males' results in each variable. The significance level was set at p ≤ 0.05A statistically significant difference was found between females and males in all variables Gingival thickness, Bone thickness, Crown length, Crown width, Papillary height and Papillary width where (p<0.001), (p<0.001), (p=0.001), (p=0.027), (p=0.036) and (p<0.001) respectively, where females always showed thin type. There was a significant positive relationship between gingival thickness and Bone thickness, which states that increasing gingival thickness will be accompanied by increasing in bone thickness and vice versa. Conclusion: there are significant correlation between the gingival biotype, bone thickness, Crown length, crown width and papilla of anterior incisor crowns and respectively were females always showed thin biotype than males.

Aim:This study evaluates the clinical and microbiological effect of miswak and chlorhexidine gel on subgingival microbiota. Subjects and Methods: A full mouth randomized controlled clinical trial that carried out on 45 patients of both sex with mild to moderate chronic periodontitis. Selected patients were classified randomly into three equal group. After receiving the basic periodontal therapy group I used miswak 5 time a day (in accordance with the religious tradition), group II used CHX gel with tooth brush twice time daily, group III used tooth brush alone twice time daily. They evaluated clinicaly by Gingival Index, Plaque Index, Propping Depth and Attachment level at base line, after scalling and root blanning, one week, one month and finally after three month of using of each method, and microbiologically for detection and assessment of P.gingivalis at base line , after scalling and root blanning, one week, one month and finally after three month. Resultes: The present study exhibit that miswak more effective than tooth brush, as antimicrobial aginist p. gingivalis. There was no significant difference in the efficacy of miswak and CHX. Conclusion: Miswak more effective than tooth brush, as antimicrobial agonist.