Orthodontic treatment is widely sought to enhance dental aesthetics and correct malocclusions, but its prolonged duration presents challenges, including root resorption, cavities, and periodontal risks. To accelerate treatment safely, various techniques have been explored. This study evaluates the efficacy of self-ligating brackets combined with micro-osteoperforations (MOPs) in enhancing orthodontic tooth movement.A prospective split-mouth randomized controlled trial was conducted on eight female patients, divided into two groups in which MOPs were performed either on the maxillary right or left side. Canine retraction was initiated simultaneously on both sides using rectangular stainless-steel wire (16×22 mil) and closed coils delivering 150 gm of force. MOPs were performed monthly for four consecutive months, beginning at the start of retraction. Measurements were taken clinically and with digitized 3D models.Results showed no statistically significant difference in movement between the experimental (with MOPs) and control (without MOPs) sides (P>0.05) throughout most of the study. However, a significant difference was observed in the first month. The study concludes that repeated MOPs with self-ligating brackets do not substantially accelerate maxillary canine retraction in female patients, except during the initial month of space closure.

Objectives: This vitro study's objective was to assess the impact of implant diameter on strain around implants retaining mandibular overdentures with bar attachments Purpose :The aim of this in vitro study was to evulate , by means of strain gauge analysis , the effect of different implant diameters on strain around two-implants retaining a mandibular over denture with bar attachments.Material and Methods: Three epoxy models with silicon mucosal simulation was fabricated and two laboratory implants were inserted in canine areas.according to implant diameter ,the experimental casts were randomly divided into 3 groups, groupI(4.3mm), groupII(3.8mm),groupIII(3mm)and all implants had a length of 10mm.three denture were fabricated and connected to implants with bar attachments. Four linear strain gauges were bonded to the epoxy resin at mesial, distal, buccal ,lingual surfaces of each implant. 100N static load was applied unilaterally over frist molar positions. Starins were measured at mesial,distal,buccal,lingual peri-implant sites. Loading side and non loading side Results: the results showed that for loading and non loading side ,for majority of surfaces and for molar positions small diameter implants recorded the highest strain, followed by medium diameter implants and the smallest strain was recorded with large diameter implants Conclusion: it is recommended to use the largest implant diameter as possible to minimize peri-implant strain when bar attachments are used to retained mandibular overdentures to implants Randomized controlled clinical trials are needed to evulate the effect of different implant diameters on peri-implant crestal alveolar bone loss Key words : implant ,overdenture, bar ,strain

This clinical study was directed to evaluate the clinical and radiographic success of Stainless-steel crowns versus zirconia crowns on primary molars. subjects and methods: A total of ten children with twenty pulpotomized primary mandibular molars were involved and categorized into 2 groups; Group I; pulpotomized primary molar teeth restored with zirconia crowns and Group II; pulpotomized primary molar teeth restored with Stainless-steel crowns. The clinical and radiographic evaluations were conducted at baseline, 1-, 3-, and 6-months intervals utilizing the Scoring system. Results: The results of this study showed that was no statistically significant difference between proximal contact areas, marginal adaptations, and restoration failure scores in the two groups at baseline, 1, 3, and 6 months. Stainless Steel crown group showed statistically significantly higher mean OHI scores than the Zirconia crown group at 1 and 6 months. Stainless Steel crown group showed statistically significantly higher mean GI scores than the Zirconia crown group at 3 and 6 months. After 6 months, 70% of the Stainless-Steel crowns showed acceptable clinical and radiographic criteria compared to 100% of the Zirconia crowns. CONCLUSIONS: Zirconia crowns demonstrated better gingival health than the stainless- steel crowns group. Zirconia crowns can be used as a safe esthetic alternative for stainless steel crowns with successful clinical outcomes.

Objectives:The purpose of present research was to clinically and radiographically evaluate the accuracy and effectiveness of customized titanium plates in Le Fort I orthognathic surgery.Materials and Methods:Ten participants with dentofacial abnormalities were included. Preoperative CT scans were used for virtual surgical planning (VSP), the design and fabrication of cutting guides and customized titanium plates. Clinical evaluations focused on the accuracy of the cutting guides and plates, dental occlusion, operative duration, soft tissue dehiscence or infection, plate fractures, and screw loosening. Postoperative CT scans were used to assess the accuracy of the customized plates using Mimics Medical 19.0 and 3-matic Medical 11.0 software through superimposition and measurement of discrepancies in millimeters. Written informed permission was acquired from all participants. Every participant underwent both clinical and radiographic evaluations.Results:There were no statistically significant differences between VSP and postoperative outcomes at the five pre-selected reference points, with discrepancies of 0.80 ± 0.26 mm (MSP), 1.10 ± 0.23 mm (FHP), and 1.08 ± 0.25 mm (CP) (p > 0.05). All patients achieved stable postoperative occlusion. One patient experienced transient upper lip numbness, which resolved within two months. No cases of plate loosening, infection, or soft tissue complications were reported.Conclusion:Customized titanium plates demonstrated high accuracy in translating the VSP into the operating room. The observed variations amongst planned and postoperative results were minimal and clinically insignificant. Additionally, the use of customized plates significantly reduced operative time and facilitated surgical procedures.Keywords: VSP, PSI, customized titanium plates, POSG system.

Objective: Dental caries is a complex infectious illness resulting from the interaction of several genetic and environmental variables. The purpose of this work is to evaluate the association among the genetic polymorphism TaqI (rs731236) in vitamin D receptor (VDR) with susceptibility to dental caries and/or severity in Egyptian children Subject and Methods: 300 Egyptian children with dental caries were participated in this study. Another hundred children in good health were included as controls. The oral and dental state of all individuals was assessed using the WHO standards, and dmft/DMFT Index was used for evaluating clinical information. Genomic DNA was extracted from buccal swabs, and the VDR TaqI (rs731236) gene polymorphism was determined by qRT-PCR.Results: The genotypic distribution and allelic frequency of both A and G alleles were evaluated in controls and dental caries subjects under different genetic models. A substantial association among the G allele of the VDR gene (rs731236) and dental caries susceptibility and/or severity were found compared to controls (p= 0.01). Moreover, a significant association with dental caries severity risk was observed under one of the co-dominant models used (GG versus AA, p= 0.01), dominant model (p= 0.02) and recessive model (p= 0.045). There was no significant association between the other co-dominant model utilized in this study (AG versus AA, p= 0.08) and the over-dominant model (p= 0.36) contrasted to the controls.Conclusion: VDR-Taq I gene polymorphism might be correlated with dental caries susceptibility and/or severity in Egyptian children with raised risk of dental caries.