Purpose: Mandibular angle fractures remain among the most difficult and unpredictable fractures to treat compared with those of other areas of the mandible. This study was done to clinically and radiographically evaluate the use of three-dimensional (3D) Threadlock plate for the treatment of mandibular angle fractures. Materials and methods: Ten patients were selected from those admitted to the Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Alexandria University, suffering from isolated mandibular angle fracture. Management was accomplished after careful case history, clinical examination and radiographic examination. Reduction of the fracture was accomplished through an extraoral approach followed by fixation with 3D Threadlock plates. The patients were then followed up for 6 months postoperatively and the collected clinical and radiographic data was statistically analyzed. Results: The following clinical parameters were used: pain intensity, postsurgical edema, maximal mouth opening, sensory function, surgical wound, and occlusion. All the results showed that the clinical findings were within reasonable limits and returned to normal values during the follow up period. Radiographically, the increase in mean bone density was statistically significant from preoperative to 6 weeks postoperative, from 6 weeks to 3 months and from 3 months to 6 months postoperatively, consistent with the progress of fracture bone healing. Conclusion: Considering the results of the current study, it is concluded that the 3-D plate has all the advantages of 2 miniplate fixation i.e. 1) High fracture fragment stability, 2) Harmonius occlusion, 3) Early return of the patient to his/her normal social life and function. 4) At the same time, it overcomes all the shortcomings of single miniplate, and satisfies the biomechanical requirements for occlusal loading. According to this study, the 3D Threadlock plating system through an extraoral/transbuccal approach is a suitable method for fixation of mandibular angle fractures, providing adequate stability especially in severely displaced mandibular angle fractures.

Introduction: Mandibular angle fractures (MAFs) account for 23% to 42% of all mandibular fractures. The frequent involvement of the angle in mandibular fractures can be attributed to its thin cross-sectional bone area and the presence of a third molar Objectives: The aim of this study was to evaluate clinically and radiologically the use of two dynamic compression miniplates in treatment of mandibular angle fractures using Trocar instrumentation Materials and methods: The study was conducted on ten patients diagnosed with a single mandibular angle fracture indicated for open reduction and internal fixation. The fracture was exposed through transoral vestibular incision and reduced under general anesthesia. Third molar tooth in the fracture line was extracted. Temporary Maxillomandibular fixation was done using 26gauge stainless steel wires with arch bars. One dynamic compression miniplate was fixed on the external oblique ridge. The second miniplate was fixed on the lower border of the mandible using Trocar instrumentation. Results: Pain, edema and trismus decreased significantly over the follow up period. Maximum interincisal mouth opening and bone density along the fracture line increased significantly over the follow up period. Five patients had parasthesia of the inferior alveolar and mental nerve preoperatively. The parasthesia decreased progressively from the fourth week. Postoperative panorama radiographs showed adequate reduction and increase in bone density along the fracture line. No postoperative complication occurred. Conclusion: Two 2.0 mm dynamic compression miniplates are suitable for treatment of mandibular angle fractures using Trocar instrumentation.

INTRODUCTION: Traumatic loss of teeth in the esthetic zone commonly results in significant loss of buccal bone. This leads to reduced esthetics, problems with phonetics and reduction in function. Single tooth replacement has become an indication for implant-based restoration. In case of lack of bone volume the need of surgical reconstruction of the alveolar ridge is warranted. Several bone grafting techniques have been described to ensure sufficient bone volume for implantation. OBJECTIVES: Evaluation of using the zygomatic buttress as an intraoral bone harvesting donor site for pre-implant grafting. MATERIALS AND METHODS: Twelve patients were selected with limited alveolar ridge defect in the esthetic zone that needs bone grafting procedure prior to dental implants. Patients were treated using a 2-stage technique where bone blocks harvested from the zygomatic buttress region were placed as onlay grafts and fixed with osteosynthesis micro screws. After 4 months of healing, screws were removed for implant placement RESULTS: Harvesting of 12 bone blocks were performed for all patients indicating a success rate of 100% for the zygomatic buttress area as a donor site. Final rehabilitation with dental implants was possible in 11 of 12 patients, yielding a success rate of 91.6%. Three patients (25%) had postoperative complications at the donor site and one patient (8.3%) at the recipient site. The mean value of bone width pre-operatively was 3.64 ± .48 mm which increased to 5.47 ± .57 mm post-operatively, the increase in mean value of bone width was statistically significant (p < 0.001). CONCLUSIONS: Harvesting of intraoral bone blocks from the zygomatic buttress region is an effective and safe method to treat localized alveolar ridge defect before implant placement.

INTRODUCTION: Dental implants are considered stable tools for replacing missing teeth, achieving long-term success rates above 90 percent, and their use in dental practice has become normal. One of the reasons to this success is the primary reliability of an implant. Implant design is one of the main factors that play a role in stability. OBJECTIVES: The purpose of this study was to compare the role of the Macro thread design and the Micro thread design on implant stability through the use of the Resonance Frequency Analysis (RFA). MATERIALS AND METHODS: The study was carried out on 6 patients, each of these patients has missing teeth on each side of posterior area in the lower jaw. All the right sides received Micro thread design implant (dentium implant,) and the left side received Macro thread design implant (Megagen AnyRidge). After dental implants were placed in their sites, the stability was measured by using the Resonance Frequency Analysis (RFA) to assess the stability of the two types of implants at three times periods: At the time of placing the implant, 3 months and 6 months. RESULTS: The mean implant Stability value for Group A was 70.57±5.74 immediately post-operatively, on the 3 month to 77.14±6.74 and reach 84.29±6.02 on the 6 month, for Group B was 63.29±6.58 immediately post-operatively, on the 3 month 70.57 ± 4.69 and on the 6 month 77.14±4.53. The mean bone density values for Group A at 3 months was 481.98± 51.78 and at 6th month was 504.28± 47.50, in Group B the 3 months was 439.54±70.49 and at 6th month was 463.83± 74.44. CONCLUSION: The Micro thread design implants shows higher stability than Macro thread design.