INTRODUCTION:Immediate implant placement is now accepted in clinical dentistry for reconstruction of partially or completely edentulous mandible or maxilla. OBJECTIVES:The aim of the study was to evaluate the role of Maxgraft bone rings on the marginal bone level around dental implants placed in fresh extraction sockets. MATERIALS AND METHODS: A randomized clinical trial was carried out on fourteen cases with freshly extracted sockets with age range 20 to 50 years. There were 2 groups, study group and control group, the sockets of the study group were filled with the new "Maxgraft bone ring" and an immediate placement of implants were carried out in the graft site, while the control group sockets had immediate implant placement alone. A clinical and radiological evaluation were carried out immediately postoperatively, after 3 & 6 months to assess the osteointegration of the implant placed and to measure the level of the marginal bone around the implant. After 6 months final prosthesis was delivered. RESULTS: Radiographic evaluation revealed increase in marginal bone level around implants placed in the Maxgraft bone rings than those placed alone with statistical significance (p1 =0.008) CONCLUSIONS: Increase in marginal bone level using the Maxgraft bone rings due to its osteoconductive properties supporting natural and controlled tissue remodeling together with the trabecular structure of the cancellous bone within the graft allow optimal graft revascularization, rapid formation of new bone tissue and bone remodeling.

INTRODUCTION :Various techniques for maxillary sinus augmentation have been utilized using different materials to improve the autogenous bone formation in maxillary sinus, enhancing proper positioning of dental implants. OBJECTIVE:The aim of this study is to evaluate the sinus lift procedure using PTFE titanium reinforced membrane to maintain the space formed after schneiderian membrane elevation followed by simultaneous implant placement. Patients and Methods: This case series was carried out on 12 patients with average age 52.3 years old with posterior maxillary bone 4-6 mm. Implants were placed immediately after sinus lift procedure and the sinus membrane was maintained in position using PTFE titanium reinforced membrane. Patients were followed up for 6 months clinically and radiographically. RESULTS: All patients except one patient experienced pain and swelling few days after surgery which decreased gradually until completely disappeared one week postoperatively, this single case suffered from infection 3 months after surgery led to implant failure. All patients except the failed case showed a significant increase in bone height, bone density and implant stability. CONCLUSION: Results in this study have proven the effectiveness of the titanium reinforced PTFE as a space maintainer facilitating new bone formation.

INTRODUCTION: trauma of the zygomaticomaxillary complex (ZMC) has functional and aesthetic consequences. Management of ZMC fractures is considered one of the most debatable issues regarding classification, diagnosis and surgical technique.Precise management of the ZMC fractures needs accurate diagnosis, accessible exposure, and precise rigid fixation OBJECTIVES: To compare between ultrasound guided closed reduction and open reduction of zygomatic arch in cases of ZMC fracture. MATERIALS AND METHODS:This study was conducted on a sample of twenty patients who had fracture repair of ZMC. Ten of them (study group) were treated via direct peri-orbital approach with the use of intra-operative ultrasound to guide zygomatic arch reduction. While the other ten patients (control group) via coronal approach with open reduction of zygomatic arch. Postoperative patient evaluation was performed with specific attention paid towards zygomatic arch reduction, nerve function, wound healing, and postoperative ocular complications. RESULTS: Radiographic follow up showed no statistical significant difference between normal side and reduced side of zygomatic arch which reflect satisfactory arch reduction among both groups. CONCLUSION: Ultrasonography is an effective method for guiding zygomatic arch reduction with other minimal incisions in cases of ZMC fracture. On the other hand, coronal incisions have advantages of giving excellent access to ZMC fracture with direct reduction of zygomatic arch but with considerable disadvantages.