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Objectives:The objective of this study was to evaluate clinically and radiographically use of oxidized regenerated cellulose as a graft material in transalveolar sinus lifting and implant insertion. Subjects and methods: Eighteen implants were inserted in sixteen patients with missed upper molar teeth. They were divided into two groups: group A (study group) included patients who received dental implants after sinus lift with oxidized regenerated cellulose graft; group B (control group) included patients who received implants after sinus lift without graft. The patients were clinically and radiographically evaluated preoperatively and postoperatively immediate and 6 months post-surgery. Clinical evaluation included pain and discomfort, swelling and implant stability using osstell. Radiographical evaluation was done by CBCT to measure the bone height and density. Results: Both sinus lifted groups with or without graft have significant success rates with superior radiographic results of oxidized cellulose grafted group over non grafted one after a follow up period up to 6 months. Conclusion: Transealveolar sinus lifting with oxidized regenerated cellulose graft is a promising graft for sinus augmentation.

Objectives:The aim of this study was to evaluate alveolar bone dimensional changes after flapless immediate implant placement clinically and radiographically.Patients and methods: Thirty-two Patients were divided into two groups; control (flap group): received flapped immediate implants combined with xeno-graft, Test (flapless group): received flapless immediate implants combined by xeno-graft. Evaluation includes presence of infection, wound dehiscence, implant exposure, graft exposure or loss, soft tissue dehiscence and implant stability.Results: According to the statistical analysis has been shown that in flapless group the buccal and palatal bone height has minimal statistical significant than the flap group (p<0.001). Also, the bone width at baseline (2, 4, 6 mm) shown that in flap group there is a minimal statistical significant than the flapless group (p<0.001). Both group showed a statistically a significant increase in mean implant stability measurements at 6 months. Conclusion:According to the results of this study could concluded that the flapless technique has been documented to be a simpler procedure as compared to "open flap" technique which preserve alveolar bone with immediate dental implants in the esthetic zone of the maxilla after tooth extraction. Also, several advantages achieved by flapless technique such as preservation of soft tissue architecture, intact periosteum maintains a better blood supply, thus reducing the likelihood of early bone resorption or promitting bone healing.

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