Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Oral and Maxillofacial Surgery

Objective:the aim of this present study was to evaluate the relation between primary implant stability of delayed implant placement and bone density in posterior mandibular area.Patients and methods:16 implants were placed for 9 patients (6 females and 3 males) that had at least a missing one mandibular posterior tooth. Bone density of each implant site was measured preoperatively through orthopantomograph. The implant osteotomy was done according to the manufacture{u2019}s instruction under copious irrigation after the replacement of the pilot drill with a 2.0mm trephine bur to obtain a core biopsy with a fixed starting torque of 15Nm2. For each implant primary implant stability was measured immediately postoperatively by resonance frequency analysis. Results: for all the 16 implants sites, bone density was D4. All the 16 implants were stable with a mean primary stability of 69.9(+\- 14.5) ISQ.Conclusion: there is no correlation between primary implant stability and bone density and drilling torque

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