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This study was conducted to evaluate the marginal bone height changes around dental implants in mandibular implant-retained complete acrylic overdentures using cone beam computed tomography (CBCT) with implementation of both immediate and delayed loading protocols in controlled type II diabetes mellitus (DM) patients. Twenty completely edentulous controlled diabetic patients were selected to participate in this study to receive mandibular implant-retained overdentures. Then, the study patients were randomly divided into two equal groups according to the loading protocol: group I, ten patients had received complete overdentures retained with two implants and two ball attachments while applying the immediate implant loading protocol and group II, ten patients had received complete overdentures retained with two implants and two ball attachments while applying the delayed implant loading protocol. For each patient, a computer-guided surgical stent was prepared for CBCT assessment to properly determine the dimensions and angulations of the two implants that were inserted in the inter-foraminal region. Afterward, the dental prosthetic was loaded, and a second CBCT was done for each patient to measure the marginal alveolar bone height. Then CBCTs were periodically performed after a period of 6 and 12 months after prosthetic loading in order to monitor the changes in marginal bone height surrounding the inserted dental implants. Statistical analysis of obtained records revealed no significant difference between the two loading protocols in the studied groups. Marginal bone height changes around immediately and delayed implant-retained mandibular over dentures seem comparable in controlled type II diabetic patients. Trial registration number: 16086; date of registry, November 2016; date of the research, June 2017

bulletin of the national research centre/bulletin of the national research center

Comparing marginal bone height changes around immediately and delayed implant-retained mandibular overdentures in controlled diabetic patients: a randomized clinical study