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Abstract
Seven patients were reconstructed their occlusion with osseointegrated implant (Branemark System) in Department of Oral Surgery, Nagoya University Hospital. Three cases ofpatients have been analysed for their mandibular bone quality with Digital Image Processing (DIP) method preoperatively. Results obtained were as follows:1. Seven patients who had an extreme difficulty in wearing conventional removal dentureswere treated in this study. The subjects consisted of 3 males and 4 females, and their agesranged from 46 to 66 years.The lesion was an edentulous mandible in 3 cases, an edentulous maxilla in one case andpartially edentulous in 3 cases.2. Twenty one fixtures in maxilla and 23 fixtures in mandible, totally 44 fixtures wereinstalled in 7 cases.One fixture in mandible and one in maxilla failed to osseointegrate, giving the fixture survivalrate of 95.2% in mandible and 95.7% in maxilla.3. Three edentulous mandibular patients received the bone quality analysis (DIP method) using occlusal film preoperatively. Results of bone density were 2.98, 1.98, 3.10Almm in eachcase.Case 2 who had the lowest bone density failed one fixture to osseointegrate.4. DIP method was very useful as a bone quality measuring method. Because it could beeasily carried out to analyse the jaw bone quality for dental implant without any variation offilm conditions.
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