インプラント治療前の顎骨評価に関する臨床的研究 : DIP法を応用した下顎骨診査

概要

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Preoperative evaluation of the jaw bone is one of the important factors for dental implant therapy.However, there is no conclusive indicator to assess the quality of the jaw bone.We had a trial to measure the bone density of the mandible with the Digital Image Processing method (DIP method) which had been developed for the bone measurement of osteoporosis.<BR>Occlusal radiograms of edentulous mandibles in 10 healthy subjects (male: 3, female: 7, Age: 59-84 years old) were taken with an aluminum wedge on the same films.And the bone mineral content and three dimensional patterns of the bone density were obtained by the DIP method.<BR>The 3-D patterns of the edentulous mandibles depended upon individuals and showed a wide variety.These could be classed into 5 groups.<BR>These facts suggest that it is necessary to assess the bone quality of the recipient site itself, and the DIP method for the mandible is useful to preoperative evaluation for dental implant therapy.