アパタイトセラミックスによる前頭どう骨欠損部の形成 ２症例の経験

Abstract

A large bony defect of the frontal sinus gives rise to a local retraction of the forehead unless the plastic reconstruction is performed. The pelvic bone, which is mainly used for this purpose as an autograft, has the following problems, that is, a new surgical intervention is necessary, and a large bone fragment is hard to get in the case with a wide frontal defect, and the cosmetic reconstruction is not always satisfactory. On the other hand, use of exogenous materials has not been popular for this kind of plasty because of their poor biocompatibility.Apatite ceramics have been attracted a special attention as a prosthetic inlay on account of its good biostability and biocompatibility. This led us to use apatite ceramics for the reconstruction of the bony defect of the frontal sinus.2 cases of clinical experience are reported. A porous apatite plate with 4mm. in thickness and 55% of pore rate was used. This plate has a curvature to fit to the forehead. After trimming of the apatite plate, it was inserted into the bony defect and periosteum was then sutured to cover it. Follow-up periods on these cases are 7 months and 4 months respectively, and patients are in the uneventful condition without infection or extrusion. This material seemed to be useful in the reconstruction of the bony defect of the frontal sinus.We propose that apatite seramics can be applied not only to the frontal sinus but to many other reconstructive surgeries.