ハイドロキシアパタイトインプラントの上部構造体装着後の経過に関与する臨床的要因の検討

Abstract

In this study relation between the clinical prognoses of Hydroxyapatite coated implants (HA implants) during function and several clinical parameters evaluated at the set of superstructures were investigated to increase the predictability of implants. 181 patients inserted HA implants and engaged in the function with superstructures supported with HA implants for 5-14 years in one private dental office were evaluated. The number of implants evaluated was 566. During the examination period 54, implants (9.5%) of 33 patients failed or suffered from bone resorption after the function.On the other hand. 512 implants (90.5%) of 148 patients showed excellent prognosis. Evaluation of clinical parameters was performed at the set of superstructures. In addition, evaluation of implant bodies was also performed at the set of superstructures and at the interval of maintenance. Each clinical parameter was evaluated whether it attributed the prognoses of HA implants after the function and could be used as a guideline of predictable prognoses. Odds ratio indicated that Clinical parameters related with the prognoses of HA implants were BOP ratio (>25%), PD of residual teeth (>6mm), the existence of the furcation involvement, resorption of alveolar bone (>50%), diameter of implant body (3.25mm), and the length of implant body (8mm) . On the other hand, other parameters besides mentioned above had less relation to the prognoses of HA implants. These results suggested the parameters related with the prognosis of HA implants are useful to predict the prognosis of implant during function.