치아회분말 코팅된 임플란트 식립후 골유착에 대한 조직 형태학적 평가

Abstract

Implant has been developing as a treatment for edentulous area since its first introduction by Branemark in the 1960s. Now, to gain better osseo-integration, various surface treatment methods are developing. All materials added to the implant surface through many methods have the possibility of osseo-integration. The purpose of this study was to evaluate the osseointegration after the placement of a machined surface implant and the particluated-dentin coated implant in a canine model. Four dogs were randomly assigned to 2 groups and each group was further divided into 2 subgroups: 4 and 8 weeks after implantation. The implant was placed with different conditions: group 1 included the machined surface implant and group 2 included the particluated-dentin coated implant. Histologic sections and histomorphometric analysis were obtained 4 and 8 weeks after surgery. Group 2 showed a higher bone-implant contact rate and new bone formation rate than Group 1 in the 8 week group. Within Group 2, the 8 weeks-group revealed significant increases in both bone-implant contact rate and new bone formation rate than the 4 weeks-group. According to these results, particulate-dentin coated implant can prove satisfactory stability and the later stage of implant placement, the more increased the quantity of new bone and the bone maturity result than that in the early stage of implant placement.