임플랜트의 표면처리에 따른 골반응에 관한 RFA 및 조직학적 연구

Abstract

Titanium and titanium alloy are widely used as materials for dental implants because of the advantages of their mechanical properties and excellent anchorage into the jaw bone. In the clinical application of dental implant, many attempts have been made to improve bone anchorage of dental implants to reduce the treatment time and improve the success rate in areas with poor bone quality. Recent studies have shown that the existence of a certain surface roughness increase bone-to-implant contact, mainly in the earlier phases of the osseointegration. The purposes of this study were to investigate the bone response around dental implants with two different surface treatment to evaluate the biocompatability. In this study, ABE(Advanced Blasting and Etching) H-R8.5 implants(Warantec, Seoul, Korea) and SLA(Sandblasted, Large-grit, and Acid-etched) ITI implants(Straumann, Waldenburg, Switzerland) were placed in rabbit tibia. The resonance frequency was measured every 1 month during 3 months after implant placement. After 3 months, the bone response around implants was evaluated with histomorphometric analysis. The results obtained was as follows 1. The histomorphometric analysis in 3 months after implant placement revealed that both H-R8.5 implants and ITI implants showed relatively even bone contact from the bottom to the top of implants. No foreignbody reaction and inflammatory cell infiltration were observed. 2. As a result of the histomorphometric analysis, bone to implant contact percentages for ITI implants and H-R8.5 implants were 74%, 72% respectively. 3. As a result of the RFA value measured every 1 month, H-R8.5 implants showed relatively higher RFA value than ITI implants through the observation period from the implant placement to 3 months after. 4. RFA value for H-R8.5 implants showed a tendency to decrease from 4 weeks to 8 weeks, and increase from 8 weeks to 12 weeks. For ITI implants, RFA value showed a tendency to increase with time but was relatively lower than that of H-R8.5 implants after 12 weeks