성견 하악골에서 다양한 표면처리에 따른 임플란트 골유착에 관한 비교 연구

Abstract

I. Purpose For the successful osseointegration, surface treatment of the implants is important element. This study was performed for comparing the osseointegration and implant stability according to various surface treatment of the implants on the mandible of dogs and for guiding to select implant in clinic.

II. Material and methods Six adult dogs were selected and used implants were classified by types of surface treatment. They are resorbable blast media(RBM), hydroxyapatite(HA), hydrothermal treated hydroxyapatite, sand-blasted and acid-etched(SLA) groups. Total 48 implants, 12 implants per each groups were installed on both mandible divided 2, 4weeks groups. Each implant was evaluated for stability, one of 6 dogs was used for measuring removal torque value and the rest for histomorphological study.

III. Results Radiographically taking standard X-ray, 5 implants of total 48, showed marginal bone resorption, the rest appeared good healing state. In clinical implants' stability evaluation, all groups had generally satisfactory value. In histomorphological evaluation, via light microscope, highest new bone forming ratio on whole fixture was measured in hydroxyapatite surface implant group. Bone to implant contact showed high ratio at implant's upper 1/2 area in hydrothermal hydroxyapatite surface implant group.

IV. Conclusion As a result of histological analysis, hydrothermal processing could improve the bone to implant contact ratio on upper fixture that mainly determine the implant stability.