Hydroxylapatite 및 Titanium Plasma Spray 피복임프란트와 골조직 계면의 조직학적 비교 연구
HISTOLOGIC COMPARATIVE STUDY ON THE BONE-IMPLANT INTERFACE OF HYDROXYLAPATITE AND TITANIUM PLASMA SPRAY COATED IMPLANTS
조주온, 송광엽, 박찬운,
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조주온 ( Cho Ju-oh ) - 전북대학교 치과대학 보철학교실
송광엽 ( Song Kwang-Yeob ) - 전북대학교 치과대학 치과보철학교실
박찬운 ( Park Charn-Woon ) - 전북대학교 치과대학 보철학교실
KMID : 0362419950330030492
Abstract
This study evaluated the responses of mandibular bones of mongrel dogs to loaded hydro xylapatite(HA) and titanium plasma spray(TPS) coated endosseous dental implants, using unloaded ones as the control group. after HA and TPS coated implants were implanted, their bone reactions with vital bones have been observed with light and scanning electron microscope(SEM) at the three periods of the 4th , 12th and 20th week. These reactions have been also compared in a histomorphometric method. The elemental distribution state of implants and the interface neighboring bone tissues have been measured with the energy dispersive analysis of X-rays(EDAX). The following results were obtained ; 1. The light microscopic analysis showed osseointegration in both the control group and the occlusal force loaded group ; Its degree was shown to be higher in the long-maintained and occlusal force groups. 2. The SEM analysis showed that both groups had osseointegration, In the case of TPS-coated implants, the coated layer was divided on the bone interface. In the case of HA-coated implants, there appeared a division between the metal and coated interface. 3. In the histomorphometric analysis, the measured ratio contaction bone of TPS-coated implants was 70±19% in the case of no occlusal force ; it was 84±13% in the case of occlusal force. The measured ratio contacting bone of HA-coated implants was 75±18% in the case of no occlusal force ; it was 94±9% in the case of occlusal force. However, there was no significant difference statistically (p>0.05). 4. Both groups showed that the ratio of calcium and phosphorous increased more in the bone tissues than on the bone to implant interface.
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