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KMID : 0360120070290050383
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Journal of the Korean Society of Maxillofacial Plastic Reconstructive Surgeons
2007 Volume.29 No. 5 p.383 ~ p.393
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Effects of different oxidized surfaces of implant on osseointegration: resonance frequency and histomorphometric analysis study in mini-pigs
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Kwon Kyeng-Hwan
Min Seung-Ki
Sung Dae-Hyuk
Choi Jae-Young
Choi Sung-Rym
Cha Su-Ryeon
Oh Hee-Kyun
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Abstract
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The aim of the present study is to investigate the effect of anodized surface of osseointegration implants by using of resonance frequency analysis (RFA) and histomorphometric analysis. A total of 96 screwshaped implants were devided into 4 groups. Seventy-two implants were prepared by electrochemical oxidation with 3 different ways; Group 1 (n=24) were prepared at galvanostatic mode in 0.25M sulfuric acid and phosphoric acid, Group 2 (n=24) were prepared at galvanostatic mode in calcium glycerophosphate and calcium acetate, and Group 3 (n=24) were prepared at galvanostatic mode in 0.25M sulfuric acid and phosphoric acid followed by Calcium metaphosphate(CMP) coating. Control group (n=24) were the RBM surfaced implants. The implants were placed in the mandibles of 12 mini pigs. Bone tissue responses were evaluated by resonance frequency analysis(RFA) and histomorphometric analysis that were undertaken at 2, 4 and 6weeks after implant placement. The following result were obtained. 1. Twenty-two of 96 implants (4 in control group, 5 in group 1, 7 in group 2, and 6 in group 3) were failed due to faliure of osseoitegration. The failure rate of osseointegration was 22.9%. 2. The mean values of RFA in control, group 2 and groups 3 showed the similar values, but there was no significant difference among groups. 3. Histomorphometric evaluation demonstrated significantly higher bone-to-implant contact ratio in group 2 at 3 and 4 weeks after implant placement than other groups (p<0.05), but there was no significant difference among groups at 6weeks after implant placement.
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KEYWORD
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Anodized surface, Resonance frequency analysis, RFA, Calcium metaphosphate, CMP, Resorbable blast media, RBM
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