• 구강회복응용과학지
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• 제29권3호
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• pp.272-279
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• 2013

골치유 기간 중 임플란트-골 계면에서 일정 수준 이상의 미세동요가 발생하게 되면 임플란트의 골유착이 방해받게 되므로 임플란트 식립 후 초기 골반응에 관해 임플란트 안정성은 하나의 지표가 된다. 본 연구의 목적은 임플란트 식립 후 전향적인 연구를 통해 초기 임플란트 안정성 변화를 추적하여 골치유 양상을 추론하고자 하였다. 총 26명의 환자에게 식립된 30개의 임플란트를 대상으로 하악골에 1회법으로 식립 직후 1주 간격으로 12주간 공진주파수분석을 시행하여 초기 안정성의 변화를 구하였으며 식립 직후와 1개월 간격으로 변연골 흡수 정도를 방사선학적 방법으로 측정하였다. 식립 직후와 각 치유기간 동안의 ISQ값 비교에서 식립 4주에서 6주사이에 골질에 따른 차이를 보였으나(P<0.05), 6주 이후에는 골질군 간에는 임플란트 안정성 변화에 차이가 없었다(P>0.05). 방사선학적 검사에서는 변연골의 차이가 관찰기간내에 유의하게 변화하지 않았다(P>0.05). 임플란트 식립 후 초기 골치유과정은 골흡수과정에 연속적인 과정으로 4주 이후 바람직한 골치유과정이 진행됨을 공진주파수분석으로 관찰할 수 있었다.

• 대한치과보철학회지
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• 제45권3호
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• pp.362-374
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• 2007

Statement of problem. The intial stability for osseointegration of implant has been an interesting factor. Especially, in the case of poor bone quality or immediately loaded implant, various strategies have been developed focusing on the surface of materials to improve implant fixation to bone. The microscopic properties of implant surfaces play a major role in the osseous healing of dental implants. Purpose. The aims of this study are to perform a histologic and histomorphometric comparison of the healing characteristics of three different surfaces and the comparison of resonance frequency analysis (RFA) values measured by $Osstell^{TM}$ and perio-test values (PTV) measured by Periotest. Material and methods. A total of 24 screw titanium implants (Dentium Co., Seoul, Korea) with 6mm in length and 3.4mm in diameter, were placed in the mandible of 4 beagle dogs. Implants were divided into three groups following the surface treatment methods: Group I is machined(control group). Group II is anodically oxidized. Group III is coated 500nm in thickness with hydroxyapatite(HA) by ion beam assisted deposition(IBAD) on the anodized oxidization. Bone blocks from 2 dogs were caught after 3 weeks of covered healing and another blocks from 2 dogs after 6 weeks. RFA values and PTV were measured right after insertion and at 3 and 6weeks. Histomorphometric analysis was made with Kappa Image Base System to calculate bone-to-implant contact (BIC) and bone area inside the threads. Pearson's correlation analyses were performed to evaluate the correlation between RFA and PTV, BIC and bone area ratio of three different surfaces at 3 and 6 weeks. Results. 1) In all surface treatment methods, the RFA values decreased and the PTV values increased until 6 weeks in comparison to initial values. 2) At 3 weeks, no significant difference was found from bone-to-implant contact ratio and bone area ratio of three different surface treatment methods(P>0.05). However, at 6 weeks, different surface treatment methods showed significantly different bone-toimplant contact ratio and bone area ratio(P<0.05). 3) In the implants with the IBAD on the anodic oxidization, significant difference was found between the 3 weeks and the 6 weeks bone area ratio(P<0.05). 4) Correlation was found between the RFA values and the bone area ratio at 3 and 6 weeks with significant difference(P<0.05). Conclusions. These results indicate that the implants with the IBAD on the anodic oxidization may have a high influence on the initial stability of implant.