임플란트 식립 부위의 골밀도 평가에 관한 연구

박수원; 장수미; 최병환; 손한나; 박봉찬; 김창환; 손장호; 성일용; 이지호; 조영철

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임플란트 식립 부위의 골밀도 평가에 관한 연구
The study of bone density assessment on dental implant sites

대한구강악안면외과학회지 2010년 36권 5호 p.417 ~ 422

박수원, 장수미, 최병환, 손한나, 박봉찬, 김창환, 손장호, 성일용, 이지호, 조영철,

소속 상세정보

박수원 ( Park Su-Won ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
장수미 ( Jang Soo-Mi ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
최병환 ( Choi Byoung-Hwan ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
손한나 ( Son Han-Na ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
박봉찬 ( Park Bong-Chan ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
김창환 ( Kim Chang-Hwan ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
손장호 ( Son Jang-Ho ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
성일용 ( Sung Iel-Yong ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실
이지호 ( Lee Ji-Ho ) - 울산대학교 의과대학 산업의학과
조영철 ( Cho Yeong-Cheol ) - 울산대학교 의과대학 울산대학교병원 구강악안면외과학교실

KMID : 0355620100360050417

Abstract

Introduction: Bone density is one of the important factors for the long term success of endosseous implants. The bone density varies from site to site and from patient to patient. A preoperative evaluation of the bone density is quite useful to oral surgeons for planning dental implantation. More accurate information on the bone density will help surgeons identify suitable implant sites, thereby increase the success rate of dental implantation. This study examined the correlation between the bone density measured preoperatively by computed tomography (CT) and the implant primary stability measured by resonance frequency analysis. Furthermore, the effects of the implant sites, gender, age and generalized systemic disorder patients on the bone density and primary implant stability were examined.

Materials and Methods: One hundred and fourteen patients were selected. None of the patients had undergone a tooth extraction or bone graft history in the previous year. Preoperatively, the patients underwent CT scanning to evaluate the Hounsfield unit (HU), and resonance frequency analysis (RFA) was used to evaluate the implant primary stability at the time of implant installation. All implants were 4.0 mm diameter and 11.5 mm length US II. All patients were recorded and the HU and implant stability quotient (ISQ) value were evaluated according to the sites, gender and age.

Results: The highest HU values were found in the mandibular anterior site (827.6±151.4), followed by the mandibular lar site (797±135.1), mandibular premolar site (753.8±171.2), maxillary anterior site (726.3±154.4), maxillary premolar site (656.7±173.8) and maxillary molar site (621.5±164.9). The ISQ value was the highest in the mandibular premolar site (81.5±2.4) followed by the mandibular molar site (80.0±5.7), maxillary anterior site (77.4±4.1), mandibular anterior site (76.4±11.9), maxillary premolar site (74.2±14.3) and maxillary molar site (73.7±7.4). The mean HU and ISQ value were similar in females and males. (HU: P=0.331, ISQ: P=0.595) No significant difference was also found in the age group respectively. However, the correlation coefficients between the variables showed a closed correlation between the HU and ISQ value.

Conclusion: These results showed close correlation between the bone density (HU) and primary stability value (ISQ) at the time of implant installation (Correlation coefficients=0.497, P＜0.01).
These results strengthen the hypothesis that it might be possible to predict and quantify the initial implant stability and bone density from a presurgical CT diagnosis.