Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
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Observation of the change of the dental implant stability and bone density evaluation methods

골밀도 평가방법과 임플란트 안정성 변화의 관찰

  • Ko, Sok-Min (Department of Dentistry, School of Medicine, Ajou University) ;
  • Park, Sung-Jae (Department of Dentistry, School of Medicine, Ajou University) ;
  • Kim, In-Soo (Department of Dentistry, School of Medicine, Ajou University) ;
  • Song, Seung-Il (Department of Dentistry, School of Medicine, Ajou University) ;
  • Lee, In-Kyung (Department of Dentistry, School of Medicine, Ajou University)
  • 고석민 (아주대학교 의과대학 치과학교실) ;
  • 박성재 (아주대학교 의과대학 치과학교실) ;
  • 김인수 (아주대학교 의과대학 치과학교실) ;
  • 송승일 (아주대학교 의과대학 치과학교실) ;
  • 이인경 (아주대학교 의과대학 치과학교실)
  • Published : 2009.06.30
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Abstract

Purpose: The aim of this study was to examine the correlation of the subjective and the objective evaluation of edentulous ridge bone quality, and to evaluate the change of the dental implant stability in each bone density group for early healing period after implant installation. Methods: Sixty-seven implants(Osstem implant$^{(R)}$, Seoul, Korea) were included in this study. We evaluated the bone density by 2 methods. The one was the subjective method which was determined by practitioner s tactile sense, the other was the objective bone type was based on Hounsfield units. The implant stability in each bone type group was assessed by resonance frequency analyzer(Osstell mentor$^{(R)}$). Data were analyzed for the change of the implant stability, and they were compared to verify the difference of groups at the time of installation, 2, 6, 10, 14 weeks postoperatively. Spearman's correlation was used to demonstrate the correlation between the subjective and the objective evaluation of the bone density, and analysis of variance(ANOVA) was used to analyze the differences of implant stability at each time point. Results: There was no close relation between the subjective and the objective evaluation of the bone density(r=0.57). In the subjective groups, there was statistically significant difference between the type 1 and 3 at 10 weeks and between the type 2 and 3 at 14 weeks. In the objective groups, there was no statistically significant difference between the D 1, 2, 3, 4, and 5 group with regard to RFA from baseline to 14 weeks(P>0.1). Conclusions: The implant stability increased over time during the study, and it was improved with bone density proportionally after 2weeks postoperatively. It is recommended that the decision of bone density is base on Hounsfield unit for implant loading time.

Keywords

References

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