Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
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Effect of the early exposure of cover screws on the survival rate of implants

덮개 나사 조기 노출이 임플란트의 생존율에 미치는 영향

  • Kim, Yong-Gun (Department of Periodontology, College of Dentistry, Kangnung National University) ;
  • Lee, Jae-Kwan (Department of Periodontology, College of Dentistry, Kangnung National University) ;
  • Chang, Beom-Seok (Department of Periodontology, College of Dentistry, Kangnung National University) ;
  • Um, Heung-Sik (Department of Periodontology, College of Dentistry, Kangnung National University)
  • 김용건 (강릉대학교 치과대학 치주과학 교실) ;
  • 이재관 (강릉대학교 치과대학 치주과학 교실) ;
  • 장범석 (강릉대학교 치과대학 치주과학 교실) ;
  • 엄흥식 (강릉대학교 치과대학 치주과학 교실)
  • Published : 2006.12.31
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Abstract

The early exposure of cover screws is a common complication of 2-stage implant technique. The exposure of cover screws between stage I and IT surgery may cause inflammation in the soft tissues surrounding the implants, and lead to peri-implantitis or marginal bone loss. The purpose of this study was to evaluate the effect of the early exposure of cover screws on implants placed using 2-stage technique. Two hundred and nineteen implants in 77 patients were examined for cumulative survival rate, radiographic marginal bone level change, cause and frequency of the early exposure. The results were as follows: 1. Twenty-five implants showed early exposure of cover screws with a frequency of 11.4%. 2. Cumulative survival rate of the implants with early cover screw exposure was 88.0%, and that of the implants without cover screw exposure was 96,9%. 3. At the time of stage IT surgery and 1 year after loading, the marginal bone loss was greater around the implants with early exposure of cover screws than around the implants without cover screw exposure(p <0.05), 4, There was no statistically significant difference in the frequency of the early exposure according to the implant diameter, gender, and smoking(p >0,05).

Keywords

References

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