Journal of Korean Dental Science

Korean Academy of Dental Science (대한치의학회)
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Analysis of factors affecting crestal bone loss around the implants

  • Park, Ji-Hoon (Dept. of Oral and Maxillofacial Surgery, Dentistry Section, Seoul National University Bundang Hospital) ;
  • Kim, Young-Kyun (Dept. of Oral and Maxillofacial Surgery, Dentistry Section, Seoul National University Bundang Hospital) ;
  • Yun, Pil-Young (Dept. of Oral and Maxillofacial Surgery, Dentistry Section, Seoul National University Bundang Hospital) ;
  • Yi, Yang-Jin (Dept. of Prosthodontics, Dentistry Section, Seoul National University Bundang Hospital) ;
  • Yeo, In-Sung (Dept. of Prosthodontics, Dentistry Section, Seoul National University Bundang Hospital) ;
  • Lee, Hyo-Jung (Dept. of Periodontology, Dentistry Section, Seoul National University Bundang Hospital) ;
  • Park, Jin-Young (Dept. of Prosthodontics, Dentistry Section, Seoul National University Bundang Hospital)
  • Received : 2009.08.17
  • Accepted : 2009.09.28
  • Published : 2009.12.30
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Abstract

Purpose : To determine whether peri-implant crestal bone loss could be affected by systemic disease, primary ISQ value, implantation method (submerged vs. non-submerged), surface treatment, and bone density Materials and methods : Patients who underwent fixture installation from June 24, 2005 to October 23, 2008 at Seoul National University Bundang Hospital were evaluated. A total of 157 patients (male: 52, female: 85) had 346 fixtures installed. Among them, 49 patients had periapical radiographs taken 1 year after prostheses were first set. A total of 97 fixtures were implanted. In particular, 30 fixtures were installed in patients with systemic diseases such as diabetes mellitus, cardiovascular disease, hypertension, and liver disease. The immediate stability of implants was measured with $Osstell^{tm}$. Implant surface treatment was classified into two groups (RBM, Cellnest (Anodized)), and bone density, into four groups (D1~D4). The bone resorption on the mesial and distal areas of fixtures was measured with periapical radiographs using the paralleling technique, and the mean value was calculated. The length determination program in IMPAX (AGFA, Belgium) was used. Results : At least 332 out of 346 (96%) installed GS II implants were successfully osseointegrated 1 year after prostheses were first set. The mean value of the bone resorption of the installed GS II implants was 0.44mm. The minimum value was 0mm, and the maximum value, 2.85mm. There was a statistically significant difference between the implantation methods (submerged, non-submerged) with regard to the amount of alveolar bone loss 1 year after prostheses were first set (p<0.05). Non-submerged implants showed less crestal bone loss. Note, however, that other variables had no correlation with crestal bone loss (p>0.05). Conclusion : There was a statistically significant difference between the 1-stage method and 2-stage method with regard to the amount of alveolar bone loss 1 year after prostheses were first set. Systemic disease, primary ISQ value, surface treatment, and bone density were not associated with alveolar bone loss. Other variables were assumed to have a correlation with alveolar bone loss.

Keywords

References

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