Clinical study on success rate of single tooth implant

Min, Seung Ki; Cha, Jae Won; Oh, Seung Hwan

Abstract

Today, the three unit fixed bridge can no longer be considered as the standard of care for restoration of a single missing tooth. The evidence has accumulated that the single tooth implant supported replacement is more conservative, more cost effective and more predictable with respect to long-term outcome in uncomplicated case. The occlusion should be carefully assessed particularly in all excursive movement. Also, aesthetic considerations may assume great importance in some patients. The coverage of the at teeth by the lips during normal function and smiling. The purpose of this study is to review the prognosis of the endosteal osseointegrated dental implants placed in the single missing area of the maxilla and the mandible and to suspect the possible cause leading to failure. In this study, clinical comparisons were performed to evaluate implant loss in relation to implant length, size, position, bone quality, marginal bone loss. 57 osseointegrated single tooth implant that had been inserted between 2000~2003 were follow up for over 10 months. Medical records and radiographs were evaluated and analyzed. Finally, we concluded the cumulative success rate of 57 osseointegrated single tooth implant was 91.2%, 5 dental implants(8.8%) were removed. No significant difference in the success rate were found between the maxilla(92%) and the mandible(90.62%). Low success rate was found in the wide diameter(78.7%) and in the narrow diameter(83.3%). On the other side, High success rate was found in the standard diameter. The success rate were 97% in the 3.75~4.0mm. High failure rate was in the short length implants. The success rate in detail were 84.2% in the 10~12mm, 91.3% in the 13~14mm. On the other side, High success rate was found in the long length implants. The success rate of the 15~18mm were 100%. The success rate of the non-submerged type were 82%, 92.5% in the submerged type. Marginal bone resorption around the implants were 0.53mm in the 3 months, 1.37mm in the 6 months, 1.87mm in the 1 year, 1.99mm in the 2 years. The success rate was the lowest in the D4 bone (25%).