RÉSUMÉ
PURPOSE: This retrospective study was performed to analyze the relationship between complications of the posterior mandibular single crowns and distance from the adjacent teeth to the implant. SUBJECTS AND METHODS: Of the patients who presented Ewha Womans University Mokdong Hospital and Yonsei University Dental Hospital with missing of the posterior mandibular molar and restored with implant-supported 18 Single crowns between 1996 thru 2007, 115 patients had been followed after crown delivery. The subjects were divided into complication-followed group and a control without any problems. The distance from the most distal tooth to the implant were measured. The prosthetic and biologic complications were reviewed by the cantilever distance and analyzed by abutment type, age and gender statistically using SAS version 9.1 (SAS Inc., USA). RESULTS AND CONCLUSION The results were as follows; 1) The posterior mandibular single crown with cantilever showed higher incidence of follow-up complications upon logistic analysis (p<0.05). 2) The prosthetic and biologic complications are related with the cantilever distance with 2.1 odds ratio and 3.39 cut-off value of specificity and sensitivity by SPSS 12.0. 3) The complications are neither significant in abutment types nor age and gender.