Abstract
ObjectiveThis study aims to evaluate the prognosis of single cantilevered restoration, of which the cantilever length is less than 6mm, retrospectively. MethodsThis study targeted 33 patients (20 males, 13 females) who were treated with total 35 single cantilevered restorations (mesial direction or distal direction) combined with implant installations from May 2004 to December 2012. All of the implant prostheses were single implant–supported and cantilevered(cantilever lengths were over 3mm). ResultsThe length of cantilevers ranged from 3.01mm to 5.99mm. All implants survived during the average of 47.72 months of observation period. The success rate of implants was 94.29%. The complications were peri-implantitis (8.57%) with symptoms such as swelling and bleeding and prosthetic complications (22.9%) such as screw loosening, abutment hex fracture, screw locking, and crown fracture. There was an average of 0.04±0.14mm peri-implant alveolar bone loss at 1year after loading and 0.16±0.51mm at final observation. ConclusionsAlthough single cantilevered restoration shorter than 6mm does not induce crestal bone loss around the implant, several complications such as peri-implantitis and mechanical complications could still remain.
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