Long-term clinical outcomes of single short implants in the mandibular molar area

Abstract

Purpose: This retrospective study evaluated a long-term result of single short implants in the mandibular molar area. Materials and Methods:The patients enrolled in this study had received 7-and 8-mm single short implants between November 2005 and February 2014. The clinical results were analyzed according to the length of implants, including survival and success rates and marginal bone loss. The cumulative survival rates were measured using the Kaplan-Meier survival curves, the success rate was analyzed according to the criteria of Albrektsson, and marginal bone loss was evaluated by the paralleling cone technique.Results: Eighty-one implants and patients (58.4±11.5 years) were analyzed. All mesiodistal cantilevers of prosthetics were within 3 mm. Over an average period of 7.0±2.8 years, the marginal bone loss was 0.5±0.8 mm. Failure occurred for three implant complications at 0.3, 1.2, and 10.2 years after the loading, respectively. The other complications occurred on one implant with screw loosening after two years and another implant with peri-implantitis after 2.2 years. On the other hand, the clinical outcomes of the 7 and 8 mm implants were not significantly different, including marginal bone loss (0.5±1.2 and 0.5±0.6 mm), survival rate (93.8±24.6 and 98.0±14.3%), and 10-year cumulative survival rates (96.4±3.5 and 97.6±20.2%).

Mandibular second molar rehabilitation using an ultra-short implant in a treated area of medication-related osteonecrosis of the jaw: A case report

“…Generally, implants with lengths ranging from 6 mm to 8 mm are referred to as short implants. Success rate of short implants is generally known to be comparable to that of longer implants 1,2) . Among short implants, ultra-short implants are those with lengths less than 6 mm.…”

A retrospective study on the factors associated with marginal bone loss of short implants placed in posterior regions

“…shown that short implants have high survival rates, with a low incidence of prosthetic and biological complications [11][12][13][14][15] . However, implant survival is a minimal crite- .…”