Retrospective clinical study on survival rate of osseointegrated dental implants in the early post

Background

The survival rate is the rate of remaining implants in mouth at removing or determining to remove failure implants, and it doesn't mean the success rate that is the rate of implants satisfying the success criteria after specific time.

Aim/Hypothesis

The aim of the present review was to evaluate survival rate and factors associated with survival of osseointegrated implants placed in the total and partial edentulous area of maxilla and mandible and to suspect the possible causes leading to failure.

Material and Methods

A total of 2,158 endosseous implants that had been inserted between 2004 through 2013 were placed in 770 patients. The clinical comparisons were performed to evaluate implant loss in relation to age and gender of patients, position, system, length and diameter of implant, and bone graft technique.

Results

Finally, we concluded the early survival rate of 2,158 osseointegrated dental implant was 97.96%. The survival rate were 96.98% in the posterior area of maxilla and 98.76% in the posterior area of mandible(P < 0.05). The high survival rates were 98.86% and 98.68% in the GS II® with RBM surface, Implantium® with SLA surface, especially. However, low survival rate was 88.46% in Implantium® with anodizing surface (P < 0.05). There were high survival rates from the 3 mm diameter to 4.5 diameter implants with significant statistical difference (P < 0.05). The high survival rates of the implants between 9 to 11 mm and 11 to 13 mm were showed 98.12 and 98.17%, especially, but there were no significant difference statistically. There were 89.51%, 98.28% and 99.27% of the survival rates of implants in the group with sinus graft only, the group with GBR only and the group without bone graft, especially with significant statistical difference (P < 0.05).

Conclusion and Clinical Implications

According to these findings, this study establishes a relationship between survival rate of implant and position, surface characteristics and diameter of implant system and bone graft technique.