Survival rate of short and long dental implants in chilean population.

Abstract

The use of short dental implants is often related with lower survival rates than the larger ones. However recent studies have reported dissimilar results. Aim of this study is to evaluate survival of long and short implants over a period of 12 years. Methods: Survival study of a retrospective cohort in a sample of 78 consecutively treated edentulous individuals each ones with long and short implants between 1997 and 2009, following the Branemark protocol, 548 implants were inserted (Branemark System), 396 long (>10mm with a diameter of 3.75 to 4.0mm) and 152 short implants (<8.5mm with a diameter of 3.75 to 4.0mm). In 377 implants, the surface was machined and oxidized at 171. Data analysis was performed with SPSS 15.0 software. And p<0.05 was considered significant. Results: The survival rate for short implants was 77%, while for long implants was 94.9%. And the comparison between them by means the Mantel & Cox test was significant. Conclusions: Apparently implant length is related to survival. Prospective studies should focus on identifying risk factors for failure of osseointegration.

Keywords

• implant
• survival
• failure
• length
• Chile.