Investigation of Success of  Immediate Placement of Dental Implants

Objectives: to compare clinical outcomes of conventional and immediate placement of dental implants in a group of Iranian war wounded.

Methods: In a cross-sectional study, 42 war wounded patients referred to a dental implant clinic in Tehran from March 2000 to March 2007 were enrolled. For each patient a questionnaire was filled. Finally univariate and then multivariate analysis of clinical outcome of implantation was done.

Results: In the univariate analysis of the assessed 271 implants, only associated interventions had a significant effect (P-value = 0.018) while use of graft (P-value = 0.071), method of implantation (P-value = 0.054) and length of implant (P-value = 0.057) had a trend toward significant relation with clinical outcome of implantation. Logistic regression model showed that use of graft and longer implants were independently associated with clinical failure of implantation.

Conclusions: In our study with limited follow-up period three percent of implants were failed clinically. Rate of failure showed a trend toward higher rates for immediately placed implants compare to delayed placed implants. Besides, use of grafts during associated interventions was associated with higher probability of clinical failure which could show that these interventions could even worsen the clinical outcome of implantation. The finding that longer implants had higher rates of failure could be related to disturbed data entry in our questionnaires.