Implant Success Rate in a Dental School Setting: Retrospective Study

Implant Success Rate in a Dental School Setting: Retrospective Study
S. ANDREANA, State University of New York - Buffalo, USA, and C. BENEDUCE, Erie Community College, School of Dental Hygiene, Williamsville, NY, USA
2005
IADR
Aim: aim of this study was to retrospectively assess the rate of implant survival in a dental school post-graduate clinic, and to examine the health status of the patients.
Materials and Methods: 133 of 157 charts of patients who received implants at the School of Dental Medicine at the University at Buffalo from 1997 to March 2004 were randomly selected and reviewed. The study was approved by the local IRB. 133 patients received a total of 302 implants. Average age at time of insertion was of 56.04 years old (range 18-86). Age was divided into five age groups, up to 20 y.o., 21-40, 41-60, 61-80, 81 and higher.
Results: Median age range was 41-60 years old with 69 patients followed by 61-80 y.o. with 53 subjects. 59.4% of the subjects were female, 111 were medically compromised (83.5%) including 24 active and 20 former smokers. Thirty-five interventions of bone augmentation were performed prior to implant placement and 88 at time of insertion. 68.9% of the implants were placed in the maxilla. 42 implants were placed immediately after extractions. The average follow-up was of 2.5 years. Eight implants failed and were removed resulting in a 97.5% implant survival. Three failures were for the same patient. 4 implants were from augmented area. 3 implants failed in three smokers and 1 in a former smoker. Conclusion: The results showed that rate of implant survival in a post-graduate dental school setting is very high (97.5%) considering that majority of subjects (83.5%) are medically compromised.