In the last decade, several studies have been performed to evaluate the clinical outcome of implants inserted into grafted maxillae. A retrospective cohort study on 2,131 implants was planned to verify the impact on the clinical outcome. A total of 2,131 fixtures were inserted into native and grafted bones. Multiple implant systems were used. Five surgeons were enrolled. Kaplan Meyer and Cox analyses were used to detect those variables associated with the clinical outcome. Thirty one implants were lost (survival = 98.55%). Among the studied variables, only jaw and implant length were statistically associated with different implant survival rates. Of the remaining 2,100 implants, 304 had a peri-implant bone resorption rate that was higher than the cut-off value (success = 85.5%). The mean follow-up was 33 months. Implant site, type, length and bone type were associated to success. Bone grafts do not increase the number of lost implants in comparison with those inserted into native bone although higher bone resorption around the implant neck must be expected
COMPARISON BETWEEN IMPLANTS INSERTED INTO NATIVE AND GRAFTED BONE: A RETROSPECTIVE COHORT STUDY ON 2,131 IMPLANTS
ZOLLINO, Ilaria;CARINCI, Francesco
2011
Abstract
In the last decade, several studies have been performed to evaluate the clinical outcome of implants inserted into grafted maxillae. A retrospective cohort study on 2,131 implants was planned to verify the impact on the clinical outcome. A total of 2,131 fixtures were inserted into native and grafted bones. Multiple implant systems were used. Five surgeons were enrolled. Kaplan Meyer and Cox analyses were used to detect those variables associated with the clinical outcome. Thirty one implants were lost (survival = 98.55%). Among the studied variables, only jaw and implant length were statistically associated with different implant survival rates. Of the remaining 2,100 implants, 304 had a peri-implant bone resorption rate that was higher than the cut-off value (success = 85.5%). The mean follow-up was 33 months. Implant site, type, length and bone type were associated to success. Bone grafts do not increase the number of lost implants in comparison with those inserted into native bone although higher bone resorption around the implant neck must be expectedI documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
