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Survival of dental implants placed in sites of previously failed implants.

Journal article
Authors Bruno R Chrcanovic
Jenö Kisch
Tomas Albrektsson
Ann Wennerberg
Published in Clinical oral implants research
Volume 28
Issue 11
Pages 1348-1353
ISSN 1600-0501
Publication year 2017
Published at Institute of Clinical Sciences, Department of Biomaterials
Pages 1348-1353
Language en
Links dx.doi.org/10.1111/clr.12992
www.ncbi.nlm.nih.gov/entrez/query.f...
Keywords dental implants; implant failure; reimplantation; survival rate
Subject categories Biomaterials

Abstract

To assess the survival of dental implants placed in sites of previously failed implants and to explore the possible factors that might affect the outcome of this reimplantation procedure.Patients that had failed dental implants, which were replaced with the same implant type at the same site, were included. Descriptive statistics were used to describe the patients and implants; survival analysis was also performed. The effect of systemic, environmental, and local factors on the survival of the reoperated implants was evaluated.175 of 10,096 implants in 98 patients were replaced by another implant at the same location (159, 14, and 2 implants at second, third, and fourth surgeries, respectively). Newly replaced implants were generally of similar diameter but of shorter length compared to the previously placed fixtures. A statistically significant greater percentage of lost implants were placed in sites with low bone quantity. There was a statistically significant difference (P = 0.032) in the survival rates between implants that were inserted for the first time (94%) and implants that replaced the ones lost (73%). There was a statistically higher failure rate of the reoperated implants for patients taking antidepressants and antithrombotic agents.Dental implants replacing failed implants had lower survival rates than the rates reported for the previous attempts of implant placement. It is suggested that a site-specific negative effect may possibly be associated with this phenomenon, as well as the intake of antidepressants and antithrombotic agents.

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