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Factors influencing the fracture of dental implants
Author(s) -
Chrcanovic Bruno Ramos,
Kisch Jenö,
Albrektsson Tomas,
Wennerberg Ann
Publication year - 2018
Publication title -
clinical implant dentistry and related research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.338
H-Index - 85
eISSN - 1708-8208
pISSN - 1523-0899
DOI - 10.1111/cid.12572
Subject(s) - implant , medicine , dentistry , fracture (geology) , orthodontics , incidence (geometry) , surgery , materials science , mathematics , geometry , composite material
Background Implant fractures are rare but offer a challenging clinical situation. Purpose To determine the prevalence of implant fracture and the possible risk factors predisposing an implant to a higher fracture risk. Materials and Methods This retrospective study is based on 2670 patients consecutively treated with implant‐supported prostheses. Anatomical‐, patient‐, and implant‐related factors were collected. Descriptive statistics and survival analyses were performed. Generalized estimating equations (GEE) evaluated the effect of explanatory variables on implant fracture. Results Forty‐four implants (out of 10 099; 0.44%) fractured. The mean ± standard deviation time for fracture to occur was 95.1 ± 58.5 months (min‐max, 3.8‐294.7). Half of the occurrences of fracture happened between 2 and 8 years after implantation. Five factors had a statistically significant influence on the fracture of implants (increase/decrease in fracture probability): use of higher grades of titanium (decrease 72.9%), bruxism (increase 1819.5%), direct adjacency to cantilever (increase 247.6%), every 1 mm increase in implant length (increase 22.3%), every 1 mm increase in implant diameter (decrease 96.9%). Conclusions It is suggested that 5 factors could influence the incidence of implant fractures: grade of titanium, implant diameter and length, cantilever, bruxism.