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Clin Implant Dent Relat Res. 2018 Feb;20(1):58-67. doi: 10.1111/cid.12572. Epub 2017 Dec 6.

Factors influencing the fracture of dental implants.

Author information

1
Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
2
Clinic for Prosthodontics, Centre of Dental Specialist Care, Malmö, Sweden.
3
Department of Biomaterials, Göteborg University, Göteborg, Sweden.
4
Department of Prosthodontics, Sahlgrenska Academy, Göteborg University, Göteborg, Sweden.

Abstract

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.

KEYWORDS:

higher grades of Ti; implant fracture; logistic models; multivariate analysis; risk factors

PMID:
29210188
DOI:
10.1111/cid.12572
[Indexed for MEDLINE]

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