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J Clin Periodontol. 2018 Feb;45(2):225-232. doi: 10.1111/jcpe.12829. Epub 2017 Dec 5.

Restoration contour is a risk indicator for peri-implantitis: A cross-sectional radiographic analysis.

Author information

1
Department of Periodontics, University of Washington, Seattle, WA, USA.
2
Department of Oral Health Sciences, University of Washington, Seattle, WA, USA.
3
Department of Restorative Dentistry, University of Washington, Seattle, WA, USA.

Abstract

AIM:

The purpose of this study was to determine whether restoration emergence angle was associated with peri-implantitis.

MATERIALS AND METHODS:

A data set consisting of 96 patients with 225 implants (mean follow-up: 10.9 years) was utilized. Implants were divided into bone-level and tissue-level groups, and radiographs were analysed to determine the restoration emergence angles, as well as restoration profiles (convex or concave). Peri-implantitis was diagnosed based on probing depth and radiographic bone loss. Associations between peri-implantitis and emergence angles/profiles were assessed using generalized estimating equations.

RESULTS:

Eighty-three patients with 168 implants met inclusion criteria. The prevalence of peri-implantitis was significantly greater in the bone-level group when the emergence angle was >30 degrees compared to an angle ≤30 degrees (31.3% versus 15.1%, p = .04). In the tissue-level group, no such correlation was found. For bone-level implants, when a convex profile was combined with an angle of >30 degrees, the prevalence of peri-implantitis was 37.8% with a statistically significant interaction between emergence angle and profile (p = .003).

CONCLUSIONS:

Emergence angle of >30 degrees is a significant risk indicator for peri-implantitis and convex profile creates an additional risk for bone-level implants, but not for tissue-level implants.

KEYWORDS:

dental implant; dental prosthesis; implant-supported; peri-implantitis; prevalence; risk factors

PMID:
28985447
DOI:
10.1111/jcpe.12829
[Indexed for MEDLINE]

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