Publication detail

Finite element analysis of bone loss around failing implants

WOLFF, J. NARRA, N. ANTALAINEN, A. VALÁŠEK, J. KAISER, J. SÁNDOR, G. MARCIÁN, P.

Original Title

Finite element analysis of bone loss around failing implants

Type

journal article in Web of Science

Language

English

Original Abstract

Dental implants induce diverse forces on their surrounding bone. However, when excessive unphysiological forces are applied, resorption of the neighbouring bone may occur. The aim of this study was to assess possible causes of bone loss around failing dental implants using finite element analysis. A further aim was to assess the implications of progressive bone loss on the strains induced by dental implants. Between 2003 and 2009 a total of 3700 implant operations were performed in a private clinic. Ten patients had 16 fixtures which developed severe marginal bone defects. Finite element analysis was used to assess the effective strains produced at the bone-implant interface under unidirectional axial loading. These simulations were carried out on 4 specific implant types – Camlog Plus, Astra Osseo Speed, Straumann BL and Straumann S/SP. All implant types displayed degraded performance under circular and horizontal bone loss conditions. This is evidenced by increased distribution of pathological strain intensities (>3000 micro-strain), in accordance with the mechanostat hypothesis, in the surrounding bone. Among the implants, the Camlog design seemed to have performed poorly, especially at the chamfer in the implant collar (>25000 micro-strain).Implants are designed to perform under nearly ideal conditions from insertion till osseointegration. However, when the surrounding bone undergoes remodelling, implant geometries can have varied performance, which in some cases can exacerbate bone loss. The results of this study indicate the importance of evaluating implant geometries under clinically observed conditions of progressive bone loss.

Keywords

dental implant; periimplantitis; finite element analysis; bone loss; implant geometry

Authors

WOLFF, J.; NARRA, N.; ANTALAINEN, A.; VALÁŠEK, J.; KAISER, J.; SÁNDOR, G.; MARCIÁN, P.

RIV year

2014

Released

1. 9. 2014

Publisher

ELSEVIER SCI LTD

Location

Oxford

ISBN

0261-3069

Periodical

Materials and design

Year of study

61

Number

22

State

United Kingdom of Great Britain and Northern Ireland

Pages from

177

Pages to

184

Pages count

8

URL

http://www.sciencedirect.com/science/article/pii/S0261306914003550

BibTex

@article{BUT107402,
  author="Jan {Wolff} and Nathaniel {Narra} and Anna-Kaisa {Antalainen} and Jiří {Valášek} and Jozef {Kaiser} and George {Sándor} and Petr {Marcián}",
  title="Finite element analysis of bone loss around failing implants",
  journal="Materials and design",
  year="2014",
  volume="61",
  number="22",
  pages="177--184",
  doi="10.1016/j.matdes.2014.04.080",
  issn="0261-3069",
  url="http://www.sciencedirect.com/science/article/pii/S0261306914003550"
}