A2 Review article in a scientific journal
Biomechanical aspects of reinforced implant overdentures: A systematic review

List of Authors: Gibreel MF, Khalifa A, Said MM, Mahanna F, El-Amier N, Närhi TO, Perea-Lowery L, Vallittu PK
Publication year: 2019
Journal: Journal of the Mechanical Behavior of Biomedical Materials
Volume number: 91



The purpose of this systematic review was to
investigate the effect of reinforcement on the mechanical behaviour of
implant overdenture (IOD) bases and its cumulative biological effect on
the underlying supporting structures (implants and the residual ridge).


required documents were collected electronically from PubMed and Web of
Science databases targeting papers published in English
that focused on denture base reinforcement for IOD
prostheses in order to recognize the principal outcomes of
reinforcement on the mechanical and biological properties of
overdentures. Such biological outcomes as: strains on implants,
peri-implant bone loss, residual ridge resorption, and strain on the
residual alveolar ridge.


A total of 269
citations were identified. After excluding any repeated articles between
databases and the application of exclusion and inclusion criteria, only
13 publications fulfilled the inclusion criteria. Three publications
investigated the mechanical properties of fibre and/or metal-reinforced
implant overdentures while another 3 articles investigated the effect of
metal reinforcement on stress distribution and strains transmitted to
the underlying implants. In addition, 3 in vitro studies investigated
the effect of metal reinforcement on overdenture base strain
and stresses. Stress distribution to the residual ridge and strain
characteristics of the underlying tissues were investigated by 2 in
vitro studies. Five clinical studies performed to
assist the clinical and prosthetic maintenance of metal-reinforced
IOD were included. Data concerning denture base fracture, relining,
peri-implant bone loss, probing depth, and implant survival rates during
the functional period were extracted and considered in order to
evaluate the mechanical properties of the denture base, residual ridge
resorption and implant preservation rates, respectively.


use of a denture base reinforcement can reduce the fracture incidence
in IOD bases by enhancing their flexural properties and
reducing the overdenture base deformation. Strains on the underlying
supporting structures of overdenture prostheses including dental
implants and the residual ridge can be decreased and evenly
distributed using a metal reinforcement.

Last updated on 2019-21-08 at 22:10