Use of Abutment-teeth vs. Dental Implants to Support All-ceramic Fixed Partial Dentures: An In-vitro Study on Fracture Strength

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Use of Abutment-teeth vs. Dental Implants to Support All-ceramic Fixed Partial Dentures: An In-vitro Study on Fracture Strength

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Publication Article, peer reviewed scientific
Title Use of Abutment-teeth vs. Dental Implants to Support All-ceramic Fixed Partial Dentures: An In-vitro Study on Fracture Strength
Author(s) Vult von Steyern, Per ; Kokubo, Yuji ; Nilner, Krister
Date 2005
Swedish abstract
The aim of the present in-vitro study was to compare the fracture strength of all-ceramic Fixed Partial Dentures supported by tooth-analogues and periodontal membrane with the same supported by dental implants. As ceramics are highly brittle, they cannot withstand deformations of more than 0.1% without fracturing. Hence, when planning an all-ceramic FPD, it is essential to evaluate abutment sup-port, as the fracture strength of all-ceramic constructions depends on the stability of the support to reduce strain in the beam of the prosthe-sis. The support provided by implants differs, however, from the sup-port provided by natural teeth as the implants are anchored directly in the bone with no intermediate tissue. One question that arises is whether strain and stress in the prosthesis are lower when the prosthe-sis is loaded on implants compared to natural teeth and hence if all-ceramic FPDs benefit from implant support. Twenty-four three-unit all-ceramic FPDs-12 supported by two dental implants and 12 by two tooth-analogues serving as end abutments-were made. All FPDs were subjected to preloading in a preloading procedure and subsequently subjected to load until fracture occurred. Load at fracture were regis-tered and comparisons between the two groups were made. The loads at fracture were statistically significant higher in the group supported by implants compared to the group supported by tooth-analogues (p = 0.003). Within the limitations of this in-vitro study, the following con-clusions can be drawn: All-ceramic fixed partial dentures can be used in combination with dental implants. The solid support gained from implants might thus be beneficial for the outcome of such treatment due to decreased strain and stress levels in the prosthesis when loaded on implants compared to when loaded on natural teeth. Clinical stud-ies are, however, needed to confirm these findings as there are more factors that influence the final clinical outcome.
Host/Issue Swedish dental journal;2
Volume 29
ISSN 0347-9994
Pages 53-60
Language eng (iso)
Subject(s) Medicine
Research Subject Categories::ODONTOLOGY
Handle http://hdl.handle.net/2043/7859 (link to this page)

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