Survival rate, fracture strength and failure mode of ceramic implant abutments after chewing simulation
- 3 October 2005
- journal article
- Published by Wiley in Journal of Oral Rehabilitation
- Vol. 32 (11), 838-843
- https://doi.org/10.1111/j.1365-2842.2005.01515.x
Abstract
Summary The aim of this study was to compare titanium-reinforced ZrO2 and pure Al2O3 abutments regarding their outcome after chewing simulation and static loading. Forty-eight standard diameter implants with an external hexagon were divided into three groups of 16 implants each and restored with three different types of abutments (group A: ZrO2 abutments with titanium inserts; group B: Al2O3 abutments; group C: titanium abutments). All abutments were fixated on the implants with gold-alloy screws at 32 Ncm torque, and metal crowns were adhesively cemented onto the abutments. The specimens were exposed to 1·2 million cycles in a chewing simulator. Surviving specimens were subsequently loaded until fracture in a static testing device. Fracture loads (N) and fracture modes were recorded. A Wilcoxon Rank test to compare fracture loads among the three groups and a Fisher exact test to detect group differences in fracture modes were used for statistical evaluation (P < 0·05). All specimens but one of group B survived chewing simulation. No screw loosening occurred. The median fracture loads (±s.d.) were as follows: group A, 294 N (±53); group B, 239 N (±83), and group C, 324 N (±85). The smaller fracture loads in group B were statistically significant. The use of pure Al2O3 abutments resulted in significantly more abutment fractures. It is proposed that titanium-reinforced ZrO2 abutments perform similar to metal abutments, and can therefore be recommended as an aesthetic alternative for the restoration of single implants in the anterior region. All-ceramic abutments made of Al2O3 possess less favourable properties.Keywords
This publication has 20 references indexed in Scilit:
- Wear of composite resin veneering materials in a dual‐axis chewing simulatorJournal of Oral Rehabilitation, 1999
- Single‐Tooth Replacement: Some Clinical AspectsJournal of Esthetic and Restorative Dentistry, 1997
- Esthetic High‐Strength Implant Abutments. Part IIJournal of Esthetic and Restorative Dentistry, 1993
- Esthetic High‐Strength Implant Abutments. PartiJournal of Esthetic and Restorative Dentistry, 1993
- The wear of a posterior composite in an artificial mouth: a clinical correlationDental Materials, 1986
- Development of an Artificial Oral Environment for the Testing of Dental Restoratives: Bi-axial Force and Movement ControlJournal of Dental Research, 1983
- Functional state, bite force and postural muscle activity in patients with osseointegrated oral implant bridgesActa Odontologica Scandinavica, 1979
- Functional occlusal forces: An investigation by telemetryThe Journal of Prosthetic Dentistry, 1978
- Ceramic steel?Nature, 1975
- Masticatory function—a review of the literatureJournal of Oral Rehabilitation, 1975