Fracture behavior of minimally invasive, posterior, and fixed dental prostheses manufactured from monolithic zirconia

• Verfasst von: Bömicke, Wolfgang [VerfasserIn]
• Verfasst von: Rues, Stefan [VerfasserIn]
• Verfasst von: Hlavacek, Verena Anna [VerfasserIn]
• Verfasst von: Rammelsberg, Peter [VerfasserIn]
• Verfasst von: Schmitter, Marc [VerfasserIn]
• Titel: Fracture behavior of minimally invasive, posterior, and fixed dental prostheses manufactured from monolithic zirconia
• Verf.angabe: Wolfgang Bömicke, Stefan Rues, Verena Hlavacek, Peter Rammelsberg, Marc Schmitter
• E-Jahr: 2016
• Jahr: 26 August 2016
• Umfang: 15 S.
• Teil: volume:28
• Teil: year:2016
• Teil: number:6
• Teil: pages:367-381
• Teil: extent:15
• Fussnoten: Gesehen am 14.05.2020
• Titel Quelle: Enthalten in: Journal of esthetic and restorative dentistry
• Ort Quelle: Oxford [u.a.] : Wiley-Blackwell, 2001
• Jahr Quelle: 2016
• Band/Heft Quelle: 28(2016), 6, Seite 367-381
• ISSN Quelle: 1708-8240
• DOI: doi:10.1111/jerd.12242
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1698238630

Abstract

Objectives To compare ultimate fracture load (Fu), load at first damage (F1d), and fracture pattern for posterior fixed dental prostheses (FDPs) manufactured from translucent, yttria-stabilized zirconia polycrystal. Methods Premolar-size FDPs in 4 test groups (n = 16/group) were constructed as veneered complete crown-retained (group 1), monolithic complete crown-retained (group 2), monolithic partial veneer crown-retained (group 3), or monolithic resin-bonded (group 4) prostheses with minimum zirconia wall thickness (0.5 mm). Adhesively cemented to metal abutments, half of the prostheses were artificially aged by use of 10,000 thermocycles (6.5°C/60°C) and 1,200,000 chewing cycles (F = 108 N), before fracture loading. Statistics included two-way non-parametric ANOVA and Dunn-Bonferroni post-hoc tests (α = 0.05). Results None of the restorations failed during artificial aging. Fu was affected by test group (p < 0.001); F1d was also affected by the factor combination of test group and aging (p = 0.001 for test group; p = 0.049 for test group*aging). Mean Fu for all groups exceeded 1000 N; it was comparable for group 1 and group 2 and statistically significantly higher for group 2 and group 3 than for group 4 (p < 0.01). Fracture usually occurred through the retainer wall. F1d = 200 N was determined for individual samples in group 1 (chipping) and group 3 (local debonding). Conclusions Fu of all the restorations was adequate for clinical use. Complications might, however, be expected at forces below 500 N for veneered prostheses (chipping) as well as for monolithic partial veneer crown-retained prostheses (local debonding). Clinical Significance With regard to fracture behavior, all-ceramic complete crown-retained fixed dental prostheses (FDP) manufactured from monolithic zirconia, with a retainer wall thickness of 0.5 mm, might be suitable for use as a conservative alternative to their veneered counterparts in the rehabilitation of posterior tooth loss. Monolithic zirconia resin-bonded FDP might, moreover, be a viable alternative to resin-bonded FDPs with metal adhesive retainers in posterior arches, with improved esthetics and biocompatibility. The performance of both should, however, be verified in clinical trials. (J Esthet Restor Dent 28:367-381, 2016)