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Dent Mater. 2015 Dec;31(12):e279-88. doi: 10.1016/j.dental.2015.09.012. Epub 2015 Oct 14.

Loading capacity of zirconia implant supported hybrid ceramic crowns.

Author information

1
Institute for Dental Materials and Engineering, University Hospital for Dental Medicine, University of Basel, Hebelstrasse 3, CH-4056 Basel, Switzerland. Electronic address: nadja.rohr@unibas.ch.
2
VITA Zahnfabrik, 79713 Bad Säckingen, Germany.
3
Department for Periodontology, Endodontology and Cariology, University of Basel, Hebelstrasse 3, 4056 Basel, Switzerland.
4
Institute for Dental Materials and Engineering, University Hospital for Dental Medicine, University of Basel, Hebelstrasse 3, CH-4056 Basel, Switzerland; VITA Zahnfabrik, 79713 Bad Säckingen, Germany.

Abstract

OBJECTIVE:

Recently a polymer infiltrated hybrid ceramic was developed, which is characterized by a low elastic modulus and therefore may be considered as potential material for implant supported single crowns. The purpose of the study was to evaluate the loading capacity of hybrid ceramic single crowns on one-piece zirconia implants with respect to the cement type.

METHODS:

Fracture load tests were performed on standardized molar crowns milled from hybrid ceramic or feldspar ceramic, cemented to zirconia implants with either machined or etched intaglio surface using four different resin composite cements. Flexure strength, elastic modulus, indirect tensile strength and compressive strength of the cements were measured. Statistical analysis was performed using two-way ANOVA (p=0.05).

RESULTS:

The hybrid ceramic exhibited statistically significant higher fracture load values than the feldspar ceramic. Fracture load values and compressive strength values of the respective cements were correlated. Highest fracture load values were achieved with an adhesive cement (1253±148N). Etching of the intaglio surface did not improve the fracture load.

SIGNIFICANCE:

Loading capacity of hybrid ceramic single crowns on one-piece zirconia implants is superior to that of feldspar ceramic. To achieve maximal loading capacity for permanent cementation of full-ceramic restorations on zirconia implants, self-adhesive or adhesive cements with a high compressive strength should be used.

KEYWORDS:

CAD/CAM crown; Compressive strength; Fracture load; Hybrid ceramic; Resin composite cement; Zirconia implant

PMID:
26458762
DOI:
10.1016/j.dental.2015.09.012
[Indexed for MEDLINE]

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