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In vitro analysis of the fracture resistance of CAD-CAM monolithic zirconia molar crowns with different occlusal thickness.
J Mech Behav Biomed Mater. 2016 08; 61:328-333.JM

Abstract

OBJECTIVES

To compare the fracture resistance and mode of failure of CAD-CAM monolithic zirconia crowns with different occlusal thickness.

MATERIAL AND METHODS

Forty CAD-CAM monolithic zirconia crowns with different occlusal thickness were randomly distributed into 4 experimental groups: 2.0mm (group 1), 1.5mm (group 2), 1.0mm (group 3) and 0.5mm (group 4). The restorations were cemented onto human molars with a self-adhesive resin cement. The specimens were loaded until fracture; the fracture resistance and mode of failure were recorded. The data were statistically analyzed with the one-way ANOVA followed by the Fisher׳s Exact test with Bonferroni׳s correction (p=0.05).

RESULTS

The fracture resistance values of all the specimens exceeded the maximum physiological occlusal loads in molar regions. All the crowns showed cohesive microcracks of the zirconia core; only 1 crown with a thickness of 0.5mm was interested by a complete fracture.

CONCLUSIONS

The occlusal thickness of CAD-CAM monolithic zirconia crowns did not influence either the fracture resistance and the mode of failure of the restorations; the occlusal thickness of CAD-CAM monolithic zirconia crowns can be reduced up to a lower bound of 0.5mm keeping a sufficient strength to withstand occlusal loads; CAD-CAM monolithic zirconia crowns showed sufficient fracture resistance to be used in molar regions, even in a thin configuration (0.5mm).

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Publisher Full Text (DOI)

Authors+Show Affiliations

Sorrentino R
Department of Medical Biotechnologies, School of Dental Medicine, University of Siena, Viale Bracci, 53100 Siena, Italy. Electronic address: errestino@libero.it.
Triulzio C
Department of Medical Biotechnologies, School of Dental Medicine, University of Siena, Viale Bracci, 53100 Siena, Italy. Electronic address: triulzio.clementina@gmail.com.
Tricarico MG
Department of Medical Biotechnologies, School of Dental Medicine, University of Siena, Viale Bracci, 53100 Siena, Italy. Electronic address: marella86@hotmail.it.
Bonadeo G
Department of Medical Biotechnologies, School of Dental Medicine, University of Siena, Viale Bracci, 53100 Siena, Italy. Electronic address: bonadeogianni@gmail.com.
Gherlone EF
Department of Dentistry, University "Vita Salute San Raffaele" of Milan, Via Olgettina 60, 20132 Milan, Italy. Electronic address: gherlone.enrico@hsr.it.
Ferrari M
Department of Medical Biotechnologies, School of Dental Medicine, University of Siena, Viale Bracci, 53100 Siena, Italy. Electronic address: ferrarm@gmail.com.

MeSH

Computer-Aided DesignCrownsDental PorcelainDental Prosthesis DesignDental Stress AnalysisHumansMaterials TestingMolarZirconium

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27104931

Citation

Sorrentino, Roberto, et al. "In Vitro Analysis of the Fracture Resistance of CAD-CAM Monolithic Zirconia Molar Crowns With Different Occlusal Thickness." Journal of the Mechanical Behavior of Biomedical Materials, vol. 61, 2016, pp. 328-333.
Sorrentino R, Triulzio C, Tricarico MG, et al. In vitro analysis of the fracture resistance of CAD-CAM monolithic zirconia molar crowns with different occlusal thickness. J Mech Behav Biomed Mater. 2016;61:328-333.
Sorrentino, R., Triulzio, C., Tricarico, M. G., Bonadeo, G., Gherlone, E. F., & Ferrari, M. (2016). In vitro analysis of the fracture resistance of CAD-CAM monolithic zirconia molar crowns with different occlusal thickness. Journal of the Mechanical Behavior of Biomedical Materials, 61, 328-333. https://doi.org/10.1016/j.jmbbm.2016.04.014
Sorrentino R, et al. In Vitro Analysis of the Fracture Resistance of CAD-CAM Monolithic Zirconia Molar Crowns With Different Occlusal Thickness. J Mech Behav Biomed Mater. 2016;61:328-333. PubMed PMID: 27104931.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - In vitro analysis of the fracture resistance of CAD-CAM monolithic zirconia molar crowns with different occlusal thickness. AU - Sorrentino,Roberto, AU - Triulzio,Clementina, AU - Tricarico,Maria Gabriella, AU - Bonadeo,Giovanni, AU - Gherlone,Enrico Felice, AU - Ferrari,Marco, Y1 - 2016/04/14/ PY - 2016/02/15/received PY - 2016/04/06/revised PY - 2016/04/08/accepted PY - 2016/4/23/entrez PY - 2016/4/23/pubmed PY - 2017/11/29/medline KW - CAD–CAM KW - Crown KW - Fracture resistance KW - Monolithic KW - Occlusal thickness KW - Zirconia SP - 328 EP - 333 JF - Journal of the mechanical behavior of biomedical materials JO - J Mech Behav Biomed Mater VL - 61 N2 - OBJECTIVES: To compare the fracture resistance and mode of failure of CAD-CAM monolithic zirconia crowns with different occlusal thickness. MATERIAL AND METHODS: Forty CAD-CAM monolithic zirconia crowns with different occlusal thickness were randomly distributed into 4 experimental groups: 2.0mm (group 1), 1.5mm (group 2), 1.0mm (group 3) and 0.5mm (group 4). The restorations were cemented onto human molars with a self-adhesive resin cement. The specimens were loaded until fracture; the fracture resistance and mode of failure were recorded. The data were statistically analyzed with the one-way ANOVA followed by the Fisher׳s Exact test with Bonferroni׳s correction (p=0.05). RESULTS: The fracture resistance values of all the specimens exceeded the maximum physiological occlusal loads in molar regions. All the crowns showed cohesive microcracks of the zirconia core; only 1 crown with a thickness of 0.5mm was interested by a complete fracture. CONCLUSIONS: The occlusal thickness of CAD-CAM monolithic zirconia crowns did not influence either the fracture resistance and the mode of failure of the restorations; the occlusal thickness of CAD-CAM monolithic zirconia crowns can be reduced up to a lower bound of 0.5mm keeping a sufficient strength to withstand occlusal loads; CAD-CAM monolithic zirconia crowns showed sufficient fracture resistance to be used in molar regions, even in a thin configuration (0.5mm). SN - 1878-0180 UR - https://www.unboundmedicine.com/medline/citation/27104931/In_vitro_analysis_of_the_fracture_resistance_of_CAD_CAM_monolithic_zirconia_molar_crowns_with_different_occlusal_thickness_ DB - PRIME DP - Unbound Medicine ER -