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Influence of cementation on in vitro performance, marginal adaptation and fracture resistance of CAD/CAM-fabricated ZLS molar crowns.
Dent Mater. 2015 Nov; 31(11):1363-9.DM

Abstract

OBJECTIVES

This study investigated the influence of conventional cementation, self-adhesive cementation, and adhesive bonding on the in vitro performance, fracture resistance, and marginal adaptation of zirconia-reinforced lithium silicate (ZLS) crowns.

METHODS

Human molar teeth (n=40) were prepared and full-contour crowns of a ZLS ceramic (Celtra Duo, DeguDent, G, n=32) and a lithium disilicate ceramic (LDS; IPS e.max CAD, Ivoclar-Vivadent, FL, n=8) were fabricated and glazed. Four groups of ZLS crowns were defined (n=8/group) and cemented with different glass-ionomer cements, resin, and resin-modified self-adhesive luting materials. The LDS crowns served as reference group with adhesive bonding. A combined thermal cycling and mechanical loading (TCML: 3000×5°C/3000×55°C; 1.2×10(6) cycles à 50N) with human antagonists was performed in a chewing simulator. Fracture force of surviving crowns was determined. Marginal adaptation at the cement/tooth and cement/crown interface was investigated by scanning electron microscopy before and after TCML, and the share of perfect margins was determined. Data were statistically analyzed (one-way ANOVA; post hoc Bonferroni, α=0.05).

RESULTS

One crown of the adhesive group failed during TCML (879,000 cycles=3.7 years). No statistically significant (p=0.078) differences in fracture resistance were found between different cementations, although highest data in tendency were found for adhesive bonding. Shares of perfect margins at the cement/tooth (93.8±5.6-99.6±0.8%) and cement/crown (84.7±6.6-100.0±0.0%) interfaces did not differ significantly (p>0.05) between the different cementation groups.

SIGNIFICANCE

Marginal adaptation and fracture forces of all tested groups are in a range, where no restrictions should be expected for clinical application.

Authors+Show Affiliations

Department of Prosthetic Dentistry, Regensburg University Medical Center, Franz-Josef-Strauss-Allee 11, 93042 Regensburg, Germany. Electronic address: verena.preis@ukr.de.Department of Prosthetic Dentistry, Regensburg University Medical Center, Franz-Josef-Strauss-Allee 11, 93042 Regensburg, Germany.Department of Prosthetic Dentistry, Regensburg University Medical Center, Franz-Josef-Strauss-Allee 11, 93042 Regensburg, Germany.Department of Prosthetic Dentistry, Regensburg University Medical Center, Franz-Josef-Strauss-Allee 11, 93042 Regensburg, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26345998

Citation

Preis, Verena, et al. "Influence of Cementation On in Vitro Performance, Marginal Adaptation and Fracture Resistance of CAD/CAM-fabricated ZLS Molar Crowns." Dental Materials : Official Publication of the Academy of Dental Materials, vol. 31, no. 11, 2015, pp. 1363-9.
Preis V, Behr M, Hahnel S, et al. Influence of cementation on in vitro performance, marginal adaptation and fracture resistance of CAD/CAM-fabricated ZLS molar crowns. Dent Mater. 2015;31(11):1363-9.
Preis, V., Behr, M., Hahnel, S., & Rosentritt, M. (2015). Influence of cementation on in vitro performance, marginal adaptation and fracture resistance of CAD/CAM-fabricated ZLS molar crowns. Dental Materials : Official Publication of the Academy of Dental Materials, 31(11), 1363-9. https://doi.org/10.1016/j.dental.2015.08.154
Preis V, et al. Influence of Cementation On in Vitro Performance, Marginal Adaptation and Fracture Resistance of CAD/CAM-fabricated ZLS Molar Crowns. Dent Mater. 2015;31(11):1363-9. PubMed PMID: 26345998.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of cementation on in vitro performance, marginal adaptation and fracture resistance of CAD/CAM-fabricated ZLS molar crowns. AU - Preis,Verena, AU - Behr,Michael, AU - Hahnel,Sebastian, AU - Rosentritt,Martin, Y1 - 2015/09/05/ PY - 2015/06/14/received PY - 2015/08/17/accepted PY - 2015/9/9/entrez PY - 2015/9/9/pubmed PY - 2018/1/27/medline KW - Cementation KW - Ceramics KW - Crown KW - Fracture resistance KW - Marginal adaptation KW - Zirconia-reinforced lithium silicate SP - 1363 EP - 9 JF - Dental materials : official publication of the Academy of Dental Materials JO - Dent Mater VL - 31 IS - 11 N2 - OBJECTIVES: This study investigated the influence of conventional cementation, self-adhesive cementation, and adhesive bonding on the in vitro performance, fracture resistance, and marginal adaptation of zirconia-reinforced lithium silicate (ZLS) crowns. METHODS: Human molar teeth (n=40) were prepared and full-contour crowns of a ZLS ceramic (Celtra Duo, DeguDent, G, n=32) and a lithium disilicate ceramic (LDS; IPS e.max CAD, Ivoclar-Vivadent, FL, n=8) were fabricated and glazed. Four groups of ZLS crowns were defined (n=8/group) and cemented with different glass-ionomer cements, resin, and resin-modified self-adhesive luting materials. The LDS crowns served as reference group with adhesive bonding. A combined thermal cycling and mechanical loading (TCML: 3000×5°C/3000×55°C; 1.2×10(6) cycles à 50N) with human antagonists was performed in a chewing simulator. Fracture force of surviving crowns was determined. Marginal adaptation at the cement/tooth and cement/crown interface was investigated by scanning electron microscopy before and after TCML, and the share of perfect margins was determined. Data were statistically analyzed (one-way ANOVA; post hoc Bonferroni, α=0.05). RESULTS: One crown of the adhesive group failed during TCML (879,000 cycles=3.7 years). No statistically significant (p=0.078) differences in fracture resistance were found between different cementations, although highest data in tendency were found for adhesive bonding. Shares of perfect margins at the cement/tooth (93.8±5.6-99.6±0.8%) and cement/crown (84.7±6.6-100.0±0.0%) interfaces did not differ significantly (p>0.05) between the different cementation groups. SIGNIFICANCE: Marginal adaptation and fracture forces of all tested groups are in a range, where no restrictions should be expected for clinical application. SN - 1879-0097 UR - https://www.unboundmedicine.com/medline/citation/26345998/Influence_of_cementation_on_in_vitro_performance_marginal_adaptation_and_fracture_resistance_of_CAD/CAM_fabricated_ZLS_molar_crowns_ DB - PRIME DP - Unbound Medicine ER -