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Fracture resistance of all-ceramic and metal-ceramic inlays.
Int J Prosthodont. 2001 Mar-Apr; 14(2):109-14.IJ

Abstract

PURPOSE

Metal-ceramic inlay designs were developed to determine if the esthetic qualities of all-ceramic inlays could be duplicated and at the same time improve their strength and stability. The objectives of this study were to: (1) compare the fracture resistance of metal-ceramic inlays with that of all-ceramic inlays; (2) determine the correlation between the degree of preparation taper and fracture resistance; and (3) determine the correlation between marginal gap width and fracture resistance.

MATERIALS AND METHODS

Inlay preparations were made on 60 Dentoform teeth, with 30 teeth allocated for metal-ceramic inlays and 30 teeth for all-ceramic inlays. Each group was further subdivided into 5-, 10-, and 20-degree taper preparations. Metal-ceramic inlays were fabricated using Goldtech Bio 2000 metal and Ceramco porcelain extending to the margin, while all-ceramic inlays were made from Empress II ceramic. Marginal gap widths were measured at six critical areas after fabrication. The load at failure was measured using an Instron Universal Testing Machine.

RESULTS

The mean fracture load for all-ceramic inlays and metal-ceramic inlays at 5, 10, and 20 degrees was 70+/-40 N, 48+/-37 N, 33+/-7 N, and 40+/-23 N, 29+/-22 N, and 14+/-4 N, respectively. The mean gap width was 105 microm and 126 microm for all-ceramic and metal-ceramic inlays, respectively.

CONCLUSION

The mean fracture load for Empress inlays was significantly higher than that for metal-ceramic inlays. Inlays with a 5-degree taper were significantly more fracture resistant than those with a 20-degree taper. There was no relation between marginal gap width and fracture resistance.

Authors+Show Affiliations

Esquivel-Upshaw JF
Department of Prosthodontics, University of Florida College of Dentistry, Gainesville 32610, USA. jesquivel@dental.ufl.edu
Anusavice KJ
No affiliation info available
Yang MC
No affiliation info available
Lee RB
No affiliation info available

MeSH

Aluminum SilicatesAnalysis of VarianceCeramicsDental Cavity PreparationDental Marginal AdaptationDental PorcelainDental Prosthesis DesignDental Restoration FailureDental Stress AnalysisGlass Ionomer CementsGold AlloysHumansInlaysMaterials TestingMetal Ceramic AlloysMolarResin CementsStress, MechanicalSurface Properties

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

11843445

Citation

Esquivel-Upshaw, J F., et al. "Fracture Resistance of All-ceramic and Metal-ceramic Inlays." The International Journal of Prosthodontics, vol. 14, no. 2, 2001, pp. 109-14.
Esquivel-Upshaw JF, Anusavice KJ, Yang MC, et al. Fracture resistance of all-ceramic and metal-ceramic inlays. Int J Prosthodont. 2001;14(2):109-14.
Esquivel-Upshaw, J. F., Anusavice, K. J., Yang, M. C., & Lee, R. B. (2001). Fracture resistance of all-ceramic and metal-ceramic inlays. The International Journal of Prosthodontics, 14(2), 109-14.
Esquivel-Upshaw JF, et al. Fracture Resistance of All-ceramic and Metal-ceramic Inlays. Int J Prosthodont. 2001 Mar-Apr;14(2):109-14. PubMed PMID: 11843445.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fracture resistance of all-ceramic and metal-ceramic inlays. AU - Esquivel-Upshaw,J F, AU - Anusavice,K J, AU - Yang,M C, AU - Lee,R B, PY - 2002/2/15/pubmed PY - 2002/3/1/medline PY - 2002/2/15/entrez SP - 109 EP - 14 JF - The International journal of prosthodontics JO - Int J Prosthodont VL - 14 IS - 2 N2 - PURPOSE: Metal-ceramic inlay designs were developed to determine if the esthetic qualities of all-ceramic inlays could be duplicated and at the same time improve their strength and stability. The objectives of this study were to: (1) compare the fracture resistance of metal-ceramic inlays with that of all-ceramic inlays; (2) determine the correlation between the degree of preparation taper and fracture resistance; and (3) determine the correlation between marginal gap width and fracture resistance. MATERIALS AND METHODS: Inlay preparations were made on 60 Dentoform teeth, with 30 teeth allocated for metal-ceramic inlays and 30 teeth for all-ceramic inlays. Each group was further subdivided into 5-, 10-, and 20-degree taper preparations. Metal-ceramic inlays were fabricated using Goldtech Bio 2000 metal and Ceramco porcelain extending to the margin, while all-ceramic inlays were made from Empress II ceramic. Marginal gap widths were measured at six critical areas after fabrication. The load at failure was measured using an Instron Universal Testing Machine. RESULTS: The mean fracture load for all-ceramic inlays and metal-ceramic inlays at 5, 10, and 20 degrees was 70+/-40 N, 48+/-37 N, 33+/-7 N, and 40+/-23 N, 29+/-22 N, and 14+/-4 N, respectively. The mean gap width was 105 microm and 126 microm for all-ceramic and metal-ceramic inlays, respectively. CONCLUSION: The mean fracture load for Empress inlays was significantly higher than that for metal-ceramic inlays. Inlays with a 5-degree taper were significantly more fracture resistant than those with a 20-degree taper. There was no relation between marginal gap width and fracture resistance. SN - 0893-2174 UR - https://www.unboundmedicine.com/medline/citation/11843445/Fracture_resistance_of_all_ceramic_and_metal_ceramic_inlays_ DB - PRIME DP - Unbound Medicine ER -