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An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles.
J Prosthodont. 2008 Dec; 17(8):621-6.JP

Abstract

PURPOSE

The purpose of this study was to assess in vitro the marginal fit of four-unit fixed partial dentures (FPDs) produced using three different computer aided design/computer aided manufacturing (CAD/CAM) all-ceramic systems before and after porcelain firing cycles and after glaze cycles.

MATERIALS AND METHODS

An acrylic resin model of a maxillary arch was fabricated. Teeth #6 and 9 were prepared; teeth #7 and 8 were absent. Forty-five four-unit zirconium-oxide-based ceramic FPDs were made following conventional impression and master cast techniques: 15 were made with the Everest system, 15 with the Procera system, and 15 with the Lava system. Marginal gaps along vertical planes were measured for each bridge before (Time 0) and after (Time 1) porcelain firing cycles and after glaze cycles (Time 2) using a total of 8 landmarks (4 for tooth #6 and 4 for tooth #9) by means of a microscope at a magnification of x50. MANOVA was performed to determine whether the 8 landmarks, jointly considered, differed between CAD/CAM systems and time phases. Two-way ANOVA was performed to investigate in detail, for each landmark, how gap measurements were related to CAD/CAM systems and time phases. Differences were considered to be significant at p < 0.05.

RESULTS

The mean values of the Everest system (microm) were: 63.37 (Time 0), 65.34 (Time 1), and 65.49 (Time 2); the mean values of the Lava system (microm) were: 46.30 (Time 0), 46.79 (Time 1), and 47.28 (Time 2); the mean values of the Procera system (microm) were: 61.08 (Time 0), 62.46 (Time 1), and 63.46 (Time 2). MANOVA revealed quantitative differences of the 8 landmarks, jointly considered, between the three CAD/CAM systems (p < 0.0001), but it did not reveal any quantitative differences among the three time phases (p > 0.4). Two-way ANOVA revealed that the Lava system produced gap measurements statistically smaller than the Everest and Procera systems (p < 0.0001 for each landmark).

CONCLUSIONS

Within the limitations of this study, it was concluded that the three zirconium-oxide-based ceramic CAD/CAM systems demonstrated a comparable and acceptable marginal fit; however, the Lava system produced gap measurements statistically smaller than the Everest and Procera systems. The porcelain firing cycles and the glaze cycles did not affect the marginal fit of the zirconium-oxide-based ceramic CAD/CAM systems.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Vigolo P
Department of Clinical Odontostomatology, Institute of Clinical Dentistry, University of Padova, Padua, Italy. paolovigolo@virgilio.it
Fonzi F
No affiliation info available

MeSH

Computer-Aided DesignCuspidDental AbutmentsDental Casting TechniqueDental Impression MaterialsDental Impression TechniqueDental PorcelainDenture DesignDenture, Partial, FixedHot TemperatureHumansIncisorMaterials TestingMetal Ceramic AlloysSilicatesSurface PropertiesTitaniumTooth Preparation, ProsthodonticZirconium

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18798783

Citation

Vigolo, Paolo, and Fulvio Fonzi. "An in Vitro Evaluation of Fit of Zirconium-oxide-based Ceramic Four-unit Fixed Partial Dentures, Generated With Three Different CAD/CAM Systems, Before and After Porcelain Firing Cycles and After Glaze Cycles." Journal of Prosthodontics : Official Journal of the American College of Prosthodontists, vol. 17, no. 8, 2008, pp. 621-6.
Vigolo P, Fonzi F. An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles. J Prosthodont. 2008;17(8):621-6.
Vigolo, P., & Fonzi, F. (2008). An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles. Journal of Prosthodontics : Official Journal of the American College of Prosthodontists, 17(8), 621-6. https://doi.org/10.1111/j.1532-849X.2008.00366.x
Vigolo P, Fonzi F. An in Vitro Evaluation of Fit of Zirconium-oxide-based Ceramic Four-unit Fixed Partial Dentures, Generated With Three Different CAD/CAM Systems, Before and After Porcelain Firing Cycles and After Glaze Cycles. J Prosthodont. 2008;17(8):621-6. PubMed PMID: 18798783.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles. AU - Vigolo,Paolo, AU - Fonzi,Fulvio, Y1 - 2008/09/16/ PY - 2008/9/19/pubmed PY - 2009/4/11/medline PY - 2008/9/19/entrez SP - 621 EP - 6 JF - Journal of prosthodontics : official journal of the American College of Prosthodontists JO - J Prosthodont VL - 17 IS - 8 N2 - PURPOSE: The purpose of this study was to assess in vitro the marginal fit of four-unit fixed partial dentures (FPDs) produced using three different computer aided design/computer aided manufacturing (CAD/CAM) all-ceramic systems before and after porcelain firing cycles and after glaze cycles. MATERIALS AND METHODS: An acrylic resin model of a maxillary arch was fabricated. Teeth #6 and 9 were prepared; teeth #7 and 8 were absent. Forty-five four-unit zirconium-oxide-based ceramic FPDs were made following conventional impression and master cast techniques: 15 were made with the Everest system, 15 with the Procera system, and 15 with the Lava system. Marginal gaps along vertical planes were measured for each bridge before (Time 0) and after (Time 1) porcelain firing cycles and after glaze cycles (Time 2) using a total of 8 landmarks (4 for tooth #6 and 4 for tooth #9) by means of a microscope at a magnification of x50. MANOVA was performed to determine whether the 8 landmarks, jointly considered, differed between CAD/CAM systems and time phases. Two-way ANOVA was performed to investigate in detail, for each landmark, how gap measurements were related to CAD/CAM systems and time phases. Differences were considered to be significant at p < 0.05. RESULTS: The mean values of the Everest system (microm) were: 63.37 (Time 0), 65.34 (Time 1), and 65.49 (Time 2); the mean values of the Lava system (microm) were: 46.30 (Time 0), 46.79 (Time 1), and 47.28 (Time 2); the mean values of the Procera system (microm) were: 61.08 (Time 0), 62.46 (Time 1), and 63.46 (Time 2). MANOVA revealed quantitative differences of the 8 landmarks, jointly considered, between the three CAD/CAM systems (p < 0.0001), but it did not reveal any quantitative differences among the three time phases (p > 0.4). Two-way ANOVA revealed that the Lava system produced gap measurements statistically smaller than the Everest and Procera systems (p < 0.0001 for each landmark). CONCLUSIONS: Within the limitations of this study, it was concluded that the three zirconium-oxide-based ceramic CAD/CAM systems demonstrated a comparable and acceptable marginal fit; however, the Lava system produced gap measurements statistically smaller than the Everest and Procera systems. The porcelain firing cycles and the glaze cycles did not affect the marginal fit of the zirconium-oxide-based ceramic CAD/CAM systems. SN - 1532-849X UR - https://www.unboundmedicine.com/medline/citation/18798783/An_in_vitro_evaluation_of_fit_of_zirconium_oxide_based_ceramic_four_unit_fixed_partial_dentures_generated_with_three_different_CAD/CAM_systems_before_and_after_porcelain_firing_cycles_and_after_glaze_cycles_ L2 - https://doi.org/10.1111/j.1532-849X.2008.00366.x DB - PRIME DP - Unbound Medicine ER -