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Marginal and internal fit evaluation of conventional metal-ceramic versus zirconia CAD/CAM crowns

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Marginal and internal fit evaluation of conventional metal-ceramic versus zirconia CAD/CAM crowns

dc.contributor.author	Paul, Nayana	es
dc.contributor.author	Raghavendra Swamy, K. N	es
dc.contributor.author	Dhakshaini, M. R	es
dc.contributor.author	Sowmya, Sanjukta	es
dc.contributor.author	Ravi, M. B	es
dc.date.accessioned	2020-10-21T09:18:29Z
dc.date.available	2020-10-21T09:18:29Z
dc.date.issued	2020	es
dc.identifier.uri	https://hdl.handle.net/10550/75980
dc.description.abstract	The purpose of this in vivo study was to compare the marginal and internal gap widths of monolithic zirconia crowns fabricated by CAD/CAM technique and metal-ceramic crowns fabricated by conventional technique. 10 participants needing a single restoration were selected. Zirconia crowns using CAD/CAM technology (Group A) (n=10) and metal-ceramic crowns (Group B) (n=10) using lost wax casting technique were fabricated for each selected tooth. The marginal and internal gaps of crowns were recorded using a replica technique with light body silicone material stabilized with a regular set putty. Each replica was sectioned buccolingually and mesiodistally and then evaluated at five pre-determined sites. The points measured were PM for marginal gap, PA for axial gap, PAO for axio-occlusal transition gap and PO and PCO for occlusal gaps using a stereomicroscope at 30× magni?cation. The Paired Sample (t) test was used to detect significant differences between the two groups in terms of marginal and internal fit (?= 0.05). The mean for the marginal gap was 77.42?m (±39.5?m) for Group A compared with 95.86?m (±55.12?m) for Group B. Mean values for internal gap was 87.24 (±21.7 µm) for Group A and 132.91 µm (± 50.63 µm) for Group B. Significant differences were observed between both the groups for marginal (p=.010) and internal (p=.000) fit. The CAD/CAM fabricated zirconia crowns demonstrated a better accuracy of fit when compared to metal-ceramic crowns fabricated by conventional technology.	es
dc.source	Paul, Nayana ; Raghavendra Swamy, K. N ; Dhakshaini, M. R ; Sowmya, Sanjukta ; Ravi, M. B. Marginal and internal fit evaluation of conventional metal-ceramic versus zirconia CAD/CAM crowns. En: Journal of Clinical and Experimental Dentistry, 12 1 2020: 31-37	es
dc.title	Marginal and internal fit evaluation of conventional metal-ceramic versus zirconia CAD/CAM crowns	es
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::CIENCIAS MÉDICAS	es
dc.identifier.doi	10.4317/jced.55946	es
dc.type.hasVersion	VoR	es_ES