In vitro comparison of marginal and internal fit of 3D printed definitive crowns and CAD CAM milled crowns
department or school: Dentistry, Faculty of
data provider: DSpace
degree campus: UBCV
creator: Shivaraman, Visalakshi
issued: 2023-04-18T19:18:51Z
issued: 2023
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: Objective: To compare the marginal fit and internal adaptation of novel additively manufactured (3D printed) ceramic filled hybrid composite definitive crowns and milled monolithic zirconia milled crowns. Materials & Methods: A single die STL file was used to create a congruent base with 6 points of reference using Ivoclar’s CAM 5 software and milled. Fourteen samples were manufactured for each group (n=14): milled zirconia (MI) and printed (PR). The e.max ZirCAD crowns were milled and sintered using a fast-sintering protocol. The VarseoSmile Crown Plus crowns were printed using a Sprintray 3D DLP printer. The crowns of both groups were ‘cemented’ using ultra-light body PVS to replicate the misfit space using a standard load. Dual scan protocol was used to digitize the misfit space and saved as STL files. Geomagic Control X 2020 was used to assess the misfit of the marginal gap (MG), Occlusal surface (OC) and axial surface (AX) of each sample in both groups. A statistical software program (IBM SPSS Statistics) was used to calculate the means and standard deviations of the internal (AX and OC) and marginal discrepancies (MG) for each group. Normality distribution was confirmed and assumption of equality of variances was tested using Levenè’s test. Since the data was not normally distributed and Levenè’s test was significant, a non-parametric Mann-Whitney Test was used to analyze the data. Results: The mean marginal gap (MG) between the two groups was not found to be statistically significant (p>0.05). The mean discrepancy in the internal adaptation at the axial surface (AX) and occlusal surface (OC) was found to be higher in the PR group compared to the MI group. This difference was statistically significant for both AX and OC measurements. Discussion and Conclusion: 3D printed VarseoSmile Crown Plus crowns have similar marginal fit when compared to milled e.max ZirCAD zirconia crowns. However, the milled e.max ZirCAD zirconia crowns showed improved internal adaptati…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/84246
note: IN VITRO COMPARISON OF MARGINAL AND INTERNAL FIT OF 3D PRINTED DEFINITIVE CROWNS AND CAD CAM MILLED CROWNS by Visalakshi Shivaraman BDS, Maharashtra University of Health Sciences, 2017 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Craniofacial Science) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) April 2023 © VISALAKSHI SHIVARAMAN, 2023 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis entitled: IN VITRO COMPARISON OF MARGINAL AND INTERNAL FIT OF 3D PRINTED DEFINITIVE CROWNS AND CAD CAM MILLED CROWNS submitted by Dr. Visalakshi Shivaraman in partial fulfillment of the requirements for the degree of Master of Science in Craniofacial Science Examining Committee: Dr. Vincent Lee, Assistant Professor of Teaching, Department of Oral Health Sciences, UBC Supervisor Dr. Nesrine Mostafa, Clinical Associate Professor, Department of Oral Health Sciences, UBC Supervisory Committee Member Dr. Ross Bryant, Assistant Professor, Department of Oral Health Sciences, UBC Supervisory Committee Member Dr. Bingshuang Zou, Associate Professor, Department of Oral Health Sciences, UBC Supervisory Committee Member iii Abstract Objective: To compare the marginal fit and internal adaptation of novel additively manufactured (3D printed) ceramic filled hybrid composite definitive crowns and milled monolithic zirconia milled crowns. Materials & Methods: A single die STL file was used to create a congruent base with 6 points of reference using Ivoclar’s CAM 5 software and milled. Fourteen samples were manufactured for each group (n=14): milled zirconia (MI) and printed (PR). The e.max ZirCAD crowns were milled and sintered using a fast-sintering protocol. The VarseoSmile Crown Plus crowns were printed using a Sprintray 3D DLP printer. The crowns of both groups were ‘cemented’ using ultra-light …
has type: Thesis/Dissertation
date issued: 2023-05
is shown at: 10.14288/1.0431097
language: eng
degree discipline: Craniofacial Science
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nd/4.0/
scholar level: Graduate
contributor: Lee, Vincent
type: Text
identifier URI: http://hdl.handle.net/2429/84246