In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks

Bibliographic Details
Main Author:	AL-Meraikhi, Hadi Nasser
Language:	English
Published:	The Ohio State University / OhioLINK 2015
Subjects:	Dentistry
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1449063197

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu14490631972021-08-03T06:34:09Z In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks AL-Meraikhi, Hadi Nasser Dentistry Purpose:The aim of this study was to compare the marginal fit and 3-dimensional distortion of implant-fixed screw-retained computer-aided designed and computer-aided manufactured (CAD/CAM) zirconia and titanium complete dental prostheses (CDP) fabricated on 4 implants.Materials and Methods:A master edentulous model with 4 implants (#3, 6, 11, 14) was used in this study. Multi-unit abutments (Nobel Biocare) were digitally scanned using scan bodies and a laboratory scanner (S600 ARTI, Zirkonzahn). A CAD software (Zirkonzahn) was used to design complete-arch screw-retained implant prostheses and the file was sent to a milling machine for CAM. Titanium (n=5) and zirconia (n=5) frameworks were milled on 4 implants. All frameworks were scanned at one-screw test position (screw tightened only into implant #14) using an industrial computed tomography (CT) scanner (Nikon / X- Tek XT H 225kV MCT Micro-Focus). The direct CT scans were reconstructed to generate polygonal mesh models (STL) from the voxel data set and transported to a volume graphics analysis software (PolyWorks, Innovmetric) from which measurements were extracted. The 3D gap measurement between the circular mating surfaces of the frameworks and implant abutments were measured for implant #11 (Gap 2), implant #6 (Gap 3) and implant #3 (Gap 4). In addition, color maps were generated to show the gap size between the mating surfaces using +/- .500 mm color scale ranges. To calculate the 3D distortion of the titanium and zirconia frameworks, STL files of the direct CT scans were aligned to the CAD model using a sum of the least squares best fit algorithm. Surface comparison points were placed on the CAD model on the mid-facial aspect of all teeth. The 3D distortion of each direct scan to the CAD Model was calculated using inspection software (PolyWorks, Innovmetric). In addition, color maps of the scan to CAD comparison were constructed using +/- .500 mm color scale range.Results: Results showed that the material type (zirconia or titanium) was not significant for 3D gap measurements (p=.9038). However, 3D gap measurement values were significantly different between Gap 3 and 4 within each group (P=.0003). The mean 3D gap measurement for Gap 2 for titanium was 48.2 µm (SD 2.6). The mean 3D gap measurement for Gap 3 for titanium was 74.0 µm (SD 15.0) and 84.4 µm (SD 12) for zirconia. The mean 3D gap measurement for Gap 4 for titanium was 102 µm (SD 26.7) and 93.8 µm (SD 30) for zirconia. All 3D gap measurements showed values <135 µm. Results for the 3D distortion from the CAD model showed that both materials exhibited distortion. However, there was no significant difference in the amount of distortion from the CAD model between the materials (p =.7475).Conclusions:Within the limitations of this in vitro study, implant-fixed CAD/CAM- fabricated titanium and zirconia frameworks showed comparable marginal fit. 3D micro gap measurements of frameworks showed clinically acceptable misfit values. In addition, zirconia and titanium frameworks showed similar 3D distortion when compared to the CAD model. Absolute passive fit was not achieved. 2015 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1449063197 http://rave.ohiolink.edu/etdc/view?acc_num=osu1449063197 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Dentistry
spellingShingle	Dentistry AL-Meraikhi, Hadi Nasser In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks
author	AL-Meraikhi, Hadi Nasser
author_facet	AL-Meraikhi, Hadi Nasser
author_sort	AL-Meraikhi, Hadi Nasser
title	In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks
title_short	In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks
title_full	In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks
title_fullStr	In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks
title_full_unstemmed	In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks
title_sort	in vitro fit and distortion of cad/cam-fabricated implant-fixed titanium and zirconia complete dental prostheses frameworks
publisher	The Ohio State University / OhioLINK
publishDate	2015
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1449063197
work_keys_str_mv	AT almeraikhihadinasser invitrofitanddistortionofcadcamfabricatedimplantfixedtitaniumandzirconiacompletedentalprosthesesframeworks
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In Vitro Fit and Distortion of CAD/CAM-Fabricated Implant-Fixed Titanium and Zirconia Complete Dental Prostheses Frameworks

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