Share Page:

Volume 33 , Issue 5
September/October 2018

Pages 1027–1032

Evaluation of Vertical Misfit of CAD/CAM Implant-Supported Titanium and Zirconia Frameworks

Diego da Cunha Fontoura, MSc/Vinicius de Magalhães Barros, PhD/Claúdia Silami de Magalhães, PhD/Ricardo Rodrigues Vaz, PhD/Allyson Nogueira Moreira, PhD

PMID: 30231088
DOI: 10.11607/jomi.6320

Purpose: This study compared the vertical misfit of fixed implant-supported titanium (Ti6Al4V) and yttria-stabilized tetragonal zirconia frameworks milled using the computer-aided design/computer-aided manufacturing (CAD/CAM) Zirkonzahn system. Materials and Methods: An aluminum mandibular master cast was used, and four analogs of the Regular CrossFit implant for straight multibase titanium alloy abutments (Institut Straumann) were fixed with self-curing acrylic resin in mandibular canine and second premolar tooth locations with the aid of a parallelometer. Scan abutments were placed over the four straight multibase Regular CrossFit abutments to determine their correct three-dimensional (3D) positioning in the virtual model. Implant frameworks were designed virtually, and five frameworks of each material (titanium alloy or yttria-stabilized tetragonal zirconia) were milled using the CAD/CAM system. Scanning electron microscope (SEM) images, with magnifications of 50×, 250×, and 1,000×, were obtained from three points on the buccal surface, three points on the lingual surface, and three points on the mesial surface of each abutment. The measurements were performed in the center of each of the thirds, thus defining points one, two, and three. The degree of vertical misfit at the framework-abutment interface was determined using ImageJ software and analyzed using the Student t test (P = .05). Results: The mean misalignment value was 6.011 ± 0.750 μm for the titanium group and 9.055 ± 3.692 μm for the zirconia group. Conclusion: Within the limitations of this study, there was no significant difference in vertical misfit between the titanium and zirconia implant frameworks produced using the CAD/CAM system. Regardless of the material used, the CAD/CAM frameworks achieved an adequate vertical fit.

Full Text PDF File | Order Article


Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.


© 2019 Quintessence Publishing Co, Inc JOMI Home
Current Issue
Ahead of Print
Author Guidelines
Submission Form
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us