Evaluation of fracture resistance of zirconia modification/polishing around implant abutments-Reference-Cited by-同舟云学术

Evaluation of fracture resistance of zirconia modification/polishing around implant abutments

Published:2021-05-04 Issue: Volume: Page:
ISSN:0160-6972
Container-title:Journal of Oral Implantology
language:en
Short-container-title:

Author:

Park Cheryl Jonghee¹,Son Jenny Jin²,Lin Richard³,Phark Jin-Ho⁴,Wilson Melissa Lee⁵,Chee Winston W.⁶,Cho George⁷

Affiliation:

1. Herman Ostrow School of Dentistry of University of Southern California Dentistry 925 W. 34th Street Rm4374 UNITED STATES Los Angeles CA 90089 12139991716 Assistant Professor of Clinical Dentistry, Carl Rieder Professor of Restorative Dentistry, Division of Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, California, USA

2. Assistant Professor of Clinical Dentistry, Division of Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, California, USA

3. Assistant Professor of Clinical Dentistry, Director of CAD/CAM Dentistry, Division of Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, California, USA

4. Associate Professor of Clinical Dentistry, Director of Biomaterials Research Laboratory, Co-Director of Advanced Program in Operative and Adhesive Dentistry, Division of Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern Califo

5. Associate Professor of Clinical Preventive Medicine, University of Southern California KECK School of Medicine, Los Angeles, California, USA.

6. Associate Professor, Ralph & Jean Bleak Professor of Restorative Dentistry, Director of Advanced Education in Prosthodontics, Director of Implant Dentistry, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, California, US

7. Associate Professor, Phillip Maurer Tennis Professor of Clinical Dentistry, Assistant Director of Advanced Prosthodontics, Director of Predoctoral Implant Dentistry, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, Califor

Abstract

Subcrestal placement of implants may have interproximal bone proximity issues that interfere with submucosal contour of the implant-supported Zirconia restorations during delivery of these restorations. Modification of the mesial distal submucosal areas may be necessary to fully seat the restoration without impingement of the interproximal bone. Our aim was to determine if modification of submucosal cervical contour of implant supported zirconia titanium base (Zi-Ti base) restorations result in a significant change in fracture strength compared to Zi-Ti base restorations without any modification near the cervical submucosal area. Implant Zi-Ti base restorations, designed in the form of a maxillary premolar was made for the Straumann implant lab analog. Zirconia samples were cemented onto the Ti-base and the test group (N=20) underwent recontouring and polishing at the junction of the Zi-Ti-base cervical areas. The control group (N=20) did not undergo any modifications. All 40 samples underwent fracture testing with an Instron machine. We assessed differences between modified and unmodified implant restorations using a two-tailed t-test for independent samples. Fracture strength values (N) ranged from 4,354.68 to 6,412.49 in the test group (N=20) and from 5,400.31 to 6,953.22 in the control group (N=20). The average fracture strength in the control group (6,154.84 ± 320.50) was higher than in the modified group (5,593.13 ± 486.51; p<.001)). Modification of submucosal contour significantly decreased the fracture strength. However, the average fracture strength exceeded the masticatory forces of humans.

Publisher

American Academy of Implant Dentistry

Subject

Oral Surgery

Link

http://meridian.allenpress.com/joi/article-pdf/doi/10.1563/aaid-joi-D-20-00144/2821107/aaid-joi-d-20-00144.pdf