The Effect of Occlusal Forces on Various Zirconia Restoration Screw Channel Angulations Cemented to a Ti Base
Abstract
Purpose: The purpose of this study is to test the load to failure on varying screw channel angulations in zircona crowns cemented to a Ti Base abutment. It will investigate the effect of forces on the crown produced from differing screw channel angulations. Four different angulations will be tested. Materials and Method: Forty implant replicas were placed in a custom titanium bar and zirconia Ti Base maxillary central incisor crowns of varying screw channel angulations were torqued to 20Ncm. The samples were placed in a universal testing machine at 135 degrees to the crosshead. A crosshead speed of 2mm/min was used to test load to failure of the varying screw channel angulation crowns. Results: The load to failure fracture values of the 0-, 10-, 15-, and 20-degree screw channel angulations were 309.38N, 407.74N, 341.05N, and 338.04N respectively. Statistical significance was found between the 10-degree group and the 0- and 15- degree groups. Conclusions: Within the limitations of this study, zirconia Ti Base crowns with 10-degree screw channel angulation have the highest fracture resistance compared to 0-, 15-, and 20-degrees
Document Details
- Document Type
- Technical Report
- Publication Date
- May 30, 2022
- Accession Number
- AD1186278
Entities
People
- Kevin M. Lassiter
Organizations
- Uniformed Services University of the Health Sciences