AIM: This study compared the effect of using different primary crown materials (zirconia and cobalt-chromium) on the retention of telescopic retained removable partial dentures. MATERIALS AND METHODS: A maxillary Kennedy class I stone model was prepared and scanned. The virtual cast was adjusted to create four abutments at the positions of the canines and the first premolars. Primary crowns were designed and then milled. In Group I, seven primary crowns were milled out of zirconia, and in Group II, seven primary crowns were milled from cobalt-chromium blanks. Cobalt-chromium telescopic partial dentures were milled. The universal testing machine was utilized to apply vertically dislodging static forces. Initial retention values were recorded. Then, the chewing simulator (CS) was used to apply dynamic cyclic loading to each partial denture. And after, 50,000 cycles and 270 attempts of insertion and removal final retention values were recorded. The data were collected and statistically analyzed. RESULTS: A significant decrease in retention in both groups after simulation of 3 months of partial denture function was recorded. It was found that after simulation of 3 months of function Group I (zirconia) recorded a statistically significant higher mean value; (1.935 ± 0.268 N) than Group II; (0.583 ± 0.018 N) as indicated by student t-test (p ≤ 0.0001 < 0.05). CONCLUSION: Zirconia primary crowns attain higher retention values than cobalt-chromium with cobalt-chromium telescopic partial dentures after simulation of 3 months of function.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.