Open Collections

Alqarni, Mohammed

University of British Columbia

Objective: To measure retention load values for Locator Legacy, Locator R-Tx and Novaloc attachment systems after two thousand multiple pulls test, and compare the retention load values at initial cycles, in addition to cycles equivalent to six months, one year and a year and a half between the three groups. Material and methods: Three acrylic models were fabricated. Two implants were embedded into each block. Three attachment systems were tested in this study: Locator Legacy, Locator R-Tx and Novaloc attachments. Using an Electrodynamic Fatigue Test Machine (EFTM), two thousand multiple pulls test was performed at a crosshead speed of 50.8mm/min. Retention values were recorded for each of the two thousand cycles. One-way analysis of variance was carried out to compare the difference in retention load values between groups LL, R, NV at cycle numbers 1, 10, 548, 1096 and 1644. A post-hoc Tukey’s test was subsequently used to identify the difference between the groups. Results: The results revealed a statistically significant difference between the three groups at all the cycles (p<.001). Further, the post-hoc Tukey’s test analysis showed a significantly higher retention values for Locator Legacy and R-Tx at the initial cycles, while R-Tx and Novaloc are significantly higher at cycles 548 and 1096. There was no statistical significance difference between Locator Legacy and R-Tx at cycles 1 and 10; and between R-Tx and Novaloc at cycles 548 and 1096. Furthermore, the Novaloc group was significantly higher than both groups at cycle 1644. Conclusion: It can be concluded that LL and R groups showed an initial large reduction in retention values, 44.5% and 41.1%, respectively, from cycle 1 to cycle 10. NV and R groups exhibited significantly higher retention load values at cycles 548 and 1096 when compared to LL group. The NV group had the highest retention load values at the completion of the tested number of cycles in comparison to LL and R groups. The Novaloc attachments potentially may prove to provide some clinical advantages due to the prolonged duration of retention but there are potential complications that may also arise as a result.

Text

2021-10-04

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/79884

Craniofacial Science

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/