IADR Abstract Archives

COMPARISON OF RETENTIVE PROPERTIES OF FOUR ATTACHMENT SYSTEMS IN MANDIBULAR OVER- DENTURES AT VARYING ANGLES- AN IN-VITRO STUDY

Objectives: To compare initial retentive force of four implant over-denture attachment systems (Locator, OT Equator, Novaloc and CM LOC); at two different angulations; 0° and 20°to the retentive force after one year of simulated use.
Methods: For this cross sectional study, 16 blocks were fabricated, 8 blocks housing the implant analogues and 8 housing over-denture attachment systems. For the 8 blocks with implant analogues, 4 blocks had the implant analogues place at a 20-degree divergence angle and 4 blocks had the implants placed at zero-degrees. The over-denture attachments were tested in a simulated environment of one year at both zero-degree inter- implant placement (parallel) and 20-degree inter-implant placement.
Results: After the stipulated simulation period (1460 cycles) for the implant over-denture attachments on implant analogues placed at 0 degrees, the largest difference in retention was seen in CM LOC, followed by OT Equator, Locator, and Novaloc, respectively, at -25.51(1.42), -15.76 (1.20), -14.43 (2.20), and -11.62 (2.39). For the implant analogues placed at 20 degrees, the largest differences in retention were seen in CM LOC, Locator, Novaloc and OT, respectively, -26.55 (0.90), -19.82 (1.97), -14.18 (2.29) and - 12.46 (2.02).
Conclusions: All samples in this study illustrated a clear reduction in retention after simulated use. A noticeable difference in the amount of reduction between the various attachments was observed and this due to the physical properties of the attachment system and their corresponding design.

2022 African Middle Eastern Region Meeting (Riyadh, Saudi Arabia)
Riyadh, Saudi Arabia
2022

Dental Materials 5: Biocompatibility, Bioengineering and Biologic Effects of Materials
  • Haffajee, Ridhwaan  ( University of the Western Cape , Cape Town , Western Cape , South Africa )
  • Asia, Winnifred  ( University of the Western Cape , Cape Town , Western Cape , South Africa )
  • None
    Poster Session
    2022 African Middle Eastern Region Meeting-Abstracts Presented