Retentive force and dislodgment time variations between three implant overdenture stud attachments in an acidic...

Area of Science:

• Dental Implantology
• Prosthodontics
• Biomaterials Science

Background:

• Mandibular two-implant overdentures are a common treatment for edentulism.
• Stud attachment systems are crucial for overdenture retention and stability.
• Evaluating the long-term performance of these systems is essential for clinical success.

Purpose of the Study:

• To compare the retentive force and dislodgment time of three stud attachment systems.
• To assess the durability of these systems under simulated clinical conditions.
• To determine the most suitable system for mandibular two-implant overdentures.

Main Methods:

• An in-vitro study simulated 2000 insertion/removal cycles for three attachment systems (OT Equator, Locator, Locator R-Tx).
• Thermocycling and citric acid exposure were used to simulate the oral environment.
• Retentive force and dislodgment time were measured using a testing machine.

Main Results:

• All three systems demonstrated a significant decrease in retentive force and dislodgment time over 2000 cycles.
• Locator R-Tx exhibited significantly greater retentive force compared to the other systems.
• OT Equator showed the most stable retention over the tested cycles.

Conclusions:

• The evaluated stud attachment systems maintained satisfactory retentive force throughout 2000 cycles.
• Locator R-Tx offers superior initial retention for mandibular overdentures.
• OT Equator provides the most consistent retention over time, suggesting high durability.