Reliability, Learnability and Efficiency of Two Tools for Cement Crowns Retrieval in Dentistry.

Background: Tooth-supported fixed dentures are commonly used in restorative dentistry, and have definitely reached a high survival rate; nevertheless, their removal is sometimes required mainly due to caries or other failures (poor fit, poor cementation and so on). Removing a definitive partial denture is not trivial since the used cement is not always known and it may be very resistant; additionally, there are various clinical circumstances in which a conservative disassembly would be desirable.

Objective: assessing the performance of different tools for cement crowns retrieval in terms of reliability, learnability and efficiency.