Abstract
This study aims to evaluate the microshear bond strength of different surface treatment protocols on repair of aged 3D-printed resins. Forty resin discs (P Pro Crown & Bridge, Straumann) with 12 mm in diameter and 1.2 mm in thickness will be prepared using 3D printing technology. The specimens will be subjected to 5,000 thermal cycles between 5°C and 55°C to simulate six months of aging a…