Abstract
This study aims to evaluate the influence of additives chitosan, zirconia and hydroxyapatite on bioactivity and bond strength of calcium aluminate cement (CAC) to the retrograde cavity. A hundred bovine incisors will be selected and instrumented up to F5 Protaper Universal system and adapted to a device to perform the apicectomy and root-end preparation (1.5 mm in diameter and 2 mm deep).…