Micro-CT evaluation of root canal preparation with rotary instrumentation on prototyped primary incisors.

This study aimed to evaluate the endodontic instrumentation outcomes with asymmetrical files compared to reciprocating and hand files (HFs) in 3D-printed prototypes of upper primary incisors using micro-computed tomography (micro-CT). For this purpose, 50 prototypes were randomly divided (n = 10) according to the instrumentation technique as follows: HFs, a reciprocating file (WaveOne® Gold [WOG]), and three asymmetrical movement files: XP-Endo® Shaper (XPS), XP-Endo® Finisher (XPF), and XP Clean (XPC). The specimens were scanned and, after registration of the baseline and instrumented volumes, changes in the root canal volume (RCV), debris accumulation, removed root material volume (RRMV), non-instrumented areas, and the presence of cracks/perforations were quantified.

Reciprocating instrumentation in a maxillary primary central incisor: A protocol tested in a 3D printed prototype.

Background: Efficient endodontic instrumentation of primary teeth is a challenge for paediatric dentists.

Aim: To evaluate biomechanical outcomes of endodontic instrumentation with a reciprocating system in a polymer-prototyped primary maxillary central incisor.

Design: The specimen was systematically instrumented and micro-CT scanned before and after each file.