Objective: The present in vitro study aimed to investigate the impact of three different access cavity types on the identification of the additional canals in mandibular premolars. Methods and Materials: .value = 0.05). Results: < 0.001). No difference was observed between the access cavity types in identifying the second and third canals. Of the two three-canal teeth, one was found in the TAC stage and the other in the CAC stage. Conclusion: When the access cavity of mandibular premolars is prepared using magnification with a microscope and ultrasonic troughing, the design of the access cavity has no effect on identifying the additional canals in these teeth. Clinical Relevance: Mandibular premolars are reported to have more than one canal, and the effect of different access cavities has not been evaluated in canal detection of these teeth.
Javidi et al. (Thu,) studied this question.