What are three types of tactile information during root canal instrumentation?

During root canal instrumentation, three types of tactile information include resistance, feedback from the file, and the sensation of debris removal. Resistance indicates the condition of the canal and potential blockages, while feedback from the file helps the dentist gauge the canal's curvature and depth. The sensation of debris removal signals effective cleaning and shaping of the canal space. Together, these tactile cues guide the clinician in ensuring thorough and safe treatment.