Dentinal Microcrack Formation after Root Canal Instrumentation by XP-Endo Shaper and ProTaper Universal: A Microcomputed Tomography Evaluation

Figure 5

Micro-CT cross-sectional image of the apical third of mandibular molar mesial root. (a) Preinstrumentation; (b) postinstrumentation. The MB canal instrumented with XPES (left) and ML canal instrumented with PTU (right). No microcracks could be detected in the pre- or postinstrumentation images.

(a)

(b)