Evaluation of Dentin Defect Formation during Retreatment with Hand and Rotary Instruments: A Micro-CT Study

<div>Two sets of contiguous micro-CT images of the same root are shown ((a) after initial instrumentation; (b) after the removal of gutta-percha). (a) Craze line formation (arrow) following gutta-percha removal; (b) a craze line developing into a fracture (arrow) following gutta-percha removal and lateral canal (arrowhead). Note the remaining filling material.</div>

Scanning

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Figure 1

Figure 1: Evaluation of Dentin Defect Formation during Retreatment with Hand and Rotary Instruments: A Micro-CT Study 