FIG. 2.

(A) The blue lines indicate the removal of enamel and part of the dentin on the lingual surface of the tooth based on measurements using micro-computed tomography-three dimensional (micro-CT 3D) images. (B) Entry point for the access cavity (orange arrow) where the SS-OCT assessments were performed. The thickness of residual dentin (white double arrow) was determined on micro-CT 3D images. (C) Cross-sectional contour of the intact pulp chamber on the OCT 3D image (blue arrow). (D and E) Cross-sectional appearance of the developing laser burst crater visualized with OCT 3D images (blue arrow). (F) Cross-sectional appearance of pulp exposure on the OCT 3D image (blue arrow). (G) Pulp exposure confirmed under the microscope (blue arrow). (H) Pulp exposure (orange arrow) was confirmed on the micro-CT 3D image.