Fig. 1
From: Success rate of fractured teeth receiving modified crown lengthening surgery and restorations
The schematic diagram for modified crown lengthening procedures in different scenarios. a Tooth is diagnosed with crown-root fracture with its margin 1 mm underneath the alveolar crest. b Removal of 4 mm bone tissue to create new biologic width in conventional procedures. c Approximately 1 mm bone reduction to expose fracture margin to form smoothy root surface and eliminate the fracture margin in modified procedures