Sixty-four patients requiring crown lengthening on 64 teeth were included. Bone was reduced based on the minimal amount of tooth structure required for restoration. Patients were re-evaluated at 3 and 6 months.
There was significant soft tissue rebound (0.77 ± 0.58 mm) at 6 months post crown lengthening surgery. The tissue rebound was significantly correlated with periodontal biotype: Thick-flat biotype experienced more tissue rebound (0.7 mm) than thin-scalloped biotype (0.37 mm). Less tissue rebound was seen when the flap margin was further from the osseous crest after suturing.
Suturing the flap ≥ 3 mm from the osseous crest after surgery will minimize soft tissue rebound. There was more tissue rebound and less crown length gained when a thick-flap biotype was present.
For more information refer to
Evaluation of supracrestal gingival tissue after surgical crown lengthening: a 6-month clinical study.
J Periodontol. 2013 Jul;84(7):934-40