Clinical crown height changes in adult patients after non-extraction, orthodontic treatment: a retrospective cohort study.

Objective: To assess changes in clinical crown height (CCH) in adult orthodontic patients treated by fixed appliances to distalise the molars.

Design: Retrospective case series study.

Setting And Patients: A total of 30 adults with healthy periodontal tissues who received orthodontic treatment at the Department of Orthodontics, Yokohama, Japan and its related orthodontic clinic were assessed.