In vivo determination of tooth mobility after fixed orthodontic appliance therapy with a novel intraoral measurement device.

Objective: Valid measurement systems recording tooth mobility upon displacement within the subtle range of physiological strains are missing. Here, we introduce a novel in vivo measurement device and demonstrate a first clinical application by monitoring tooth mobility changes during retention after fixed multibracket appliance therapy.

Materials And Methods: Tooth mobility was measured in vivo on 21 patients (11 female, 10 male; mean age 16.