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A digital approach to dynamic jaw tracking using a target tracking system and a structured-light three-dimensional scanner.

Kwon, Joo Hyun; Im, Sungbin; Chang, Minho; Kim, Jong-Eun; Shim, June-Sung.
J Prosthodont Res; 63(1): 115-119, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29859796

PURPOSE:

This technical procedure describes a method for tracking mandibular movement using a three-dimensional (3D) optical scanner and target tracking system to digitally portray the motion of the mandible and temporomandibular joints by merging cone beam computed tomography (CBCT) data.

METHODS:

Four nonreflective targets were attached to the labial surface of the incisors in a noncolinear arrangement. Mandibular movement was tracked directly using a 3D facial scanner and target tracking software after merging facial scanning data, digital data obtained from a diagnostic cast, and CBCT scan data based on several landmarks of the anterior teeth. The moving path of the subjects' mandible was converted to CBCT-based data to confirm the actual movement of the mandible and temporomandibular joints.

CONCLUSIONS:

The digital implementation of mandibular movement using a 3D optical scanner and target tracking system is not prone to the same restrictions and limitations inherent in mechanical equipment; therefore, it is possible to reconstruct more realistic movement(s). This technique can be used in a wide variety of dental applications involving movement of the mandibular jaw, such as fabrication of dental prostheses, or for the diagnosis and treatment of temporomandibular joint disease.