Joint jaw position retainer and manufacturing method thereof

By obtaining the set of discrete points of mandibular motion and fitting the guide curve to create an articular jaw retention device for guide tracks, the problem of traditional retention devices limiting mandibular motion is solved, the stability and freedom of the mandibular within the normal motion trajectory is achieved, and the recovery of the discordant relationship is promoted.

CN120420109APending Publication Date: 2025-08-05FOURTH MILITARY MEDICAL UNIVERSITY
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Patent Information

Application Number
CN202510565460.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-30
Publication Date
2025-08-05

AI Technical Summary

Technical Problem

The existing upper and lower jaw fixing retainers limit the opening and closing movement function of the mandible, causing patients to be unable to perform normal physiological activities such as chewing, swallowing and speech. Long-term passive fixation of the mandible can easily lead to muscle fatigue in the joint area, which is not conducive to the recovery and stability of the joint area's discord relationship.

Method used

An articular jaw position retainer is designed. By obtaining the set of discrete points of mandibular motion, fitting the guide curve and segmenting it into sub-curves, making it into a guide track, forming an axially retractable guide telescopic component to ensure that the mandibular motion is within the normal open and closed jaw motion trajectory, stabilizing the disc-condyle relationship while ensuring the necessary degree of movement freedom.

Benefits of technology

The normal opening and closing jaw motion trajectory limit of mandibular movement is achieved, the stability of the disccondyle relationship is improved, and the mandible motion needs are adapted to a certain range, solving the problem of passive jaw fixation caused by traditional retention devices, and ensuring the convenience of wearing.

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Abstract

The invention relates to the technical field of oral medical instruments, in particular to a joint jaw position retainer and a manufacturing method thereof, and the method comprises the following steps: acquiring a lower jaw movement discrete point set during jaw opening and closing movement; the lower jaw movement discrete point set is fitted to generate a guide curve, the guide curve is segmented according to the tooth point rotation angle, a preset number of sub-curves are obtained, the arc length of each sub-curve is monotonically decreased in the jaw opening direction, and the tooth point rotation angle is an included angle formed by the starting point and the ending point of the guide curve with the condylar process center as the circle center; the sub-curves are correspondingly manufactured into guide rails, the guide rails are sequentially connected in series and connected in a sleeved mode according to the connection sequence of the sub-curves in the guide curves to form the guide telescopic assembly capable of stretching and retracting in the axial direction, the mandibular movement is restrained within the normal jaw opening and closing movement track range, and the necessary movement freedom degree is guaranteed while the disc-condyle relation is stabilized.
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