Dentistry – Orthodontics – Including extra-oral force transmitting means
Patent
1995-05-12
1997-07-29
Burr, Edgar S.
Dentistry
Orthodontics
Including extra-oral force transmitting means
A61C 706
Patent
active
056516711
ABSTRACT:
A device for applying a force to an orthodontic apparatus in such a manner as to allow a patient or his orthodontist to adjust the force and for recording the force as a function of the time the apparatus is actually worn. In the device, two similar compression springs are arrayed in parallel with one end of each spring pushing against a movable saddle disposed distal from the patient's jaw. The opposite end of each spring abuts a stop which together with the springs and saddle is housed within a case. Belts which extend around the user's head and/or neck hold the case as well as the stop housed therein in fixed position during use. After the device is placed on the patient, the extension of each spring can be adjusted by repositioning the stop. The movable saddle, on the other hand, is fastened to one end of a strap connected to the orthodontic apparatus. Pulling the strap further compresses the two springs between the saddle and the stop. The force exerted by the springs on the strap is measured by tracking the movement of the saddle. When a force above a predetermined setpoint is applied, a solid state timing unit is activated. The device also contains a solid state memory for storing the patient's force/time history between office visits. Accessible through an IR window formed in the case, data stored in the memory can be retrieved for immediate review by a portable memory readout unit.
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Jacobsen Alex
Seay William J.
Burr Edgar S.
Colilla Daniel J.
Leon Harry I.
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