| 摘要 |
<p>A mandibular-repositioning diagnostic device has an extra-oral mechanism (3) in which an apertured frame (6) and an arm (7) are attached respectively to upper- and lower-jaw trays (1,2), and the arm (7) is coupled via a ratchet-toothed strap (13) to a slider-carrier (16) retained within the frame-aperture (17). Pulling the strap (13) through a latching head (18) on the carrier (16) reduces incrementally the spacing between the arm (7) and frame (6). A ratchet-toothed strap (25) extending lengthwise of the aperture (17) from the carrier (16), is pulled through a latching head (29) on the frame (6) to draw the carrier (16), and with it the arm (7) and lower-jaw tray (2), incrementally forwards relative to the upper-jaw tray (1). The carrier (16) is movable transversely of the aperture (17) to allow lateral-movement between the patient's jaws. The optimum setting of the mechanism (3) found, is fixed by adhesively attaching intercoupled links (4,5) to the frame (6) and arm (7) before they are uncoupled from the trays (1,2) and used as a jig for permanent oral-device manufacture.</p> |
