Extra oral dental retractor and bite opener |
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| 申请号 | US3638313D | 申请日 | 1970-07-14 | 公开(公告)号 | US3638313A | 公开(公告)日 | 1972-02-01 |
| 申请人 | ALBERTO J CERVERA; | 发明人 | CERVERA ALBERTO J; | ||||
| 摘要 | An extra oral dental retractor and bite opener having a U-shaped outer arch wire for coupling to a wearer''s neckband and the Ushaped inner arch wire coupled in the center portion thereof to the center portion of the U-shaped outer arch wire; a flat bite plate coupled to the center portion of one or both U-shaped arch wires and extending rearwardly therefrom for separating the upper and lower front teeth of the wearer; an elastic band coupled across the inner U-shaped arch wire for resting on the front teeth of the wearer and having a center portion pivotally attached by a wire to the front portion of the bite plate for limiting the travel of the elastic band. | ||||||
| 权利要求 | 1. An extra oral dental retractor and bite opener comprising: a U-shaped outer arch wire for coupling to a wearer''s neckband; a U-shaped inner arch wire coupled in a center portion thereof to a center portion of said outer arch wire; a flat bite plate coupled to the center portion of one of said arch wires and extending rearwardly therefrom for separating a wearer''s upper and lower front teeth; and an elastic tooth band coupled across said inner U-shaped arch wire for exerting pressure on the front teeth of a wearer. 2. The extra oral dental retractor and bite opener of claim 1 and further including: first and second hooks carried by said inner arch wire, said elastic band being stitched between said first and second hooks. 3. The extra oral dental retractor and bite opener of claim 1 wherein: said elastic band is coupled at a center portion thereof to said bite plate for limiting the travel thereof. 4. The extra oral dental retractor and bite opener of claim 1 and further including: a pivotal coupling means, said pivotal coupling means coupling a center portion of said elastic band to said bite plate. 5. The extra oral dental retractor and bite opener of claim 4 wherein: said pivotal coupling means comprises a wire looped around said elastic band at one end thereof and looped through first and second apertures in said bite plate at another end thereof. |
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