| 摘要 |
This invention is a pair of anti tipping retraction orthodontic brackets; a male bracket(12) having a bar(2) which can withstand and cannot be transformed by the forces of occlusion and retraction and a female bracket having a tube(l) which holds and supports the bar(2). This invention is a pair of anti tipping retraction orthodontic brackets; a male bracket(12) having a bar(2) which can withstand and cannot be transformed by the forces of occlusion and retraction and a female bracket having a tube(l) which holds and supports the bar(2).
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