| 摘要 |
The reverse headgear with neck strap has: a forehead-cap adapted to engage a patient's forehead; a chin-cap adapted to engage the patient's chin; and a frame interconnecting the forehead-cap and the chin-cap. The frame has side portions extending between the forehead-cap and the chin-cap defining rearward extending loops. A neck strap is releasably connected to the loops on opposite sides of the frame by hooks, the neck strap passing behind the patient's neck in order to apply a traction force to the chin cap to draw the mandible posteriorly. An M-shaped hook is attached to the chin-cap and extends in front of a mouth of the patient, the hook being configured to receive a tension applying elastic element attachable to the patient's upper teeth in order to apply anterior traction to the maxilla, thereby correcting a class III malocclusion by tensioning the maxilla forward and the mandible rearward.
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