Abstract
A clinical and cephalometric study was conducted to compare the treatment results achieved with the Begg light-wire appliance with those obtained with the edgewise mechanism supported by cervical anchorage. There were thirty-one patients were in the Begg group and twenty in the edgewise group. The following conclusions were reached: 1. 1. The mandibular plane angle did not increase more in the light-wire group. 2. 2. The occlusal plane angle increased an average of 5.7 degrees in the light-wire patients and 4.3 degrees in the edgewise patients. 3. 3. The maxillary incisors were retracted an average of 0.6 mm more in the Begg group. They were not elongated any more than those in the edgewise group. 4. 4. The mandibular incisors were maintained well in accordance to the A-P line in both groups. 5. 5. There were considerably more arches and adjustments in the edgewise group. 6. 6. The treatment results achieved with the Begg method were at least as good as those obtained with the edgewise appliance.
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