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Effect of traction before bone implant nail on soft and hard tissue profile in patients with skeletal Class III malocclusion

Recently, researchers from the Department of orthodontics of Shenzhen Children’s Hospital and the center for oral disease prevention and treatment of Shenzhen maternal and Child Health Hospital Affiliated to Southern Medical University jointly published a paper to study the changes of soft and hard tissue profile in patients with skeletal Class III malocclusion before bone implant traction This paper points out that traction before bone implant nail can promote maxillary growth, make the midface plump, and has no effect on the inclination of maxillary anterior teeth, so as to correct…

Recently, researchers from the Department of orthodontics of Shenzhen Children’s Hospital and the center for oral disease prevention and treatment of Shenzhen maternal and Child Health Hospital Affiliated to Southern Medical University jointly published a paper to study the changes of soft and hard tissue profile in patients with skeletal Class III malocclusion before bone implant traction This paper points out that traction before bone implant nail can promote maxillary growth, make the midface plump, and has no effect on the inclination of maxillary anterior teeth, so as to correct skeletal Class III malocclusion.

this article was published in the Journal of West China Stomatology, Vol. 30, 2012, No. 03

Methods: Eighteen patients with skeletal Class III malocclusion in growing stage were treated with bilateral maxillary zygomatic alveolar bone implant and face frame anterior traction. The average treatment time was 9 months. The force value was (3.5 plusmn; 0.1) n.
and
cephalometric measurements were performed by Legan before and after treatment; The changes of soft tissue and hard tissue before and after treatment were analyzed and compared

All patients were improved in class III malocclusion. The nasal floor tended to be plump, the chin rotated clockwise, the profile changed from concave to straight, the lower lip protrusion decreased, and the height ratio of soft tissue, nose lip angle, upper lip protrusion and chin lip groove depth had no significant changes There was no significant change in the upper anterior teeth, the lower anterior teeth lingual tilt, the maxilla grew forward, a point moved forward, SNA, anb increased; SNB decreased, mandible clockwise rotation

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