[Effect of Fränkel function regulator on the condylar and mandibular positions of patients with class II malocclusion]
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Yan-Min Wang1, Li Zhou, Xin-Zhu Yi
1Dept. of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
Objective:
To determine the positional changes of condyle and mandible in children treated successfully with Fränkel function regulator.
Methods:
30 Angle's class II patients including 15 boys and 15 girls treated with Fränkel function regulator were selected. Superimposition of the pretreatment and posttreatment lateral cephalograms of all the patients was done on the stable bone structure of the anterior cranial base and mandible. Cartesian coordinate system was used to measure the positional changes of condyle and mandible over time by computer.
Results:
There was significant inferior displacement of condyle, gonion and pogonion after treatment with reference to stable bone structure of anterior cranial base. Anterior displacement of pogonion in boys was also significant. There was significantly superior and posterior displacement of condyle and posterior displacement of gonion after treatment with reference to stable bone structure of mandible.
Conclusion:
Fränkel function regulator can stimulate condylar growth and do favor to mandibular remolding.
