Early orthopedic treatment for class III skeletal patterns.
Early short-term use of the chin cup resulted in the following significant findings in Class III skeletal problems: 1. A decrease in the gonial, mandibular, and SNB angles. 2. An increase in posterior facial height as a result of increased ramal height. 3. A faster and more pronounced result in the younger patients. 4. Correction of the Class III malocclusion. These findings negate the idea that Class III traction simply repositions the condyle within the fossa. When tracings are superimposed, it is obvious that these changes are not that of a rigid body. It is believed that the change is due to remodeling of the mandible itself. The shape changes as a result of the extrinsic mechanical forces plus the intrinsic functional requirements of the newly determined position. The question as to what degree the new functional homeostatic relationship can overcome the genetic aberration of a more forward-growing mandible. This conflict will probably vary with each individual and may be predictable in the near future. However, should the aberrant growth manifest itself, it would simply require renewed force application.
D002648:Child; D002675:Child, Preschool; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D009968:Orthodontic Appliances, Removable; D013997:Time Factors