The burden of proof: a critical review of orthodontic claims made by some general practitioners.

The increased demand for orthodontic treatment in the developed countries has led to a recent proliferation of "motel courses" that are specifically designed for general practitioners. Most of the techniques presented are only those that have long been available for selection by discerning orthodontists. However, when they are applied exclusively and indiscriminately by inexperienced clinicians, this may result in either prolonged, unnecessary treatment or failure through instability. Therefore some of the claims that are made will be examined and discussed with a review of the literature.