Abstract
1. I. Growth of jaws and face should, as a principle, be thoroughly stimulated to the maximum of their inherited possibilities before interfering with the growth urge by the extraction of healthy teeth. 2. II. Since it is impossible to foretell at just what age unusual spurts of jaw and face growth will take place and to what extent, and since growth normally continues well beyond the eighteenth year, it is only in extreme cases that extraction of bicuspids should be resorted to much before this age. The crowns of teeth are full size when erupted while the jaws and face continue to grow beyond the twentieth year. 3. III. In a comparatively small percentage of cases, which may vary considerably in racial admixture and in different strata of society, mostly dependent on the quality of dentistry done for the child, the amount of tooth material and jaw size will make it impossible to produce a stable occlusion in harmony with facial balance without removal of some teeth. The number of teeth and the class of tooth should be decided for each case individually. The smallest number of the least important teeth should be condemned to extraction. 4. IV. The removal of teeth does not correct the malocclusion. Self-correction following extraction but very seldom takes place; therefore, appliance therapy must almost invariably follow. Orthodontic treatment after extraction is in many cases more exacting than before. 5. V. We believe that there is a middle course, somewhat as practiced by Calvin S. Case over fifty years ago, which has been quietly followed by studious and careful orthodontists, that will eventually prevail as the sound, guiding principle of practice in orthodontic treatment. 6. VI. It is our belief that inestimably greater harm is resulting from ill-advised extraction of healthy teeth for correction of malocclusion that has been done in the past fifty years by following the Angle dictum of non-extraction in orthodontic treatment.
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