. The Dental cosmos. DONTIC TREATMENT ACAUSE OF IMPACTION. Dentists have known that excessiveseparative or orthodontic pressures whencontinued too long produce nervousness,extreme irritability, and suffering. Suchpressures were impactive pressures. Orthodontic pressure improperly ap-plied is as great a factor in the causationof dental impaction as is excessive pres-sure. The application of force in thetreatment of dental irregularities is toooften made without due regard beinggiven to the laws and forces of develop-ment. Particularly is this true in regardto the posterior movement of molars to
. The Dental cosmos. DONTIC TREATMENT ACAUSE OF IMPACTION. Dentists have known that excessiveseparative or orthodontic pressures whencontinued too long produce nervousness,extreme irritability, and suffering. Suchpressures were impactive pressures. Orthodontic pressure improperly ap-plied is as great a factor in the causationof dental impaction as is excessive pres-sure. The application of force in thetreatment of dental irregularities is toooften made without due regard beinggiven to the laws and forces of develop-ment. Particularly is this true in regardto the posterior movement of molars toprovide a pleasing alignment of anteriorteeth. Orlhodontic treatments designed to provide for tooth-shifting and tiltingin the mouths of patients over twelveyears of age have been applied in muchyounger children, with the creation ofposterior impactions as the evil result. NORMAL ARCH DEVELOPMENT. Before showing the effects of suchtreatment it seems advisable at this pointto note what appears to be the normal Fig. Comparison of the calculated arch with oneof the best natural arches. plan of arch development; then, with theplan clearly in our mind, we shall betterunderstand the formation of impactions,so as to outline a plan for a rational pre-ventive treatment. The preventive treat-ment for dental impaction should bepractically the same as that for dentalirregularity, the two terms being oftensynonymous. A study of tooth forms reveals rounded,convexed, and concaved mesial and distalsurfaces as well as labial, lingual, buccal,and occlusal ones. These surfaces andforms indicate that the teeth were evi-dently designed to erupt or be withoutIkIcnil coiilac! with any other teeth until BARNES.—DENTAL IMPACTION AND PREVENTIVE TREATMENT. 5 they reach a vertical height equal to thatof adjacent teeth in occlusion, or untilocclusion with teeth in the opposite jawoccurs. The sharpened or pointed cuspsand the rounded surfaces indicate thatthe teeth were intended to pierce thegums and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentist, bookyear1912
