A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . , because of its similarity in facial character to nearlyall the types of that Class, and because it gives an opportunity in teaching, to drawsharp lines of comparison and treatment. Class II.—There are probably no two malocclusions which so decidedly differin their demands of treatment, as Divisions 1 and 2 of Class II, notwithstandingthe fact that the occlusion of the teeth is the same. Division 1 is mainly character-ized dento-facially by a retruded malposition of the lower d
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . , because of its similarity in facial character to nearlyall the types of that Class, and because it gives an opportunity in teaching, to drawsharp lines of comparison and treatment. Class II.—There are probably no two malocclusions which so decidedly differin their demands of treatment, as Divisions 1 and 2 of Class II, notwithstandingthe fact that the occlusion of the teeth is the same. Division 1 is mainly character-ized dento-facially by a retruded malposition of the lower denture, and Division 2is mainly characterized by a protruded malposition of the upper. Between extremecases of these two Divisions will be found every reciprocal gradation of dento-facial malocclusion, the composite of which is a partial retrusion of the lower den-ture and a partial protrusion of the upper. The common treatment, under theAngle teaching, was unfortunately based almost solely upon the malocclusion ofthe buccal teeth which characterizes this Class, and consisted principally in a disto- FiG. mesial shifting of the dentures to a normal occlusion inevery case. During later years, there has been an efforton the part of those who persisted in following this systemto place the greatest movement on the denture whichneeded it the most. This, with the abnormal expansionof the upper arch, in upper protrusion, resulting no doubtin an improvement of the facial outlines, has led many toimagine they were practicing the true principles of ortho-dontia. Let us hope that the futility of this effort willbe seen by all orthodontists in the correction of pro- . _j nounced upper protrusions. In both of these divisions, the upper denture in a masticating closure is aboutthe width of a cusp in front Of a normal occlusion in relation to the lower, and
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
