. The Dental cosmos. advantage being that they can be viewed characteristics of malocclusion as the for study from every angle. cases of decided upper protrusion. I The peculiar type of facial outlines have noticed that a large proportion of which characterizes the other half of Dr. the illustrations which are employed to Fig. Angles class II, in which no teeth should prove the principle of non-extraction in ever be extracted for correction, is shown Dr. Angles class II are chosen from in Fig. 23. .^These are marked types exactly this type of cases,of retruded lower dentures in rela- In a
. The Dental cosmos. advantage being that they can be viewed characteristics of malocclusion as the for study from every angle. cases of decided upper protrusion. I The peculiar type of facial outlines have noticed that a large proportion of which characterizes the other half of Dr. the illustrations which are employed to Fig. Angles class II, in which no teeth should prove the principle of non-extraction in ever be extracted for correction, is shown Dr. Angles class II are chosen from in Fig. 23. .^These are marked types exactly this type of cases,of retruded lower dentures in rela- In all of these faces will be seen the CASE , THE QUESTION OF EXTRACTION IN ORTHODONTIA. 155 decided retrusion of the labiomentalarea of the lower lip in relation to thechin, with the same distal malocclusion,as it is called, of the lower teeth in rela-tion to the upper, and with very slightprotrusion of the upper lip, showing thatthe lower dentures are placed much toofar back in relation to the mandible incomparison to typical relations. elusion, after it commences to act, cancarry the entire lower denture back tonearly the full width of a bicuspid inrelation to the mandible and upper den-ture without forcing the upper dentureforward materially? Every operator who has ever triedknows how well-nigh impossible it is toforce lowe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentist, bookyear1912
