. The science and practice of dental surgery. Fio. 372.—Case 5. After treatment. Extraction of the first left molars has allowed forward movement of the second molars, and the bite has closed, so that the right second molars now left upper premolars require backward movement, and the upper incisors can then be drawn back into normal occlusion with the lowar. 243 time the lower jaw should be moved forwardby inter-maxillary force, so as to bring it intonormal antero-pos-terior relation withthe upper teeth. Toeffect this, veryslight movement, ifany, of the lowerteeth would be re-quired.
. The science and practice of dental surgery. Fio. 372.—Case 5. After treatment. Extraction of the first left molars has allowed forward movement of the second molars, and the bite has closed, so that the right second molars now left upper premolars require backward movement, and the upper incisors can then be drawn back into normal occlusion with the lowar. 243 time the lower jaw should be moved forwardby inter-maxillary force, so as to bring it intonormal antero-pos-terior relation withthe upper teeth. Toeffect this, veryslight movement, ifany, of the lowerteeth would be re-quired. This treat-ment was decided on,but had to be aban-doned as the patientdeveloped scarletfever. The modeof treatment wasreconsidered, andit was thought thatthe simplest methodwould now be desir-able. This case is onethat is tjT3ical of theclass discussed onp. 127, for which ex-traction of the twoupper premolars was accordingly done inOctober, 1901, when thepatient was aged eleven. Fig. 3G7 shows the upper. A B Fio. 373.—Photograplis of patient shown in Figs. 371 and 372. A. Before treatment. B. After both the teetli occlude. Note the diminished depth of the dento-facial area after treatment. and lower teeth in occlusion,and the occlusal view of theupper teeth, before treat-ment. Fig. 368 shows thesame views six years aftertreatment. In both illus-trations the same model ofthe lower jaw is used. Itwill be noticed that the upperincisors have moved lingu-ally, through lip pressure,and the absence of anycounteracting resistance tothis, tiie result of the spacebehind the erupting is highly probable thatliad the upper molar seriesbeen to move back theincisors, the former teethwould, to some extent, in allprobability have moved for-ward, a nn)vement whichmust be avoided in all casesof this nature. Case 4. (Geo. XoRTHCROFT.) Fig. 369 sho\\s the casewhen the patient was tenyears old. The lower jaw isseen to be in jjost-normalrelation with tiie upper. Theu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
