. The Dental cosmos. a girl eight years old. A, Showing appliance inplace but before pressure has been applied—taken June 29, 1913. b, Thesame mouth July 29, 1913. This result might have been secured muchearlier except for delays which occurred by the patients being out of the city. Fig. 21. Fig. 22. nn Skiagram of the mouth of a boy twelve yearsold who was a chronic sufferer from hay-fever, headaches, bronchitis, and generalnervous conditions, particularly noticeablein winking of the eyelids. Marked improve-ment in all these symptoms followed widen-ing of his upper dental arch in July
. The Dental cosmos. a girl eight years old. A, Showing appliance inplace but before pressure has been applied—taken June 29, 1913. b, Thesame mouth July 29, 1913. This result might have been secured muchearlier except for delays which occurred by the patients being out of the city. Fig. 21. Fig. 22. nn Skiagram of the mouth of a boy twelve yearsold who was a chronic sufferer from hay-fever, headaches, bronchitis, and generalnervous conditions, particularly noticeablein winking of the eyelids. Marked improve-ment in all these symptoms followed widen-ing of his upper dental arch in July skiagram of his palate was taken Janu-ary 11, 1913. The thick black line along theline of the median palatine suture seemsto indicate new bone formation in thatregion. During these six months hisgrowth in height was increased two andthree-quarter inches. (6) The patients themselves almostinvariably recognize the difference innasal breathing, and this improvementoccurs when other evidences indicate[vol. lvi.—11]. Skiagram of the palate of a young mantwenty-eight years old for whom wide sepa-ration of the median palatine suture wasperformed, with great benefit to nasal andgeneral pathologic conditions; taken twoyears afterward. The thick dark lineshown where new bone had formed in theline of the formerly separated median pala-tine suture, proves that the osteogeneticlayer of the palatal periosteum does be-come active under these conditions andthat new bone formation results. at each inhalation. The degree of thechange is naturally governed by thecondition of the nasal mucous mem-brane, which may be rapid or slow orvariable in its response. (7) Patients also commonly report 154 THE DEXTAL COSMOS. feeling the effect of pressure high up inthe nasal and maxillary regions whenthe nut is turned tightly after the max-illae have been separated. (8) Ehinologists examinations al-most invariably disclose that there hasbeen an immediate enlargement of thebreathing-space. Practically al
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