. The Dental cosmos. call to mind briefly the potent possi-bilities of influences from this region,while we contemplate in this light cer-tain well-known and commonly acceptedfacts pertaining to bodily disorders, andapply these as directly as possible inaccounting for oral defects. The resultsreported by the late Dr. Anderson ofDetroit, who closed the nasal openings BROWN.—ITPPER MAXILLARY CONTRACTION AND EXPANSION. 139 of guinea-pigs, rabbits, and dogs withcotton by suturing the external nares,were much the same as those shown bythe puppies in which I caused partialnasal stenosis to occur in
. The Dental cosmos. call to mind briefly the potent possi-bilities of influences from this region,while we contemplate in this light cer-tain well-known and commonly acceptedfacts pertaining to bodily disorders, andapply these as directly as possible inaccounting for oral defects. The resultsreported by the late Dr. Anderson ofDetroit, who closed the nasal openings BROWN.—ITPPER MAXILLARY CONTRACTION AND EXPANSION. 139 of guinea-pigs, rabbits, and dogs withcotton by suturing the external nares,were much the same as those shown bythe puppies in which I caused partialnasal stenosis to occur in a quite nat-ural way by preventing growth acrossthe maxilla in the region of the palate,as shown by the illustrations. All these animals developed certain (3) Local disease of the respiratorytract is induced. (4) Obstruction of the nostrils leadsto dilatation of the heart. (5) Changes in the skin and theblood of the dogs occur. (6) Symptoms resembling asthma andemphysema may be induced in the loweranimals. Fig. C D E Sections of head of puppy six months old, with jaws arrested in development acrossthe palate by wiring at eight weeks old. These sections when compared withthose of a normal pup shown in Fig. 2 show plainly the contracted effect uponthe nares, the deviation of the nasal septum—especially the section shown in point at which the wire was inserted and development arrested. The en-larged maxillary sinuses are also evident in comparison. symptoms which were not unlike thosecommonly found among children whosecontracted upper dental arches and highnarrow palatal vaults are familiar to all. Andersons summary of the results ofhis experiments is as follows: (1) Xasal obstruction leads to deathor to serious impairment of vitality. (2) The lowered resistance predis-poses to infections (particularly broncho-pneumonia, sero-purulent pleurisy, andsimilar affections). (7) Emphysema of the lungs can bedemonstrated h istologica 1 ly. (8) Eeopening of the occluded nos-t
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Keywords: ., bookcentury1900, bookdecade1910, bookiddent, booksubjectdentistry
