Dental review; devoted to the advancement of dentistry. . with post-normal occlu-sion; of these only two or per cent had nasal obstruction. It isonly fair to point out that in this group only one of these was breastfed and aged five; she was unilateral post-normal on the left side andalso had c d e in lingual occlusion ; but though the breathing wasnormal, she was paralyzed for a time on the left side at three years ofage, which probably arrested development and entirely accounted forher condition. (Slide I IT.) Even if we eliminate this case, wehave six out of twenty-four or 25 per cent
Dental review; devoted to the advancement of dentistry. . with post-normal occlu-sion; of these only two or per cent had nasal obstruction. It isonly fair to point out that in this group only one of these was breastfed and aged five; she was unilateral post-normal on the left side andalso had c d e in lingual occlusion ; but though the breathing wasnormal, she was paralyzed for a time on the left side at three years ofage, which probably arrested development and entirely accounted forher condition. (Slide I IT.) Even if we eliminate this case, wehave six out of twenty-four or 25 per cent of children under the ageof five and one-half, taken haphazard from a London practice, suffer-ing from post-normal occlusion, 66 per cent of whom wire normalbreathers. From these three sets of figures from three different sources it 816 THE DENTAL REVIEW. seems fair to argue that although often accompanying and perhapsaggravating mal-occlusion, mouth breathing is not a primary cause ofthis condition, and gives point to the fact that the establishment of. Slide 3. nasal breathing by surgical interference even at an early age is onlyremoving an accompanying aggravating symptom and not removingthe cause of the deformity. Slide IV shows a case aged four years and six months from whichadenoids were removed at three months, resulting in the establishmentof nasal breathing; also in a beautifully formed arch, but the unilat-
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