. The Dental cosmos. eady hadsome twenty-odd plates of differentkinds made by different dentists in theUnited States, the most successful ofwhich was made by Dr. Gritman of theUniversity of Pennsylvania. This wasa rubber plate extending as far back asthe soft palate, but in the region of the 102 THE DENTAL COSMOS, soft palate it was made thick and in theshape of a large collar button, extendinginto the posterior nares, and aroundwhich each division of the soft palate wassupposed to contract, and in this wayclose the opening to the posterior plates have been made by a num-ber of dif
. The Dental cosmos. eady hadsome twenty-odd plates of differentkinds made by different dentists in theUnited States, the most successful ofwhich was made by Dr. Gritman of theUniversity of Pennsylvania. This wasa rubber plate extending as far back asthe soft palate, but in the region of the 102 THE DENTAL COSMOS, soft palate it was made thick and in theshape of a large collar button, extendinginto the posterior nares, and aroundwhich each division of the soft palate wassupposed to contract, and in this wayclose the opening to the posterior plates have been made by a num-ber of different dentists and have beendescribed in the dental literature. It patient with the apparatus in his mouthin the act of swallowing, and, as is seen,the clinicians supposition that, in theact of swallowing, the soft part of thepalate goes forward and downward, isabsolutely correct (Fig. 5). With thisparticular piece, in the act of swallow-ing, when there is solid food in themouth, the bolus of the food forces the Fii. was the clinicians opinion that such aplate must have a soft piece, movableboth backward and upward to close theposterior nares, and must respond to thecontraction of the pharynx, thereforepossess a downward and forward move-ment. After the patient had this appara-tus in his mouth, the clinician had someX-ray pictures taken, to verify his sup-position. The first picture shows thepatient with the apparatus in his mouth,at rest (Fig. 4) ; the second was aninstantaneous exposure taken of the soft rubber upward into the posteriornares, closing these off, so that the fooddoes not force itself into the posteriornares. That it is also not necessarythat we close that passage entirely inthe act of talking by thefact that this patient can talk perfectlywell, even if the appliance does not abso-lutely close the posterior nares, that par-ticular portion being made so as to leavea space of about a quarter of an inchViet ween the posterior wall of the phar-ynx and
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Keywords: ., bookcentury1900, bookdecade1910, bookiddent, booksubjectdentistry
