A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . s to the Eustachian tubesshould be seen. These should never be covered, or encroached upon by the bordersof the veil. Below these openings the walls are frequently thrown into perpendicularfolds, which if prominent, as they occasionally are, and the desired zone duringcontraction of the muscles is not smooth, it may be necessary to slightly raise orlower the angle of the veil at that point to a smoother zone, or to more it to the irregularities to assure the probabil
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . s to the Eustachian tubesshould be seen. These should never be covered, or encroached upon by the bordersof the veil. Below these openings the walls are frequently thrown into perpendicularfolds, which if prominent, as they occasionally are, and the desired zone duringcontraction of the muscles is not smooth, it may be necessary to slightly raise orlower the angle of the veil at that point to a smoother zone, or to more it to the irregularities to assure the probability of a complete closure of the oro-nasal passage. CHAPTER IV. THE TRIAL-MODEL OF THE OBTURATOR 453 However, there can be no cut and dried rules in regard to the exact positionof the veil in relation to the superior pharyngeal muscle, except that it should restin such a position in the relaxed state of the muscles, that the palatal musclesin swallowing, will raise it above the greatest contractility of all the pharyngealmuscles, so that they cannot get it within their grasp to cause its downward move- FlG. ment. In one instance it was necessary to place the posterior border three-eighthsof an inch above the superior pharyngeal to obtain the most practical use of theobturator. A roll of modeling-compound a trifle larger than one-half the diameter of apencil, and of sufficient length to more than reach around the loop, is now warmedat one end over a small jet of a Bunsen Burner, with sufficient heat to enable itsfirm cohesion to the trial-model at the point n, Figs. 23 and 25, where the loopemerges from the tube. Then with slight warmings, carry it around the loop im-bedding it in its substance to the other end; finally, cut off the surplus and attachthe end as before. This is shaped by the fingers, so as to leave the outer borderrounded and the inner (o) pinched to a V-edge to evenly join the line of the finalthin central portion of the veil. A proper degree of judgment ba
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
