. The principles and practice of dental surgery. n artificial sub-stitute, such as is representedin Fig. 245, that will sub-serve the purposes of correct-/ .^^^»\> ^^^iw enunciation, as well as the natural organs, and uponwhich mastication may beconveniently performed. TheWB: »»-* teeth should be attached to a thick, strong plate, and secured to the first molars by broadclasps. They must, of course, be accurately antagonized; forupon this will their utility, in a great measure, depend. Theplate, too, should extend on the inner side of the arch back ofthe teeth to which it is clasped, and wh
. The principles and practice of dental surgery. n artificial sub-stitute, such as is representedin Fig. 245, that will sub-serve the purposes of correct-/ .^^^»\> ^^^iw enunciation, as well as the natural organs, and uponwhich mastication may beconveniently performed. TheWB: »»-* teeth should be attached to a thick, strong plate, and secured to the first molars by broadclasps. They must, of course, be accurately antagonized; forupon this will their utility, in a great measure, depend. Theplate, too, should extend on the inner side of the arch back ofthe teeth to which it is clasped, and when the second anr! thirdmolars are wanting, it may cover the entire alveolar ridge backof the first molars. A plate of this size and shape is retained, not alone by theclasps, but also (provided it is well fitted to the gum) by atmos-pheric pressure. In fact, such a plate might even be worn with-out clasps, after it has once become perfectly adapted to themouth; as we see often occurring in consequence of the loss bydecay of the WHERE ONLY ONE MOLAR REMAINS. The dentist is sometimes called on to replace the loss of upperteeth, when there is only a single molar remaining. It would,unquestionably, be better, in cases of this sort, to remove theremaining tooth and apply a whole upper set on the atmospheric-pressure principle, but this he is not always permitted to , two or four teeth remaining at the back part of the mouthdo not necessarily prevent the use of an atmospheric plate,or require clasps. But a first molar, with no teeth behind LATERAL INCISORS AND LEFT BICUSPIDS WITH CLASPS. 715 it, should be extracted, especially if, as is usually the case, there is any considerable absorption of its socket. A clasp on a second (as in Fig. 246) or third molar can be of little service, except to arive ? . Fig 246. lateral stability to the adhesion to the gum mustbe secured by accurate adapta-tion. This may be obtained,even where the plate is
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