Dental mechanics / by Harry Rose.

  • Rose, Harry
Date:
[1896?]
Catalogue details

Licence: Public Domain Mark

Credit: Dental mechanics / by Harry Rose. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    ridge be marked on or beyond the condyles, the ridge can very easily be defined. 6.—Perfect Occlusion with Allowance for bedding. The lowers should be set up first, com- mencing with the centrals and working back- wards, keeping the backs well up so as to avoid making the upper case unnecessarily heavy. A watchful eye must be kept on the vertical centre-mark, and the plane of the tips of the teeth kept perpendicular to it. Haying set up the lower, commence the upper in the same way with centrals. Set the tips of the upper 6 fronts just down over the tips of the lowers but not touching them, and set the backs to articulate closely with the lower backs. The little interval left between the upper and lower fronts allows for the bedding of the dentures into the gums when pressure of mastication is put on the backs. It will be found, after the dentures have been worn a few weeks, that the interval between the upper and lower front tips gradually disappears and that a firm even bite all round ensues. Unless the said interval be left at the time of setting up, the bedding of the dentures leaves a gap between the upper and lower backs and puts a .'Strain on the upper fronts, causing them to get chipped or become looise in the vulcanite. For the same reason in part sets, where the patient has upper and lower natural front teeth in contact, it will be necessary to gag the artificial backs a little to allow for bedding. Otherwise, as pressure is exerted on them in the act of masticating they will sink into the gums and a space will develop between the iipper and lower backs. Then the extra pres- sure put u]3on the natural fronts will cause them to move forward and leave a gap between the plate and the front teeth. Think of the future as well as the present.