Greene brothers' clinical course in dental prosthesis : in three printed lectures; new and advance-test methods in impression, articulation, occlusion, roofless dentures, refits and renewals / by Jacob W. Greene.

  • Greene, Jacob W. (Jacob Wesley), 1839-1916.
Date:
[1914], ©1914
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Licence: Public Domain Mark

Credit: Greene brothers' clinical course in dental prosthesis : in three printed lectures; new and advance-test methods in impression, articulation, occlusion, roofless dentures, refits and renewals / by Jacob W. Greene. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    hard, or tlie pressure on tlie soft tissues too strong—maybe both. The prineiple is iUustrated in the use of our pressometer. (Index P.) A short way of stating- the fact is this: The patient bit more into the flesh than into the ma- terial. In the biting, the natural teeth didn't give down at all. If the soft tissues under the bite- plate gave ant/, then the finished teeth, when set up to tlie bite, will, of course, come together just as much too soon as was the difference in the yielding. xVlso. at the natural wearing stress of a dent- ure, of course such gums yield some. Now, whatever amount they are forced to give more than this, by undue strain in taking the bite, represents the amount the teeth will have to be shortened. And since most dentists (nearly all) take such impressions, abnormally straining for such tissues, just so many have to after-grind; or else compel their patients to go through an un- necessary, long season of annoying and painful adjustment. And, of course, just the same results follow undue pressure in trying the teeth, set up on tlie base^plate, in the mouth. Just wear 'em till you get used to 'em, But it is reversely true that, in such cases of soft tissues, insufficient strain on the bite gives lack of proper up-touch of the teeth. So it sometimes ha])])ens tliat, in cases of too light pressure in tlie bite, tlie artificial teeth are cor- respondingly too short. While we can get the ])ressure almost ex- actly right, with little trouble, by the use of the pi-essometer test^slips in clear mouths, we can get it practically so without them in ])artial cases by my recent compensating discovery.