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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    If I hadn't filed off the hite=rim, but had gone on and set up the teeth by it, I would have had to grind ihcm off equivalently. UNEQUAL PRESSURE SOMETIMES NEEDED IN A BITE. But, now, I wouldn't have you understand me that stress should alrccu/s be the same all over tlie mouth. That is the first conclusion new thinkers are apt to jump to. But in many instances the strain on the tissues should l)e unequal at different places. For instance, we have a mouth where the gums are soft and yielding on one side, and hard and unyielding on the other side. In the absorbing adjustment which always takes place, more or less, under artificial dentures, especially lower ones, after worn, the softer side will change more than the harder; and then finally the teeth would strike together first on the harder side. In this case, the test=slip, in testing the bite, should hold the tighter on the soft side, where the most absorption is to take place. We have pairs of these test^slips of unequal thickness for sucli cases. Similarly, if we had a case where the mouth was soft at the rear and hard in front, as is often the case, then our slides should hold tight- er back tliere than on the alveolar ridge, in front; and vice versa. So, you see, the principle holds good both ways. So the simple i)ressometer not only en- ables us to get equal pressure wlien we want it, but often, as importantly, to get unequal strain when we need it. This rule, however, is not alicat/s ])ractical, as in temporary cases, where the alveolar proc-