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
Catalogue details

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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    Then leave it in the flask, but not neces- sarily in the vulcanizer, for several hours. Yes, for several hours, even after it has cooled. Leave it in the flask over night if you can. And don't accept this advice as a whimsical notion of an old = timer without reason. Each package cf vulcanite sent out to the dentists at its first introduction contained this advice and warning. I '11 not attempt to give you the chemical reasons, but the practical fact is that rubber, it seems, doesn't complete its crystallic or other hardening arrangement during the cooling pro- cess: and, if taken out of its imbedment too soon, it is liable to warp. Then the consequences (which may come even after worn awliile) are often attributed to 'change of the mouth. ElV- perimcnts in my oicn mouth prove this. And this is particularly true where scraping and tiling are done to the extent of bringing a ^^■eake^ grain texture to the surface. So, let your ]jlates 'season several hours, when you can. ]Make quick plates only in cases of need- ful hurry. I wish I had a Gabriel's horn to toot to tlie prosthetic dental world not to boil their cases and soften their plaster models before squeezing too-ether: and then not to use much force, anv- how. Xinetv per cent of vou need this strong- talk. DISHONESTY IN RUBBER PLATES. I know mainly three reasons for brittle rubber plates: (a) absolute Dishonesty; {b) Carelessness, which is a reckless child of Dis- honesty: and (c) Ignorance, vdiich is a legit- in^.ate offspring of Carelessness.