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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    the same princi])les and points will apply on any other articnlator. Take yonr model, on which you intend to ^ ulcanize your plate, and soapstone it to pre- \'ent the impression material from sticking to it. Then take an impression of it, without a tray. Work the impression down thin in the roof, and build it out full enough and down long enough to allow for trimming, both as to the fullness of lips and the show^length of the teetli. It is always easier to trim off than to add to; even by our new w^ay of tracing'on modeling compound from our blessed tracing- sticks. The projecting shoulder on the model will l)e your guide as to the thickness of the bite^ plate's rim at the top. Xext trim for the ap- proximate fullness of the outer lip lower down. But exactness here isn't really of much im- portance, since the upper teeth have to come together within certain relations to the natural lower ones below, anyhow. Then next comes the show*length of the teeth, where no guess ^work is permissible. ]Mark the lip=line, harmonizing AA'ith the laugh* line, and trim the bite=]3late down to it. Cut in front only, and for the width'Space of, say, the four incisors; and, if needs be, including cuspids. Then have patient repeat vigorous smiling until you 're sure of the proper show* length of the coming teeth. If you can't see well, you can paste a strip of white paper onto the bite*rim, down to where you have trimmed it, to show how long the teeth would show; or you could even stick some in- cisors onto the compound, if you wanted to. Next: Cool the trimmed portion in front and warm the top of all the rest of it, rearward.