Mechanical side of anatomical articulation.

  • Clapp, George Wood, 1870-
Date:
1910
Catalogue details

Licence: Public Domain Mark

Credit: Mechanical side of anatomical articulation. 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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    CHAPTEE II THE TEIAL PLATES We have now learned what are the characteristics of articulation as exhibited by the best natural dentures, and may proceed with those steps which will reproduce such articulation in the artificial dentures. Good dentures presuppose good impressions and good models of both jaws.* Over each model a base plate of base-plate composition should be shaped and trimmed to approximately the area the ]3late is to occupy. These base plates might be made of wax or of modeling comjjosition, but the manipulation to which they are to be subjected makes it advis- able that base-plate composition be used. This can be obtained at any dental depot. It is easily shaped when warm and very stable when cold. It may be accurately adapted to the model, permits getting suc- tion under the upper trial plate and assists in making a thin and even denture over the vault. When this base plate has been adapted to the upper model and trimmed to approximate shape, it is transferred to the mouth and fitted just as a gold base would be. It should be as high all round as may be without being displaced by the downward pull of the muscles, f The retention may sometimes be greatly increased by making the rim high from the second bicuspids to the heels. The upper base plate is left in this condition while a step slightly in anticipation of our immediate requirements is taken. That step is to draw on the patient's face, by the aid of a ruler, a line from the *It is assumed that full upper and lower dentures for one mouth are being made together. t The height may be determined by trying the base plate in the mouth and then pulling the cheeks and lips downward. The sides should be trimmed until the base cannot be dislodged in this manner. There should be good clearance at the frenum and at the buccal strings.
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