Notes on dental porcelain : a practical treatise especially devoted to the interests of the beginner / by V. Walter Gilbert.

  • Gilbert, V. Walter
Date:
1905
Catalogue details

Licence: In copyright

Credit: Notes on dental porcelain : a practical treatise especially devoted to the interests of the beginner / by V. Walter Gilbert. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

    18/138 (page 12)
    Porcelain 1^'rom an estlietic and liygienic view-point, Crowns ])oi-('elain is the ideal material for restoring the lost crowns of the natural teeth. Were it not for the third essential ([ualification—that of strength —it might safel)' he cUiimed that porcelain could he used universally for the construction of crowns. By reason of tlieir prominent location in the mouth, the six anterior teeth and the bicuspids should be restored with i)orcelain whenever practi- cal conditions will permit. Ready-made crowns, such as the Logan and Davis, are now obtainable in such a variety of form and shade as to indicate their use either as they are purchased or as a base to be treated to meet special requirements. The translucent characteristic of porcelain indicates its use in backing artificial facings so that the rays of light may pass through the finished crown and thus do away with the yellow tint made by a gold backing and the gray tint made by a platinum liacking. The hygienic proper- ties of a crown are greatly increased b}^ the use of porcelain; there is no metallic taste, no joint to be forced open, thus forming a lodging place for organic matter; no galvanic action can take place between a porcelain-backed facing and the crown or filling of an occluding tooth. Because the essential feature of strength has been referred to as qualifying the universal application of porcelain to crown construction, it is not to be inferred that porcelain does not possess sufficient strength to permit of its use in constructing artificial crowns. Where a sufficient (juantity of porcelain can be placed back of a facing or below a band, the resultant crown will be stronger than a similar ci-own backed with a metal.