The use of reversible hydrocolloid in the construction of the porcelain jacket crown

Abstract

It is not to be inferred that it is impossible to obtain an accurate impression of a prepared stump with the copper-tube compound technique. A technique for making impressions for porcelain jacket crowns in hydrocolloid has been described, and it is offered as a substitute which provides assurance that accurate dies and well-fitting porcelain jacket crowns can be produced with a greater consistency than with compound. Remakes with hydrocolloid are so few that they are negligible. The one disadvantage (if one may call it so) of the suggested procedure is that some time is required for the laboratory work necessary to produce the casts and dies, but the chair-time that is saved eventually compensates for this extra laboratory time. The correct marginal adaptation and over-all accuracy of fit is far more important than the element of time.