[Experiences with the use of the double crown system. 2. The overlay prosthesis]

The results obtained by the authors permit the conclusion that cover dentures within the telescoping system cannot be considered profitable owing to loosening of the abutment teeth, irreparable injuries to the marginal periodontium and relatively considerable repair requirements. The injuries observed are so aggravating that the aesthetically pleasant designing of these prostheses, their relatively low laboratory fees and the possible saving of metal do not justify their use.