Up to 17-year controlled clinical study on post-and-cores and covering crowns

A selection of abstracts of clinically relevant papers from other journals. The abstracts on this page have been chosen and edited by Dr Trevor Watts.

Abstract

The most important restoration survival factor seemed to be the amount of remaining coronal tooth structure.

Main

Fokkinga WA, Kreulen CE et al. J Dent 2007; 35: 778–786

This study followed up 2 clinical trials of different core restorations, placed by 18 Dutch dentists from 1988 to 1991. From an initial 307 crowns (118 with cast post and core, 150 with prefabricated post and composite core, and 39 with composite core only), data were available for 68% of teeth at 15 yrs, and 28% at 17 yrs.

In survival analysis, the different types of restoration had no significant effect on longevity, with 17 yr tooth survival rates of 83-92%, and restoration survival rates of 71-80%. However, for the teeth with prefabricated posts only, restoration survival was significantly less (P = 0.03) where dentine was of minimal height (71%) compared with substantial height (84%). Respective tooth survival rates for these subgroups were 92% and 83% (P = 0.15).