Internatioml Endodontic journal (1992) 2 5,121-129
Failure characteristics of endodonticaUy treated premoiars restored with a post and direct restorative material M.-C. D. N. J. M. HUYSMANS, M. C. R. B. PETERS, A. J. M. PLASSCHAERT &P.G.T. VAN DER VARST TRJKON Institute for Dental Clinical Research, Dental School, University ofNijtnegen, Nijmegen, The Netherlands
Summary Ninety-one extracted maxillary premolar teeth were restored with a prefabricated post and amalgam, composite resin or glass-cermet core. Eacb group was again divided into three groups of 9-13 teetb to be subjected to an increasing load in one of tbree standardized directions (10, 45 and 90° to tbe long axis of tbe tootb). Failure load and cbaracteristics of failure were recorded. Tbe glass-cermet-restored teetb bad a lower strengtb tban tbe otber groups for every load direction (Student's t-test: P < 0.01). Amalgam and composite resin groups sbowed a significant difference only for tbe 10° loading condition (Student's (-test: P
Failure characteristics of endodonticaUy treated premoiars restored with a post and direct restorative material M.-C. D. N. J. M. HUYSMANS, M. C. R. B. PETERS, A. J. M. PLASSCHAERT &P.G.T. VAN DER VARST TRJKON Institute for Dental Clinical Research, Dental School, University ofNijtnegen, Nijmegen, The Netherlands
Summary Ninety-one extracted maxillary premolar teeth were restored with a prefabricated post and amalgam, composite resin or glass-cermet core. Eacb group was again divided into three groups of 9-13 teetb to be subjected to an increasing load in one of tbree standardized directions (10, 45 and 90° to tbe long axis of tbe tootb). Failure load and cbaracteristics of failure were recorded. Tbe glass-cermet-restored teetb bad a lower strengtb tban tbe otber groups for every load direction (Student's t-test: P < 0.01). Amalgam and composite resin groups sbowed a significant difference only for tbe 10° loading condition (Student's (-test: P
