Premium
Impact resistance of crowned endodontically treated central incisors with internal composite cores
Author(s) -
Cathro P. R.,
Chandler N. P.,
Hood J. A. A.
Publication year - 1996
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1996.tb00110.x
Subject(s) - dentin , coronal plane , crown (dentistry) , dentistry , maxillary central incisor , collar , tooth fracture , fracture (geology) , materials science , orthodontics , composite number , gingival margin , medicine , composite material , anatomy , engineering , mechanical engineering
The impact fracture resistance of crowned endodontically treated teeth with composite cores but without posts, that had either no coronal dentin remaining or a 1mm dentin collar was compared to that of unrestored, caries free teeth. The teeth were struck mid‐labially to simulate a common trauma situation using a pendulum device and fracture1 resistance determined by calculation of absorbed energies. No significant difference was found between the intact teeth and the‐crowned root treated teeth with composite core and a 1mm dentin collar. Crowned loot treated teeth with a composite core but no coronal dentin had significantly reduced fracture resistance (p < 0.05). Teeth with the dentin collar mainly fractured obliquely from the bueeal crown margin to a point coincident with the simulated alveolus, representing a clinical situation which would allow retention rather than extraction of the tooth.