A @entity505 fibre post system, three non- @entity11720 and one @entity11720 metal post systems, two ceramic post systems, and a metal post system with a ceramic core were studied in vitro. The control group consisted of root-filled test teeth without posts. The test teeth were identical artificial roots of an upper central incisor made from a posterior composite whose module of elasticity was similar to that of natural dentine. All posts were cemented in the roots using Panavia 21 TC. Subsequently, standardized full crowns were cemented onto all roots. On a universal testing machine, the test teeth were loaded palatally at monotonously increasing loads until root @entity174 . The highest mean @entity174 loads were found for the @entity505 fibre post system (312.5 +/- 58.8 N). The @entity174 load of non- @entity11720 metal posts (242.3-300.4 N) did not differ significantly from that of the Perma-dor post (265.9 N), which does contain @entity11720 . Values of 300.3 +/- 89.3 N ( @entity44913 ceramics) and 193.5 +/-57.0 N (zirconia ceramics) were found for the ceramic posts. The control group exhibited a @entity174 load of 228.8 +/- 35.7 N. The mean distance between the vestibular end of the @entity174 gap and the point of force application was between 10.1 +/- 2.3 and 14.7 +/- 1.2 mm.

Fracture characteristics of @entity505 fibre, ceramic and non- XXXX endodontic post systems at monotonously increasing loads.

@entity505 :: ('MESH:D002244', 'Chemical') :: ['carbon'] @entity44913 :: ('CHEBI:30187', 'Chemical') :: ['aluminium oxide'] @entity174 :: ('MESH:D050723', 'Disease') :: ['fracture'] @entity11720 :: ('MESH:D010165', 'Chemical') :: ['palladium']
@entity11720 :: (MESH:D010165,Chemical) :: ['palladium']
