Resistance to cyclic fatigue of pulpless teeth with flared root canals restored with different post-and-core materials.
- Author:
Shu-hai HU
1
;
Takayuki OSADA
;
Kenji WARITA
;
Tadaharu KAWAWA
Author Information
- Publication Type:Journal Article
- MeSH: Carbon; Chromium Alloys; Composite Resins; Dental Materials; Dental Pulp Cavity; pathology; Humans; Materials Testing; Post and Core Technique; Tooth, Nonvital; therapy
- From: Chinese Journal of Stomatology 2005;40(4):287-290
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the resistance to cyclic fatigue of maxillary incisors with flared canals restored with different post-and-core materials.
METHODSThirty human maxillary central incisors were assigned randomly to two main groups (non-ferrule and 1-mm ferrule) of 15. Each main group was then divided into 3 groups of 5 specimens and restored with custom cast post-and-core (MPC), resin composite post-and-core (RCP), and resin composite core combined with prefabricated carbon fiber post (FRC), respectively. Every group was subjected to a cyclic fatigue test, and recorded the numbers of load cycles that occurred tooth fracture. All data were analyzed with two-way ANOVA and the Tukey HSD test at alpha = 0.05.
RESULTSFRC revealed significantly higher fatigue strength than the other groups (P < 0.05). Preparing a dentin ferrule increased significantly fatigue resistance (P < 0.05). The favorable (retrieval) fracture pattern of the tested specimens was discovered only in RCP.
CONCLUSIONSUsing FRC may get a long fatigue life in restoring pulpless teeth with flared canals. Dentin ferrule preparation is necessary to enhance resistance of the restorations to cyclic fatigue.
