Fracture mechanics analysis of vertical root fracture from condensation of gutta-percha

被引:22
作者
Chai, Herzl [1 ]
Tamse, Aviad [2 ]
机构
[1] Tel Aviv Univ, Sch Mech Engn, IL-69978 Tel Aviv, Israel
[2] Tel Aviv Univ, Goldschleger Sch Dent Med, IL-69978 Tel Aviv, Israel
关键词
Root canal; Lateral condensation; Crack; VRF; FEA; FINITE-ELEMENT-ANALYSIS; CANAL PREPARATION; STRENGTH; COMPACTION; SUSCEPTIBILITY; RESISTANCE; STRESSES; STRAIN; DENTIN; LOAD;
D O I
10.1016/j.jbiomech.2012.03.022
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
A two-dimensional fracture mechanics analysis of vertical root fracture (VRF) in single-canal roots from apical condensation of gutta-percha (gp) is developed. The resulting analytic relation for apical load causing VRF agrees with major trends reported in in-vitro tests on roots subjected to either continuous or, the more clinically relevant, repeating vertical condensation of gp. The model explicitly exposes the role of root canal morphology and dentin fracture toughness on VRF. Ovoid and irregular canals are prone to fracture while the effect of mean root canal radius is modest. Canal taper and instrumentation details may affect VRF only marginally and indirectly. The model predicts dentinal cracks to occur following root canal instrumentation and obturation, which may pose long-term threats to tooth integrity. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1673 / 1678
页数:6
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