Influence of instrument taper on the resistance to fracture of endodontically treated roots

被引：81
|
作者：
Zandbiglari, T [1 ]
Davids, H [1 ]
Schäfer, E [1 ]
机构：
[1] Univ Munster, Dept Operat Dent, D-48149 Munster, Germany
来源：
ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTOLOGY | 2006年 / 101卷 / 01期
关键词：
D O I：
10.1016/j.tripleo.2005.01.019
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
The aim was to compare the force required to fracture uninstrumented and instrumented canines and to investigate the root-reinforcing capability of AH Plus sealer. Study design. In groups 1-3 (n = 24) canals were instrumented with either GT files, FlexMaster, or stainless steel hand instruments. Twelve teeth from each group were obturated with lateral compaction using gutta-percha and AH Plus. Group 4 (n = 12) acted as uninstrumented controls. The force required to fracture the roots was measured. ANOVA, Scheffe, and t test were used for statistical analysis. Results. The intact roots were significantly stronger than all groups with instrumented and unobturated roots (P < .05). Roots enlarged with GT files were significantly weaker (P < .05) than those instrumented with FlexMaster or hand instruments. Between the obturated and unobturated roots there were no significant differences (P > .05). Conclusions. The roots were significantly weakened by the preparation with greater taper instruments. An obturation with AH Plus did not increase the fracture resistance.
引用
收藏
页码：126 / 131
页数：6
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