Bonaccorso Antonio, Cantatore Giuseppe, Condorelli Guglielmo Guido, Schäfer Edgar, Tripi Teresa Roberta
J Endod. 2009 Jun;35(6):883-6. doi: 10.1016/j.joen.2009.03.007. Epub 2009 Apr 22.
The purpose of this study was to compare the shaping ability of ProTaper, Mtwo, BioRaCe, and BioRaCe + S-Apex instruments in simulated canals with an S-shaped curvature.
Canal transportation and aberrations were assessed by comparing the preinstrumentation and postinstrumentation images under a stereomicroscope. Analysis of variance and post hoc Student-Newman-Keuls test were used for statistical analysis.
ProTaper instruments caused more pronounced canal transportation in the apical curvature (P < .01) than all other instruments. The use of ProTaper, Mtwo, and BioRaCe instruments resulted in more canal aberrations compared with BioRaCe + S-Apex (P < .05).
NiTi systems including less tapered and more flexible instruments like S-Apex seem to be favorable when preparing S-shaped canals.
本研究的目的是比较ProTaper、Mtwo、BioRaCe和BioRaCe + S-Apex器械在模拟S形弯曲根管中的塑形能力。
通过比较在体视显微镜下器械操作前后的图像来评估根管偏移和形态改变。采用方差分析和事后检验Student-Newman-Keuls检验进行统计学分析。
与所有其他器械相比，ProTaper器械在根尖弯曲处导致更明显的根管偏移（P <.01）。与BioRaCe + S-Apex相比，使用ProTaper、Mtwo和BioRaCe器械导致更多的根管形态改变（P <.05）。
在预备S形根管时，包括S-Apex等锥度较小且更柔韧的器械在内的镍钛系统似乎更具优势。
