结论：应用螺旋CT及其三维成像技术，可对复杂的矸髓系统病变进行准确诊断，有效提高临床医生对复杂髓腔系统病变的诊断和治疗。
CONCLUSION: The tooth pulp diseases could be accurately diagnosed by applying helical CT and its 3D reconstrution methods, which could improve the diagnosis and treatment of complex root canal.
产品说明：该产品分为软轴髓腔扩大器和硬轴髓腔扩大器；
Instructions: the product is divided into soft shaft pulp cavity hole opener to a pulp cavity axis and hole opener to;
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