Three-dimensional analysis of cutting behavior of nickel-titanium rotary instruments by microcomputed tomography
Three-dimensional analysis of cutting behavior of nickel-titanium rotary instruments by microcomputed tomography
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DOI：
10.1016/j.joen.2008.02.025
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发表时间：
2008-05-01
影响因子：
4.2
通讯作者：
Haapasalo, Markus
中科院分区：
文献类型：
--
作者：
Shen, Ya;Haapasalo, Markus
在牛骨模型中评估了有或没有冲洗的镍钛旋转器械的切割行为。六个品牌的镍钛旋转仪器被限制在一个弯曲的沟槽中。仪器尖端弯曲，与沟槽底部形成 1 毫米长的初始接触。在每个旋转仪器上进行一系列 100、200、300、400 和 500（总共 1,500 次）推拉行程后，通过微型计算机断层扫描对凹槽进行扫描。测量去除材料的体积和切割槽的最大深度。灌溉显着提高了除 Liberator (Li) 之外的仪器的切割效率。提取体积和最大深度之间存在显着相关性。 K3 和 Li（干）以及 K3 和 FlexMaster (FM)（灌溉组）的体积去除率最高。 FM 和 的最大切削深度最高。干旱组和灌溉组中的 K3。镍钛旋转器械的切削行为取决于实验设置、器械设计和切削条件。
The cutting behavior of nickel-titanium rotary instruments with and without irrigation was evaluated in a bovine bone model. Six brands of NiTi rotary instruments were constrained into a curved trench. The tips of the instruments were bent to create a 1-mm long initial contact with the floor of the trench. After a series of 100, 200, 300, 400, and 500 (1,500 total) push-pull strokes on each rotating instrument, the grooves were scanned by microcomputed tomography. The volume of removed material and the maximum depth of the cut groove were measured. Irrigation increased the cutting efficiency of the instruments significantly, except for Liberator (Li). There was a significant correlation between the extracted volume and the maximum depth. The volume removal rate was highest with K3 and Li (dry) and with K3 and FlexMaster (FM) (irrigation group). The maximum cutting depth was highest with FM and. K3 in both dry and irrigation groups. The cutting behavior of NiTi rotary instruments depends both on experimental setup, instrument design, and cutting condition.