Self-Drilling and Self-Tapping Screws: An Ultrastructural Study
Self-Drilling and Self-Tapping Screws: An Ultrastructural Study
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DOI：
10.1097/scs.0b013e3181d023bd
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发表时间：
2010-03-01
影响因子：
0.9
通讯作者：
Machado, Rosilene Andrea
中科院分区：
文献类型：
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作者：
Goelzer, Juliana Goncalves;Avelar, Rafael Linard;Machado, Rosilene Andrea
目的：本研究的目的是比较自钻螺钉和自攻螺钉在骨接触和骨碎片产生方面的扫描电镜观察。材料与方法：选用3块新西兰兔颅骨。将自攻螺钉和自钻螺钉分别插入颅骨外表面，并进行生理盐水冲洗。所有螺钉长度均为5mm，插入螺钉直至其尖端穿过骨内侧。共使用16颗螺钉，8颗螺钉头直径1.5 mm， 8颗螺钉头直径2.0 mm。所有自攻螺钉均通过钻头孔（2.0 mm螺钉为1.6 mm， 1.5 mm螺钉为1.3 mm）插入。结果：螺钉置入后无损伤。自攻螺钉安装过程中不进行冲洗，可造成骨损伤。自钻螺钉安装过程中形成的骨碎片被认为是有益的。结论：由于自钻螺钉的置入是手动加压的，因此不需要冲洗。与自攻螺钉的钻孔不同，自钻螺钉形成的骨碎片不是产生热量的结果，而是能够与螺钉发生反应并改善其性能的生物活性骨组织的结果。所使用的动物模型被证明非常适合与人类进行比较，因为头部的骨骼结构具有相同的密度和厚度。
Objective: The aim of the current study was to compare self-drilling and self-tapping screws with regard to bone contact and the production of bone debris using scanning electron microscopy.Materials and Methods: Three New Zealand rabbit calvariae were used. Self-tapping and self-drilling screws were inserted into the outer surface of the skull with and without saline solution irrigation. All screws were 5 mm in length and were inserted until their tips projected through the endosteal side. Sixteen screws were used-8 with a head diameter of 1.5 mm and 8 with 2.0 mm. All self-tapping screws were inserted through a drill bit hole (1.6 mm for 2.0-mm screws and 1.3 mm for 1.5-mm screws).Results: There was no damage to the screws after insertion. Bone damage occurred when irrigation was not used during the installment of the self-tapping screws. Bone debris formed during the installment of the self-drilling screws, which is considered beneficial.Conclusions: Because the insertion of self-drilling screws is performed with manual pressure, irrigation is not essential. Unlike the drilling that occurs with self-tapping screw, the bone debris formed with self-drilling screws is not the result of the heat generated, but rather the result of biologically active bone tissue capable of reacting with the screw and improving its performance. The animal model used proved highly appropriate for comparisons with human beings because the bone structures of the head have the same density and thickness.