Goldman M, DeVitre R, Tenca J
J Dent Res. 1984 Dec;63(12):1392-5. doi: 10.1177/00220345840630121001.
Rods of lucite were drilled to receive a No. 5 parapost to a depth of 4 mm and 7 mm. Posts were fitted and cemented either by coating the post with cement or by placing the cement in the prepared hole with a lentulo spiral in a low-speed hand-piece and then inserting the pre-coated post. Photographs were taken to determine the distribution of the cement. The lentulo spiral distributed the cement along the entire length of the preparation, but coating alone did not distribute the cement evenly. The tensile strength with these two methods of post cementation was also compared in four groups of extracted teeth. In Groups IA and IIA, the post preparation was rinsed with 2 ml of 5.25% NaOCl and dried with paper points and blasts of air. In Group IA, the post was coated with zinc phosphate cement and seated. In Group IIA, the cement was placed into the post space with a lentulo spiral in a slowly rotating hand-piece; the post was then coated and seated. In Groups IB and IIB, the post preparation was rinsed with 1 ml of 17% Na2 EDTA followed by 1 ml of 5.25% NaOCl to remove the smeared layer at the dentin-cement interface. The posts were then cemented as in IA and IIA. Under the conditions of this experiment, the following conclusions can be drawn: Placing cement into the preparation with a lentulo spiral increased the tensile strength and the overall cement distribution.(ABSTRACT TRUNCATED AT 250 WORDS)
将有机玻璃杆钻孔以容纳5号辅助桩，深度分别为4毫米和7毫米。桩就位后用粘固剂粘固，方法一是在桩上涂粘固剂，方法二是用低速手机上的螺旋输送器将粘固剂放入预备好的洞中，然后插入预先涂好的桩。拍照以确定粘固剂的分布情况。螺旋输送器能使粘固剂沿预备体的整个长度分布，但仅靠涂覆不能使粘固剂均匀分布。还在四组拔除的牙齿中比较了这两种桩粘固方法的抗张强度。在IA组和IIA组中，用2毫升5.25%的次氯酸钠冲洗桩道预备体，并用纸尖和空气吹干。在IA组中，桩上涂磷酸锌粘固剂后就位。在IIA组中，用低速旋转手机上的螺旋输送器将粘固剂放入桩道间隙；然后给桩涂覆并就位。在IB组和IIB组中，用1毫升17%的乙二胺四乙酸二钠冲洗桩道预备体，接着用1毫升5.25%的次氯酸钠冲洗以去除牙本质-粘固剂界面的玷污层。然后按IA组和IIA组的方法粘固桩。在本实验条件下，可以得出以下结论：用螺旋输送器将粘固剂放入预备体中可提高抗张强度和粘固剂的整体分布。（摘要截断于250字）
