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螺旋弹簧是制做矫正器的重要材料之一,由较细的不锈钢丝制成的半成品。我院口腔科采用天津医疗器械四厂生产的“麻花式金属节育环”的螺旋弹簧代替,效果甚佳。此环是用φ0.23m/m 不锈钢丝制成,经试验测定无论是拉长、收缩、力量强度,都完全符台临床要求。一个“麻花式金属节育环”,打开后长达11～12厘米,螺旋弹簧的内径刚好大于1毫米,19号、20号牙用不锈钢丝都能顺利通过,18号钢丝能通过“环式不锈钢节育环”。来源广,价格便宜。如果在国内没正式生产
Coil spring is one of the important materials used to make orthotic, made of thin stainless steel wire semi-finished products. Stomatology in our hospital using the Tianjin Medical Device Factory production of four “spiral metal IUD” spring instead, the effect is very good. This ring is made of φ0.23m / m stainless steel wire, determined by the test whether it is elongated, shrinkage, strength strength, are completely Fuk Taiwan clinical requirements. A “twisty metal IUD”, open up to 11 to 12 cm, the diameter of the coil spring is just greater than 1 mm, No. 19, No. 20 dental stainless steel wire can be passed smoothly, No. 18 wire through the “ring stainless steel IUD”. Wide source, the price is cheap. If not officially produced in China