Lateral loading the rigidity of triangular needle was smallest its rem-nant deformation was medium .

外侧加力， 三棱 针刚度最小，残余变形居中。

Eighty Seven Cases of Epidemic Mumps Treated with Triangular Needle

三棱 针点刺治疗流行性腮腺炎87例

Under Lateral downward loading ( 40mm ) the remnant deformation of triangular needle was smallest .

外侧下压（40mm）， 三棱 针残余变形最小。

Torsive tests : ① The rigidity and the remnant angle of the triangular needle were medi-um when it was rotated externally and internally .

扭转检测① 三棱 针外旋、内旋刚度及残余角居中。

Methods : Manual reduction and triangular external fixation devices were applied in the treatment group ( 25 gases ) . In the control group 24 Patients were treated needle prying and plaster fixation .

方法：治疗组25例患者，采用手法复位 三角形外固定器治疗，对照组24例患者，予 撬拨复位石膏外固定。