Lehtinen R, Oksala E
Int J Oral Surg. 1979 Apr;8(2):145-8. doi: 10.1016/s0300-9785(79)80010-1.
Six types of disposable injection needles were tested clinically for the intensity of pain caused, and their penetration capacity measured. The force nedded differed greatly with different needle types (120-250 mN). The design of the needle point was observed to have the greatest effect on the pentration capacity and the intensity of pain. To penetrate the tissue well, the needle point should have secondary bevels at the tip of the bevelled surface. The majority of the needles fulfilled this requirement.
对六种一次性注射针进行了临床测试，以检测其造成的疼痛强度，并测量了它们的穿刺能力。不同类型的针所需的力差异很大（120 - 250毫牛）。观察到针尖的设计对穿刺能力和疼痛强度影响最大。为了更好地穿透组织，针尖在斜面尖端应具有二级斜面。大多数针满足了这一要求。
