Spier W
Handchirurgie. 1980;12(1-2):69-70.
Animal experiments reveal that stability may be achieved in small metaphyses also by "small-fragment" screws if applied correctly. Although the bone fixation of lag screws is greater than that of positioning screws the latter still make internal fixation stable enough for early mobilization. With continuing bone healing there is decreasing screw stability though it is not lost completely. The forces exerted by the screws on bone or plate, respectively, therefore seem to provide enough stability for the osteosynthesis on the operating day as well as for the entire duration of the healing. If the screws ever come loose it is usually due to faulty operating technique.
动物实验表明，如果应用得当，“小碎片”螺钉也可在较小的干骺端实现稳定性。尽管拉力螺钉的骨固定效果优于定位螺钉，但后者仍能使内固定足够稳定以便早期活动。随着骨不断愈合，螺钉稳定性虽会降低，但不会完全丧失。因此，螺钉分别施加于骨或钢板上的力，似乎能为手术当天的骨合成以及整个愈合过程提供足够的稳定性。如果螺钉松动，通常是由于手术技术失误。
