[Load stability in relation to the osteosynthesis method, course and complications in open lower-leg fractures with severe soft tissue lesions ].

The external fixator ("fixateur externe") is today's method of choice in the treatment of lower leg fractures with severe damage to the soft parts. The various application techniques and angles of application of this device entail varying stability and are characterized by certain advantages and drawbacks. Basing on detailed biomechanical studies and experience with patients, the authors prefer the rectangular mode of application using Schanz screws. If the type of fracture allows, a combination of minimal osteosynthesis and external tensor is used; this can significantly enhance the stability. In 42 patients of a total of 56 during 1978-1980 with second-grade and third-grade open fractures of lower leg, combination with minimal osteosynthesis was effected (traction screw). Of 44 patients followed up, 19 achieved stability to load within an average period of 19.8 weeks. If there is no osseous bridging 10-12 weeks after initial treatment, additional measures such as spongiosaplasty and changeover to stable inner fixation with plates become necessary. Following plate osteosynthesis with additional spongiosaplasty, full load was permissible on the average 14 weeks after this procedure in 23 patients. The course was more complicated in the case of the 2 remaining patients; it took up to 45 weeks until full load became permissible.