ECE4084 Lecture Notes - Lecture 5: American Wire Gauge, Stainless Steel, External Fixation
24 Jul 2018
School
Department
Course
Professor
Document Summary
Cerclage wire: used to denote the use of orthopedic wire placed around the circumference of he bone and compression an oblique fracture: used in combination with other orthopaedic implants to supplement axial, rotational and bending support of fractures. To provide stability to anatomically reconstructed long oblique or spiral fractures: to do this wire must generate sufficient compression between fracture surfaces to prevent fragments from moving or collapsing under the weight-bearing loads. 3 criteria must be met: length of the fracture line should be 2-3 times the diameter of the marrow cavity, there should be a maximum of 3 (preferably 2) fracture fragments, the fracture must be anatomically reduced. When these are met, the cerclage wire can give additional stability by generating enough compression between fragments for healing. Always supported by additional implants that control large weight bearing (primarily bending) forces. If the 3 criteria are not met the wire cannot generate the compression needed to resist weight-bearing loads.
