Suitability of external fixators for use in the tropics.
External fixation systems proved to decrease the osteomyelitis rate in patients in the tropics compared with internal stabilization. This study was designed to show how external fixators being used for treatment of patients in industrial countries compare with cheap alternatives regarding their suitability for the application in tropical countries. Eleven external fixation systems were compared for stability, cost, weight, variability, handling, and capability of being produced locally. Stiffness, slipping moment, and irreversible deformation were determined in material testing machines. The technically best fixators are expensive and cannot be manufactured locally. The inexpensive constructs lack variability and stability. When cost is not a problem, the Synthes model is recommended. With some restrictions in mechanical stability and variability, the Pfeifer Fixator II and a wooden model offer inexpensive and locally producible alternatives. These results may help to select an external fixation device to meet local needs and possibilities in tropical countries.
Dürselen
L
L
Institut für Unfallchirurgische Forschung und Biomechanik, Universität Ulm-Medizinische Fakultät. lutz.duerselen@medizin.uni-ulm.de
Strecker
W
W
Blana
A
A
Claes
L
L
Kinzl
L
L
D001696:Biomechanical Phenomena; D003906:Developing Countries; D004867:Equipment Design; D016267:External Fixators; D017102:Fracture Healing / Q000502:physiology*; D006801:Humans; D010019:Osteomyelitis / Q000517:prevention & control*; D011183:Postoperative Complications / Q000517:prevention & control*; D012307:Risk Factors; D014329:Tropical Climate