Stabilization of a short juxta-articular bone segment with a circular external fixator.
The objective of the current study was to evaluate the stabilization of a simulated juxta-articular bone segment with a circular external fixator, and to determine which method of fixation improved bending stabilization while preserving the axial dynamization of a three-wire configuration. Frames were divided into three groups: wire, half-pin and hybrid and tested in axial compression, torsion, anteroposterior bending and mediolateral bending. Hybrid frames using 4 mm half-pins improved the anteroposterior stabilization of the short bone segment while maintaining axial characteristics similar to a three-wire frame. Increasing the bending stabilization will improve bone segment alignment while permitting axial micromotion beneficial to bone healing.
Bronson
Dwight G
DG
Texas Scottish Rite Hospital for Children, Dallas, Texas 75219, USA.
Samchukov
Mikhail L
ML
Birch
John G
JG
D001696:Biomechanical Phenomena; D001863:Bone Screws; D001864:Bone Wires; D001842:Bone and Bones; D016267:External Fixators; D006801:Humans; D018889:Ilizarov Technique; D012680:Sensitivity and Specificity; D013314:Stress, Mechanical; D013718:Tensile Strength