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Original ArticleOpen Access
Anterior Stabilization in the Pubic Symphysis Separation : A Mechanical Testing
Waikakul S 
,
Soparat K ,
Harnroongroj T
,
Soparat K ,
Harnroongroj T Four types of commonly used instruments, I) external fixation, 2) tension wiring, 3) tension
band wiring, and 4) single superior plating, for anterior stabilization of the diastasis pubic
symphysis were tested for their mechanical properties under single load to failure in cadaveric
pelvis by a universal testing machine. Three directions of loading, transverse tension, vertical
tension and saggital compression, were used to test each type of instrumentation. Five specimens
of each fixation were used for each direction of testing. The strongest instrumentation was single
superior plating. Early mobilization can be advocated in the patient after fixation with this
instrument. External fixation could resist transverse and saggital compression load at an acceptable
level but not the vertical load. Tension band wiring could better resist vertical load than the other
directions. Tension wiring was the weakest instrumentation and early ambulation should be
avoided.
Key word : Pubic Symphysis Separation - Anterior Stabilization - Mechanical Testing
band wiring, and 4) single superior plating, for anterior stabilization of the diastasis pubic
symphysis were tested for their mechanical properties under single load to failure in cadaveric
pelvis by a universal testing machine. Three directions of loading, transverse tension, vertical
tension and saggital compression, were used to test each type of instrumentation. Five specimens
of each fixation were used for each direction of testing. The strongest instrumentation was single
superior plating. Early mobilization can be advocated in the patient after fixation with this
instrument. External fixation could resist transverse and saggital compression load at an acceptable
level but not the vertical load. Tension band wiring could better resist vertical load than the other
directions. Tension wiring was the weakest instrumentation and early ambulation should be
avoided.
Key word : Pubic Symphysis Separation - Anterior Stabilization - Mechanical Testing
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