The pylon concept of pelvic anchorage for spinal instrumentation in the human cadaver.

摘要: STUDY DESIGN Human cadavera morphometric analysis of the iliac columns and biomechanical implant testing traditional Galveston technique compared to intrailiac instrumentation entire column. OBJECTIVES To describe anatomy evaluate strength in forward flexion a large spanning column length standard technique. SUMMARY OF BACKGROUND DATA We have observed substantial straight bone pelvis, connecting acetabula sacrum, which may allow for improved spinopelvic instrumentation. METHODS Twenty adult cadaveric pelves were used. Each specimen was oriented computed tomography scanner obtain cross-section columns, begin from 2 cm caudal posterior spines end above at anterior inferior spines. Two different techniques Standard pelvic fixation with paired 6.25-mm diameter rods extending 8 into pelvis (Group 1) 8-mm diameter, 15-cm long custom implants, placed within connected spinal 2). Both constructs had two rigid cross-links rods. Testing performed each construct MTS model 881 5 N/sec until failure occurred. RESULTS The rectangular shaped averaged 15.2 (SD 0.8) length, 2.5 0.3) width consistently straight. orientation as viewed transverse plane 22 degrees laterally directed midsagittal plane. For technique, force occurred mean 682 217) N. implants failed 2153 1370) N (P < 0.004). CONCLUSION human has below spine, traversing sciatic notch, ending spine. shape resembles weight-bearing such tibia. Analogous architectural pylon, this cadaver model, these provides least three times stronger anchorage