STUDY DESIGN: Intradiscal pressure and intersegmental rotation of human lumbar spines were measured in vitro. OBJECTIVES: To determine the effect of a follower load on mechanical behavior at all levels of the lumbar spine. SUMMARY OF BACKGROUND DATA: Different loads have been proposed for studying the mechanical behavior of the lumbar spine. The influence of a follower load on intradiscal pressure at the different levels is unknown. METHODS: Ten human cadaveric lumbar spines were loaded in the three main anatomic planes with pure moments of 3.75, 7.5, and 7.5 Nm plus a follower load of 280 N. Intradiscal pressure and intersegmental rotation were measured at all levels. RESULTS: An additional follower load increased the intradiscal pressure, slightly reduced the intersegmental rotation for axial rotation, and hardly affected intersegmental rotation for lateral bending and flexion-extension. CONCLUSIONS: A superimposed follower load renders spinal loading with pure moments more physiologic.
STUDY DESIGN: Intradiscal pressure and intersegmental rotation of human lumbar spines were measured in vitro. OBJECTIVES: To determine the effect of a follower load on mechanical behavior at all levels of the lumbar spine. SUMMARY OF BACKGROUND DATA: Different loads have been proposed for studying the mechanical behavior of the lumbar spine. The influence of a follower load on intradiscal pressure at the different levels is unknown. METHODS: Ten human cadaveric lumbar spines were loaded in the three main anatomic planes with pure moments of 3.75, 7.5, and 7.5 Nm plus a follower load of 280 N. Intradiscal pressure and intersegmental rotation were measured at all levels. RESULTS: An additional follower load increased the intradiscal pressure, slightly reduced the intersegmental rotation for axial rotation, and hardly affected intersegmental rotation for lateral bending and flexion-extension. CONCLUSIONS: A superimposed follower load renders spinal loading with pure moments more physiologic.
Authors: Hannes Haberl; Peter A Cripton; Tracy-E Orr; Thomas Beutler; Hanspeter Frei; Wolfgang R Lanksch; L-P Nolte Journal: Eur Spine J Date: 2004-05-07 Impact factor: 3.134
Authors: Brandon Santoni; Andres F Cabezas; Daniel J Cook; Matthew S Yeager; James B Billys; Benjamin Whiting; Boyle C Cheng Journal: Int J Spine Surg Date: 2015-07-17
Authors: Christina A Niosi; Qingan A Zhu; Derek C Wilson; Ory Keynan; David R Wilson; Thomas R Oxland Journal: Eur Spine J Date: 2005-10-11 Impact factor: 3.134