[Dynamical comparison between Drummond's and Luque's operations. An experimental study].
Eleven specimens of spinal segments from cadavers were divided into four groups for the study of the tension endured by the implant applied at the base of the spinous process in different ways till the breaking off of the specimen. The results indicated that the endurance of tension varied in each group and was related directly to the direction of the pulling force. In group 1, in which the force had been perpendicular to the spinous process, the specimen failed at an average force of 513.25 N.; while in group 3, in which parallel force had been applied, it ended at 477.3 N., although the anchoring of the implant, a home made cement-button-wire, had been the same. In group 2, the implant had been laid on both sides and it did not give way until the force up to 764.5 N., a little less than that in group 4, a force of 887.3 N., in which the wire had passed under lamina like that in Luque's operation. We conclude that double fixation would work more effectively on correcting spinal deformity, and that modified Luque operation, instead of sublaminar wiring by anchoring on both sides, cement-button-wire at the base of the spinous process is biomechanically efficient and safe.
Wang
J R
JR
Hunan Provicial people's Hospital, Changsha.
D000328:Adult; D001696:Biomechanical Phenomena; D006801:Humans; D008159:Lumbar Vertebrae / Q000601:surgery*; D013514:Surgical Procedures, Operative / Q000379:methods; D013718:Tensile Strength; D013904:Thoracic Vertebrae / Q000601:surgery*