title: Impact of injury on changes in biomechanical loads in human lumbar spine.
abstract: Implementation of new spine stabilisation systems should be preceded by the analysis of the behaviour of healthy and damaged spine under laboratory conditions. Research was performed on two-part and three-part segments without damage and with disc damage in the two-part segment, and with a wedge cut in the vertebra in the three-part segment. In the two-part segment, a relative power necessary for inducing extension-compression in the damaged segment is twice as high as in the damaged three-part segment. In the damaged two-part segment, the motion in the sagittal plane needs a relative power being more than twice as high as in the damaged three-part segment. Yet absolute average values of powers examined in the two-part and three-part segment systems in the undamaged spine for all types of motion were similar, with slight advantage of the two-part segment system. Basic two-part segment of the spine motion system is its most stable functional part.
authors.affiliation: Department of Orthopaedics and Traumatology, Nicolaus Copernicus University in Toruń, Collegium Medicum in Bydgoszcz, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Pawłowski
authors.forename: Maciej
authors.initials: M
authors.lastname: Araszkiewicz
authors.forename: Tomasz
authors.initials: T
authors.lastname: Topoliński
authors.forename: Dariusz
authors.initials: D
authors.lastname: Matewski
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D019245:Compressive Strength / Q000502:physiology; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007403:Intervertebral Disc / Q000503:physiopathology; D008159:Lumbar Vertebrae / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D013124:Spinal Injuries / Q000503:physiopathology* / Q000601:surgery; D016474:Weight-Bearing / Q000502:physiology