Premium
Comparison of the biomechanical properties of a ventral cervical intervertebral anchored fusion device with locking plate fixation applied to cadaveric canine cervical spines
Author(s) -
Schöllhorn Bernhard,
Bürki Alexander,
Stahl Christina,
Howard Judith,
Forterre Franck
Publication year - 2013
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.2013.12044.x
Subject(s) - cadaveric spasm , fixation (population genetics) , medicine , anatomy , neutral zone , discectomy , range of motion , cervical spine , fusion , spinal fusion , orthodontics , biomedical engineering , surgery , lumbar , population , linguistics , philosophy , hip flexion , environmental health
Objective To evaluate fixation properties of a new intervertebral anchored fusion device and compare these with ventral locking plate fixation. Study Design In vitro biomechanical evaluation. Animals Cadaveric canine C4–C7 cervical spines (n = 9). Methods Cervical spines were nondestructively loaded with pure moments in a nonconstraining testing apparatus to induce flexion/extension while angular motion was measured. Range of motion (ROM) and neutral zone (NZ) were calculated for (1) intact specimens, (2) specimens after discectomy and fixation with a purpose‐built intervertebral fusion cage with integrated ventral fixation, and (3) after removal of the device and fixation with a ventral locking plate. Results Both fixation techniques resulted in a decrease in ROM and NZ ( P < .001) compared with the intact segments. There were no significant differences between the anchored spacer and locking plate fixation. Conclusion An anchored spacer appears to provide similar biomechanical stability to that of locking plate fixation.