A biomechanical analysis of four anterior cervical techniques to treating multilevel cervical spondylotic myelopathy: a finite element study

Abstract Background The decision to treat multilevel cervical spondylotic myelopathy (MCSM) remains controversial. purpose of this study is compare the biomechanical characteristics intervertebral discs at adjacent segments and internal fixation, provide scientific experimental evidence for surgical treatment MCSM. Methods An intact C2-C7 spine model was developed validated. Four additional models were from fusion model, including anterior discectomy (mACDF), corpectomy (ACCF), hybrid decompression (HDF), mACDF with cage alone (mACDF-CA). Biomechanical on plate disc levels (C2/3, C6/7) comparatively analyzed. Results Of four models, stress upper (C2/3) lowest in mACDF-CA group highest ACCF group. Stress higher C2/3 than lower C6/7 disc. In all had disc, while stress. three titanium fixation (mACDF, ACCF, HDF), plate-screw interface, Conclusion Among reconstructive techniques MCSM, makes little effect stress, which might reduce incidence segment degeneration (ASD) after fusion. However, accompanying risk increased subsidence should never be neglected.