Liu Guan-Yi, Xu Rong-Ming, Ma Wei-Hu, Sun Shao-Hua, Feng Jian-Xiang, Wang Yi-Jin
Department of Orthopaedics, Sixth Hospital of Ningbo, Ningbo 315040, Zhejiang, China.
Zhongguo Gu Shang. 2010 Jun;23(6):451-3.
To compare the cervical stabilities of transarticular screw fixation alone, and transarticular screw and plate fixation system.
Twelve specimens of cervical vertebra containing C2-T1 were obtained from human cadaver. The three-column instability model was made at C4.5 and C5.6 levels. The specimens were stabilized with transarticular screw fixation alone, and transarticular screw and plate fixation system respectively. The ranges of motion of segments including intact group, transarticular screw fixation alone group and transarticular screw and plate fixation system group were measured under the torque of 2.0 N x m in flexion, extension, lateral bending, and torsion respectively under nonrestrictive and nondestructive condition.
The rang of motion (ROM) and neutral zone (NZ) of both transarticular screw fixation alone and transarticular screw and plate fixation system group were significantly smaller than those of intact group in all directions (P < 0.05). The transarticular screw and plate fixation system group allowed a very smaller ROM and NZ than transarticular screw fixation alone during extension, lateral bending and axial rotation except flexion (P < 0.05).
Cervical transarticular screw and plate fixation system provides better stability than transarticular screw fixation alone. If the transarticular fixation technique is preferred, transarticular screw and plate fixation system will be beneficial.
比较单纯经关节螺钉固定与经关节螺钉及钢板固定系统的颈椎稳定性。
从人体尸体获取12个包含C2 - T1的颈椎标本。在C4.5和C5.6水平建立三柱不稳模型。标本分别采用单纯经关节螺钉固定以及经关节螺钉及钢板固定系统进行稳定。在非限制性和非破坏性条件下，分别在2.0 N·m的扭矩下测量完整组、单纯经关节螺钉固定组和经关节螺钉及钢板固定系统组各节段在屈伸、侧屈和扭转时的活动范围。
单纯经关节螺钉固定组和经关节螺钉及钢板固定系统组在所有方向上的活动范围（ROM）和中性区（NZ）均显著小于完整组（P < 0.05）。除屈曲外，经关节螺钉及钢板固定系统组在伸展、侧屈和轴向旋转时的ROM和NZ比单纯经关节螺钉固定组更小（P < 0.05）。
颈椎经关节螺钉及钢板固定系统比单纯经关节螺钉固定提供更好的稳定性。如果首选经关节固定技术，经关节螺钉及钢板固定系统将是有益的。
