Zou D, Hai Y, Ma H
514th Hospital of People's Liberation Army, Beijing.
Zhonghua Wai Ke Za Zhi. 1995 Apr;33(4):219-21.
For anatomic reduction of the spinal frectures, the 3 dimensional multiple correction forces were needed. Several pedical screw systems were designed for reducion and fixation of the spinal fractures as the AO universal joint system and the RF angle screw system. Because of the contradiction of the universal joint and the fixed angle, a new generation of RF was designed and named AF (atlas fixator) system. This is a new concept of 3-D reduction, without complex structure as universal joint, but has truly 3-D adjustment that allowed to reduce the intra-canal compromise. It also provided rigid fixation to maintain the reduction. Comparison with CD, AO, Steffee, and RF, the AF was truly 3-D reduction in XTZ axis. It provided strong symmetric transmitter orthotic force to correct the deformity. 31 patients with unstable thoracolumbar fractures were treated with the new AF system. 17 had partial (15) or complete (2) neurologic deficits. The AF system provided accurate angle to restore the normal thoracic-lumbar lordosis and to maintain it. All patients had a anatomic reduction by AF system. The spinal canal area increased over 33% by CT scan (P < 0.01). All cases were followed up over 8 months. No one deteriorated neurologically after AF fixation.
对于脊柱骨折的解剖复位，需要三维多重矫正力。为脊柱骨折的复位和固定设计了几种椎弓根螺钉系统，如AO通用关节系统和RF角度螺钉系统。由于通用关节和固定角度的矛盾，设计了新一代的RF并命名为AF（寰椎固定器）系统。这是一种三维复位的新概念，不像通用关节那样结构复杂，但具有真正的三维调整功能，可减少椎管内的损伤。它还提供了坚固的固定以维持复位。与CD、AO、Steffee和RF相比，AF在XTZ轴上实现了真正的三维复位。它提供强大的对称传递矫正力以纠正畸形。31例不稳定胸腰椎骨折患者采用新型AF系统治疗。17例有部分（15例）或完全（2例）神经功能缺损。AF系统提供准确的角度以恢复正常的胸腰段前凸并维持之。所有患者均通过AF系统实现了解剖复位。CT扫描显示椎管面积增加超过33%（P<0.01）。所有病例均随访8个月以上。AF固定后无一例神经功能恶化。
