摘要
目的研制保留寰枢椎各方向活动的仿生人工寰齿关节,探讨其可行性。方法采集30例正常寰枢椎CT数据,用Mimcs 15.0软件三维重建,测量相关解剖学参数,进行统计分析。根据解剖数据设计保留寰枢椎各方向活动的仿生人工寰齿关节。在10具新鲜尸体标本上模拟关节置换术,X-ray及CT检查关节及螺钉位置。结果寰椎侧块中点间距离为(32.53±1.38)mm,侧块中点处高度为(13.48±1.60)mm,椎动脉孔内侧缘间距离为(51.12±2.31)mm,侧块横韧带结节间宽度为(16.23±1.01)mm,前结节至齿状突后缘间距离(18.48±1.77)mm;枢椎:齿状突高度(14.82±1.81)mm,基底部横径(9.53±0.65)mm,前后径(10.91±0.91)mm,椎体高度(19.33±1.77)mm,椎体宽度为(18.19±1.59)mm。人工关节由寰椎部件、枢椎部件及螺钉组成;钢板与骨质贴合好,脊髓未受压,螺钉方向准确;关节置换后寰枢椎的屈伸、侧屈及旋转功能得以保留。结论依据解剖学数据设计的仿生人工寰齿关节匹配性好;寰枢椎在关节置换后不仅能够维持稳定性,还能够保留各方向活动;此关节具有临床置换的可行性。
Objective To design a bionic artificial atlanto-odontoid joint, which can keep the motion of the atlantoaxial axis in all directions, and explore the feasibility of its clinical use. Methods 30 cases of normal atlantoaxial CT data were collected and reconstructed with Mimcs15.0 software. The anatomical parameters were measured and statistically analyzed. Design the joint to retain the activities of all directions according to the anatomical data. Joint arthroplasty were performed on 10 fresh cadaver specimens;X-ray and CT were performed to evaluate joint and screws’ placement. Results The distance between the midpoint of the atlas lateral mass was 32.53mm ± 1.38mm, the height of the lateral mass was 13.48mm ± 1.60 mm, the distance between the medial margin of the vertebral artery hole was 51.12mm ± 2.31mm, the width of the lateral mass was 16.23mm ± 1.01 mm, the distance between the anterior tuberosity and the posterior margin of the odontoid process was 18.48mm ± 1.77mm. The axial height of odontoid process was 14.82mm ± 1.81mm, the basal diameter was 9.53mm ± 0.65mm, the anteroposterior diameter was 10.91mm ± 0.91mm, The vertebral height was 19.33mm ± 1.77mm and the vertebral width was 18.19mm ± 1.59mm. The artificial joint is composed of atlas components, axial components and screws. After operation, the plate and bone are in good condition. The spinal cord is not compressed and the directions of screws were well. The function of flexion, extension and rotation of the atlantoaxial joint can be preserved after joint replacement. Conclusion The anatomical design of the bionic artificial atlanto-odontoid joint is fine; After the joint replacement,the atlantoaxial joint can not only maintain the stability, but also can keep the activities of all directions; This joint has the possibility of clinical replacement.
出处
《生物骨科材料与临床研究》
CAS
2017年第3期1-4,I0003,共5页
Orthopaedic Biomechanics Materials and Clinical Study
基金
国家自然科学基金资助项目(编号:81571209)
陕西省自然科学基金资助(编号2016JM8054)
高等学校博士学科点专项科研基金资助(编号:20120201130009)
