The utility model discloses a porous end-plate artificial cervical disc prosthesis, which comprises an upper end-plate and a lower end-plate; a spherical dome I and a conical protrusion I with porous structure are arranged on the upper surface of the upper end-plate; a hemispherical protrusion is arranged on the lower surface of the upper end-plate; a clamping protrusion I is arranged on the lateral edge of the upper end-plate; and a spherical surface with porous structure is arranged on the lower surface of the lower end-plate. Dome II and conical protrusion II. The upper surface of the lower end plate is provided with ellipsoidal grooves. The hemispherical protrusion matches ellipsoidal grooves to form spherical groove joints. The lateral edge of the lower end plate is provided with a downward extending clamping protrusion II. The utility model can retain the anatomical surface of the upper and lower vertebral bodies during operation, reduce the damage of the original structure of the vertebral bodies, and the porous endplate structure has the potential to promote bone growth, so that the artificial cervical intervertebral disc prosthesis has the ability of long-term stability; the spherical groove joint has three-dimensional multi-degree of freedom activities such as rotation, flexion and extension, and lateral bending, so as to meet the motion function of the normal intervertebral disc in the human body.
【技术实现步骤摘要】
一种多孔终板式人工颈椎间盘假体
本技术涉及医疗用品的结构设计和应用
,特别提供一种用于完全替代人体颈椎椎间盘的多孔终板式人工颈椎间盘假体。
技术介绍
颈椎前路间盘切除植骨融合内固定术(ACDF)多年来一度成为治疗颈椎间盘退变的“金标准”。然而尽管该项手术能有效解除病变节段症状,但融合术后会导致病变节段生理活动度丧失,相邻节段运动及负荷增加,将在一定程度上加速邻近节段退变(参见参考文献1.CarrierCS,BonoCM,LeblDR.Evidence-basedanalysisofadjacentsegmentdegenerationanddiseaseafterACDF:asystematicreview.Thespinejournal.2013;13:1370-8.)。其它ACDF的并发症还包括骨不愈合、内固定物移位等。为解决以上问题,人工颈椎间盘假体应运而生。人工颈椎间盘置换手术(ACDR)既保留了原有椎间高度,又有效维持了手术节段的生理活动度,减少了对邻近节段生物力学的影响,从而与ACDF相比可减缓手术邻近节段椎间盘的退变速度,具有替代ACDF的潜力。尽管ACDR在治疗颈椎间盘退变上比ACDF具有更多的优势,但近年来也发现了ACDR相关并发症,比如椎体骨折、人工间盘假体移位、关节面磨损、终板沉陷等,其中终板沉陷发生率据报道可达10%(参见参考文献2.ThalerM,HartmannS,GstottnerM,etal.Footprintmismatchintotalcervicaldiscarthroplasty.EurSpineJ.2013; ...
【技术保护点】
1.一种多孔终板式人工颈椎间盘假体,其特征在于,包括:上终板(1)和下终板(2);所述上终板(1)的上表面设有具有多孔结构的球面穹顶Ⅰ(1a),所述上终板(1)的下表面设有半球形凸起(1b),所述上终板(1)的上表面设有穿透具有多孔结构的球面穹顶Ⅰ(1a)的锥形凸起Ⅰ(1c),所述上终板(1)的侧边缘设有向上延伸的夹持凸台Ⅰ(1d);所述下终板(2)的下表面设有具有多孔结构的球面穹顶Ⅱ(2a),所述下终板(2)的上表面设有椭球形凹槽(2b),所述半球形凸起(1b)与椭球形凹槽(2b)匹配构成球槽关节,所述下终板(2)的下表面设有穿透具有多孔结构的球面穹顶Ⅱ(2a)的锥形凸起Ⅱ(2c),所述下终板(2)的侧边缘设有向下延伸的夹持凸台Ⅱ(2d)。
【技术特征摘要】
1.一种多孔终板式人工颈椎间盘假体,其特征在于,包括:上终板(1)和下终板(2);所述上终板(1)的上表面设有具有多孔结构的球面穹顶Ⅰ(1a),所述上终板(1)的下表面设有半球形凸起(1b),所述上终板(1)的上表面设有穿透具有多孔结构的球面穹顶Ⅰ(1a)的锥形凸起Ⅰ(1c),所述上终板(1)的侧边缘设有向上延伸的夹持凸台Ⅰ(1d);所述下终板(2)的下表面设有具有多孔结构的球面穹顶Ⅱ(2a),所述下终板(2)的上表面设有椭球形凹槽(2b),所述半球形凸起(1b)与椭球形凹槽(2b)匹配构成球槽关节,所述下...
【专利技术属性】
技术研发人员:朱悦,袁伟,
申请(专利权)人:中国医科大学附属第一医院,
类型:新型
国别省市:辽宁,21
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