CN2165816Y - 槽式椎弓根钢板及固定螺钉 - Google Patents
槽式椎弓根钢板及固定螺钉 Download PDFInfo
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- CN2165816Y CN2165816Y CN 93222256 CN93222256U CN2165816Y CN 2165816 Y CN2165816 Y CN 2165816Y CN 93222256 CN93222256 CN 93222256 CN 93222256 U CN93222256 U CN 93222256U CN 2165816 Y CN2165816 Y CN 2165816Y
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- screw
- steel plate
- hold
- pedicle
- fixing screw
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 8
- 235000019994 cava Nutrition 0.000 claims description 2
- 210000000115 thoracic cavity Anatomy 0.000 claims description 2
- 208000007356 Fracture Dislocation Diseases 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001356 surgical procedure Methods 0.000 abstract description 2
- 208000007103 Spondylolisthesis Diseases 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000002980 postoperative effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 208000008035 Back Pain Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000008930 Low Back Pain Diseases 0.000 description 1
- 241000906034 Orthops Species 0.000 description 1
- 206010033425 Pain in extremity Diseases 0.000 description 1
- 208000007542 Paresis Diseases 0.000 description 1
- 241000517325 Pediculus Species 0.000 description 1
- 201000006490 Spondylolysis Diseases 0.000 description 1
- 210000003164 cauda equina Anatomy 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000000278 spinal cord Anatomy 0.000 description 1
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Abstract
本实用新型涉及一种槽式椎弓根钢板及固定螺
钉,属于脊柱外科医疗器械。其钢板采用含有连续排
列螺钉穴的中心槽式结构;固定螺钉采用松质骨加压
螺钉结构,较普通螺钉具有直径大、螺距宽、螺纹深等
特点。在手术中,这种钢板及固定螺钉能够适合于不
同椎弓根间距的患者个体,且符合椎体以松质骨为主
的解剖特点,具有良好的整复骨折脱位及脊椎滑脱的
功效,从而保证了手术操作的可靠性和安全性。
Description
本实用新型涉及一种槽式椎弓根钢板及固定螺钉,属于脊柱外科医疗器械。
椎弓根钢板及固定螺钉系统,最早由Roy-Camille首创(见:Clin Orthop,1986;203:7),将其上沿纵向具有多个螺孔的两块钢板置于脊椎两侧的关节突上,然后用固定螺钉固定在椎弓根及椎体上,目前,国内外应用较多。但在临床应用过程中发现,该钢板及固定螺钉存在明显的缺陷,主要表现在:(1)Roy-Camille钢板每个螺孔之间的距离是固定的,而人体由于存在个体间的解剖差异,其椎弓根间距却是不恒定的,因此常发生手术中钢板螺孔位置难以与椎弓根间距相吻合的矛盾,以至给手术造成困难甚至失败;(2)椎体结构以松质骨为主,而Roy-Camille钢板采用的是普通螺钉固定,其直径细(3.5mm),螺纹浅,固定效果较差。
本实用新型的目的是提供一种新型槽式椎弓根钢板及固定螺钉,能够在手术中适合于不同椎弓根间距的患者个体,且符合椎体以松质骨为主的解剖特点,从而保证手术操作的可靠性和安全性。
本实用新型的目的是这样实现的:钢板采用中心槽式结构,即沿钢板纵向中心设置2~3个中心槽,每个中心槽中含有3~6个连续排列的螺钉穴;固定螺钉采用松质骨加压螺钉结构,入骨直径4~6mm(胸椎采用4mm),长度40~60mm,螺距为2~3mm,螺钉头部为六角型,其螺钉头基部呈圆锥形与螺钉穴相配套嵌接。
采用这种结构,固定螺钉可在钢板的每个中心槽内植入任一个螺钉穴,从而解决了Roy-Camille钢板的螺孔位置与椎弓根间距有时不相匹配的矛盾;每个螺钉穴可与螺钉头基部为圆锥形的螺钉相配套嵌接,增加了稳定性且便于手术中植骨;这种固定螺钉较普通螺钉的入骨直径粗、螺距宽、螺纹深,更适合椎弓根以松质骨为主的解剖特点,固定后握持有力,提高了固定的有效性,达到Denis所谓的“三柱”固定效果。
图1是本实用新型的应用示意主视图。
图2是本实用新型的应用示意左视图。
图中标号:1-槽式椎弓根钢板,2-中心槽,3-螺钉穴,4-固定螺钉。
临床实践证明:本实用新型具有良好的整复骨折脱位及脊椎滑脱的功效。临床应用34例,没有1例发生钢板或螺钉折断,对脊锥滑脱病例术后可提高滑脱等级1-2级,平均整复29.2%;对脊柱骨折脱位患者,术后骨折脱位全部得到良好整复,伴有脊髓及马尾神经功能损害者,全瘫者无变化,不全瘫者术后全部恢复到正常水平,3~5周内可下床行走,半年内恢复原工作,无明显腰痛及下肢痛之后遗症。
Claims (2)
1、一种槽式椎弓根钢板及固定螺钉,其特征在于:
a、钢板采用中心槽式结构,即:沿钢板纵向中心设置2~3个中心槽,每个中心槽中含有3~6个连续排列的螺钉穴;
b、固定螺钉采用松质骨加压螺钉结构,入骨直径4~6mm,长度40~60mm,螺距为2~3mm,其螺钉头基部呈圆锥形,与螺钉穴相配套嵌接,螺钉头部为六角型。
2、根据权利要求1所述的槽式椎弓根钢板及固定螺钉,胸椎采用固定螺钉的直径为4mm。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 93222256 CN2165816Y (zh) | 1993-08-27 | 1993-08-27 | 槽式椎弓根钢板及固定螺钉 |
Applications Claiming Priority (1)
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CN 93222256 CN2165816Y (zh) | 1993-08-27 | 1993-08-27 | 槽式椎弓根钢板及固定螺钉 |
Publications (1)
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CN2165816Y true CN2165816Y (zh) | 1994-05-25 |
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CN 93222256 Expired - Fee Related CN2165816Y (zh) | 1993-08-27 | 1993-08-27 | 槽式椎弓根钢板及固定螺钉 |
Country Status (1)
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CN (1) | CN2165816Y (zh) |
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1993
- 1993-08-27 CN CN 93222256 patent/CN2165816Y/zh not_active Expired - Fee Related
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