Minimally invasive screw with double threaded plugs
AssigneesHuanyu Hu, Beijing Fule Science & Techology Development Co., Ltd.
InventorsWenzhi Zhang, Xiyi Huang, Guoshuai Miu, Yaling Wang, Wensheng Lu, Hongyan Li
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Abstract
A minimally invasive screw with double threaded plugs is provided, for connecting to a connecting rod. The screw includes an inner threaded plug, an outer threaded plug, a lengthened arm connector, a press block and a pin with a hollow ball head. The connecting rod can be fixed to the lengthened arm connector via the press block, the inner and outer threaded plugs, to prevent the vertebral body from rotating and loss of intervertebral height when the vertebral body is distracted and pressurized.
Claims11
A minimally invasive screw with double threaded plugs, connecting to a connecting rod, comprising:
- an inner threaded plug,
- an outer threaded plug,
- a lengthened arm connector including an inner wall, an outer wall, and an end,
- a press block and
- a pin with a hollow ball head,
- wherein, the lengthened arm connector has a hollow interior, the connecting rod is configured to pass transversely through the lengthened arm connector, the outer threaded plug is movably disposed inside the lengthened arm connector, the inner threaded plug is movably disposed inside the outer threaded plug and is able to make the connecting rod be fixed on the lengthened arm connector, and the press block is disposed on the inner wall of the lengthened arm connector to make the pin be fixed to the end of the lengthened arm connector.
Dependencies are inferred from the claim text.