Locking power type bracket inner fixing device

Abstract

The invention discloses a locking power type bracket inner fixing device. The device comprises rods, nails and blocks. Knurls are longitudinally arranged on the surfaces of the rods, the nails comprise locking screws, locking nuts and pressurizing screws, and the blocks are connecting blocks making the rods and the nails locked and connected; locking screw holes and pressurizing locking holes in the shape of Arabic number 8 are formed in the surfaces of bodies of the connecting blocks; the blocks comprise the sliding block, the end block, the anatomic block and the hook block; the locking screws and the locking nuts can be placed into the pressurizing locking holes in the shape of Arabic number 8 and the locking screw holes respectively to make the rods and the nails locked and connected;the pressurizing holes are in a spherical concave shape, slotted gasket rings are arranged in the locking screw holes, and the slotted gasket rings are matched with spherical faces of the inner wallsof the locking screw holes and matched with the longitudinal knurls on the surfaces of the rods. The low-profile design is used, the connecting structure and function mechanism of the nails and the blocks are innovatively designed, and the design of the pressurizing locking holes in the shape of Arabic number 8 is used in fixing nail connection, so that the overall structure and performance of thedevice are good in operability and practicability.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a locking power type stent internal fixation device. Background technique [0002] At present, the instruments for the treatment of limb and pelvic fractures are mainly divided into two categories, such as intramedullary nail series and nail plate series. Intramedullary nail series is central fixation, which has good biomechanical properties, but has a great impact on intramedullary blood supply, and the surgical indications are narrow, and intramedullary fixation cannot be implemented for fractures of the pelvis and epiphysis; the application of nail-plate series is relatively low. However, due to structural defects, it causes great damage to the periosteum, and biomechanical problems such as stress concentration and stress shielding caused by the eccentric fixation method have not been effectively resolved. In recent years, the combined structure of nails and rods has been u...

AI Technical Summary

Problems solved by technology

Intramedullary nail series is central fixation, which has good biomechanical properties, but has a great impact on intramedullary blood supply, and the surgical indications are narrow, and intramedullary fixation cannot be implemented for fractures of the pelvis and epiphysis; the application of nail-plate series is relatively low. However, due to structural defects, it has great damage to the periosteum, and biomechanical problems such as stress concentration and stress shielding caused by eccentric fixation have not been effectively resolved.

In recent years, the combined structure of nails and rods has been used in limbs and pelvic fractures to obtain good curative effect. This structure has good biological and biomechanical properties and has a wide range of applications. problems such as higher traces, especially in the metaphysis, because the structure of the nail head has more protrusions and affects functional activities

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