Semi-opened and semi-closed spine ilium bolt
A half-open and half-closed screw technology, applied in the direction of internal bone synthesis, internal fixator, fixer, etc., can solve the problems of difficult surgery, troublesome bending of connecting rods, and difficulty in inserting waist-shaped holes, so as to shorten the operation time, The effect of convenient operation and elimination of hidden dangers in surgery
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[0024] Refer to attached Figure 1~4 A semi-open and semi-closed spinal iliac screw includes a nail cap 1 , an intermediate body 2 , a collar 3 and a screw 4 .
[0025] The inside of the nail cap 1 is hollow, and the top of the nail cap 1 is provided with an internally threaded hole 1-1, and there are two waist-shaped holes in the circumference of the nail cap, one of which is closed, and the waist-shaped hole is closed for the nail cap. 1-3, the other waist-shaped hole is open, and the waist-shaped hole 1-2 is opened for the nail cap to facilitate the placement of the lateral connecting rod.
[0026] The intermediate body 2 is provided with a hemispherical inner cavity 2-2, and a through hole 2-1 is formed at the top of the intermediate body 2.
[0027] The head of the screw 4 is a spherical structure, and the top of the spherical structure has a screw ball head step 4-2, and the upper end of the head is provided with a screw inner hexagonal hole 4-1, and the screw 4 head is...
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