Increase of pullout strength of spinal p
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Ching-Chi Hsu; Ching-Kong Chao; Jaw-Lin Wang; Sheng-Mou Hou; Ying-Tsung Tsai; Ji
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Article
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2005
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Elsevier Science
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English
โ 790 KB
## Abstract Screw loosening can threaten pedicle screw fixation of the spine. Conical screws can improve the bending strength, but studies of their pullout strength as compared with that of cylindrical screws have shown wide variation. In the present study, polyurethane foam with two different dens