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BioMed Research International
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2014
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Article
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Fig 3
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Review Article
Designs and Techniques That Improve the Pullout Strength of Pedicle Screws in Osteoporotic Vertebrae: Current Status
Figure 3
Posterior angle of various thread designs of pedicle screws: (a) standard, (b) buttress, and (c) square.
(a)
(b)
(c)