Relationship between thread depth and fixation strength in cancellous bone screw.

Aorigele Yu,Shinji Imade,Satoshi Furuya, Koichiro Nakazawa,Kazuma Shiraishi, Toshihiko Kawamura,Yuji Uchio

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association（2022）

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摘要

The pull-out strength of 4.5-mm-diameter metal screws in a cancellous bone model was found to be biphasic, although linearly correlated with the change in screw depth in both phases. The boundary of the correlation was 0.4 mm regardless of the density of the bone model, with the effect of screw depth on pull-out strength beyond that being small in comparison.

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关键词

Cancellous bone screw,Insertion torque,Pull-out strength,Screw thread depth

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