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Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone.

Publication ,  Journal Article
DeBaun, MR; Swinford, ST; Chen, MJ; Thio, T; Behn, AA; Lucas, JF; Bishop, JA; Gardner, MJ
Published in: Injury
February 2020

OBJECTIVES: To biomechanically compare plated constructs using nonlocking bone-screw-fasteners with interlocking threads versus locking screws with traditional buttress threads in geriatric female bone. METHODS: Eleven matched pairs of proximal and distal segments of geriatric female cadaveric tibias were used to create a diaphyseal fracture model. Nonlocking bone-screw-fasteners or locking buttress threaded screws were applied to a locking compression plate on the anterolateral aspect of the tibia placed in bridge mode. Specimens were subjected to incrementally increasing cyclic axial load combined with constant cyclic torsion. Total cycles to failure served as a primary outcome measure, with failure defined as 2 mm of displacement or 10 degrees of rotation. Secondary outcome measures included initial stiffness in compression and torsion determined from preconditioning testing and overall rigidity as determined by maximum peak-to-peak axial and rotational motion at 500 cycle intervals during cyclic testing. Group comparisons were made using paired Student's t-tests. Significance was set at p < 0.05. RESULTS: Bone-screw-fastener constructs failed at an average of 40,636 ± 22,151 cycles and locking screw constructs failed at an average of 37,773 ± 8433 cycles, without difference between groups (p = =0.610). Total cycles to failure was higher in the bone-screw-fasteners group for 7 tibiae out of the eleven matched pairs tested. During static and cyclic testing, bone-screw-fastener constructs demonstrated increased initial torsional stiffness (7.6%) and less peak-to-peak displacement and rotation throughout the testing cycle(p < 0.05). CONCLUSIONS: In female geriatric bone, constructs fixed with bone-screw-fasteners incorporate multiplanar interlocking thread geometry and performed similarly to traditional locked plating. These novel devices may combine the benefits of both nonlocking and locking screws when plating geriatric bone.

Duke Scholars

Published In

Injury

DOI

EISSN

1879-0267

Publication Date

February 2020

Volume

51

Issue

2

Start / End Page

193 / 198

Location

Netherlands

Related Subject Headings

  • Tibia
  • Outcome Assessment, Health Care
  • Orthopedics
  • Humans
  • Geriatrics
  • Fractures, Bone
  • Fracture Fixation, Internal
  • Female
  • Cadaver
  • Bone Screws
 

Citation

APA
Chicago
ICMJE
MLA
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DeBaun, M. R., Swinford, S. T., Chen, M. J., Thio, T., Behn, A. A., Lucas, J. F., … Gardner, M. J. (2020). Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone. Injury, 51(2), 193–198. https://doi.org/10.1016/j.injury.2019.10.032
DeBaun, Malcolm R., Steven T. Swinford, Michael J. Chen, Timothy Thio, Anthony A. Behn, Justin F. Lucas, Julius A. Bishop, and Michael J. Gardner. “Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone.Injury 51, no. 2 (February 2020): 193–98. https://doi.org/10.1016/j.injury.2019.10.032.
DeBaun MR, Swinford ST, Chen MJ, Thio T, Behn AA, Lucas JF, et al. Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone. Injury. 2020 Feb;51(2):193–8.
DeBaun, Malcolm R., et al. “Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone.Injury, vol. 51, no. 2, Feb. 2020, pp. 193–98. Pubmed, doi:10.1016/j.injury.2019.10.032.
DeBaun MR, Swinford ST, Chen MJ, Thio T, Behn AA, Lucas JF, Bishop JA, Gardner MJ. Biomechanical comparison of bone-screw-fasteners versus traditional locked screws in plating female geriatric bone. Injury. 2020 Feb;51(2):193–198.
Journal cover image

Published In

Injury

DOI

EISSN

1879-0267

Publication Date

February 2020

Volume

51

Issue

2

Start / End Page

193 / 198

Location

Netherlands

Related Subject Headings

  • Tibia
  • Outcome Assessment, Health Care
  • Orthopedics
  • Humans
  • Geriatrics
  • Fractures, Bone
  • Fracture Fixation, Internal
  • Female
  • Cadaver
  • Bone Screws