A sliding hip screw augmented with 2 screws is biomechanically similar to an inverted triad of cannulated screws in repair of a Pauwels type-III fracture

Pauwels III femoral neck fractures are highly unstable. These fractures are commonly treated with three cannulated screws or sliding hip screw (SHS) implants, however high rates of non-union persist. A hybrid SHS construct has recently been proposed. The objective of the study was to compare this co...

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Bibliographic Details
Published in:Injury 2017-08, Vol.48 (8), p.1743-1748
Main Authors: Kemker, B., Magone, K., Owen, J., Atkinson, P., Martin, S., Atkinson, T.
Format: Article
Language:English
Subjects:
Artificial Organs
Biomechanical Phenomena
Bone Screws
Cannulated triad
Dynamic hip screw
Equipment Failure Analysis
Femoral neck fracture
Femoral Neck Fractures - surgery
Femur
Femur fracture
Fracture Fixation, Internal - instrumentation
Hip biomechanics
Humans
Models, Anatomic
Pauwells III
Reproducibility of Results
Sawbones
Sliding hip screw
Stress, Mechanical
Weight-Bearing
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Summary:Pauwels III femoral neck fractures are highly unstable. These fractures are commonly treated with three cannulated screws or sliding hip screw (SHS) implants, however high rates of non-union persist. A hybrid SHS construct has recently been proposed. The objective of the study was to compare this construct to the familiar inverted triad of cannulated screws and to a single SHS. Fourth generation biomechanical femur analogs were used to create a highly repeatable injury model. The hybrid SHS construct contained a SHS with two superior cannulated screws in an inverted triangle configuration. Eight samples for each construct were biomechanically evaluated and the results compared using ANOVA (p
ISSN:0020-1383
1879-0267
DOI:10.1016/j.injury.2017.05.013