Related Experiment Video
Updated: Mar 30, 2026
08:18
Three-Dimensional Reconstruction of Orbital Fractures
Published on: May 16, 2025
864
Residual Hole Orientation After Plate Removal: Effect on the Clavicle
Orthopedics
|November 13, 2015
Summary
Clavicle fractures are common. This study found that anterior inferior screw holes, left after plate removal, provide greater stiffness and strength than superior holes, reducing reinjury risk.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Traumatology
Background:
- Clavicle fractures represent 2.6%–4% of all fractures.
- Surgical fixation is increasingly common for clavicle injuries.
- Concerns exist regarding reinjury after hardware removal.
Purpose of the Study:
- To compare the biomechanical effects of screw hole orientation after clavicle plate removal.
- To assess differences in stiffness and load to failure between anterior inferior and superior screw holes.
Main Methods:
- 28 matched pairs of fresh clavicles were used.
- Pilot holes were drilled anterior inferiorly or superiorly, simulating post-plate removal.
- Clavicles underwent dynamic axial compression and 3-point load to failure testing.
Main Results:
- Anterior inferior holes demonstrated a statistically significant increase in median maximal load (139 N) compared to superior holes (P=.013).
- Anterior inferior holes showed a significant median increase in stiffness (16.3 N/mm) versus superior holes (P=.036).
Conclusions:
- Anterior inferior screw holes enhance clavicle stiffness and load to failure compared to superior holes.
- This finding is crucial for patients returning to high-impact activities post-hardware removal.
Related Concept Videos
01:09Changes in the Appendicular Skeleton with Age
4.0K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
4.0K
01:26Residual Stresses
934
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
934
01:10Residual Stresses in Circular Shafts
619
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
619