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Bending Cantilever

- See: Broken Femoral Stems:- Discussion:
- bending cantilever fatigue is caused by proximal loss of stem support while distally the stem is securely fixed;
- proximal cement breaks up, but distal portion of stem remains tightly fixed in place;
- subsequent medial migration or deformation of proximal stem results;
- radiolucent zones develop proximally, medial and lateral to the stem, and may progress to stem failure