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How can vertebral compression fractures lead to loss of height and a curved upper back?

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bone disease Defect of tibia, caused by septic osteomyelitis in childhood, with compensatory thickening of the fibula (right). Normal bones are shown at left.

Vertebral compression fractures are a common consequence of osteoporosis, a metabolic bone disease that causes bones to become porous, thin, and fragile.1

When these weakened thoracic vertebrae sustain compression fractures—often from minimal or no trauma—the structural integrity of the spine is compromised. As the vertebrae collapse, the spine is forced to bend forward, which results in a visible, increased curvature of the upper back known as kyphosis (or "dowager’s hump"). This collapse of the vertebral column also leads to a measurable loss of height.12

While these fractures can sometimes be identified by sudden, sharp back pain, they are frequently asymptomatic and may only be discovered incidentally through X-ray imaging. Maintaining bone health through adequate calcium and vitamin D intake, alongside weight-bearing exercise, is essential for preventing the bone loss that makes such fractures possible.1