Why do fractures tend to heal more slowly in older adults?

Fractures tend to heal more slowly in older adults primarily due to physiological changes associated with aging, including a gradual loss of bone mass and calcium, which renders bones more fragile. While the process of bone repair—involving the formation of a callus to bridge the fracture—begins immediately upon injury, the efficiency of this process declines with age.12

Several factors contribute to this delayed healing:

• Reduced Bone Quality: Aging is often accompanied by osteoporosis, a condition characterized by the loss of minerals and bone density, which complicates the structural integrity required for rapid repair.21
• Systemic and Local Factors: Bridging a fracture is hindered by poor blood supply, infection, or excessive motion at the fracture site. In older adults, decreased kidney function and nutritional deficiencies (such as lower calcium and vitamin D intake) can further impact the body's ability to maintain bone health and facilitate efficient remodeling.23
• Cellular Dynamics: The body's capacity for remodeling—the process of resorbing and forming bone to accommodate mechanical demands—is significantly more effective in children than in adults.2