What is typically a characteristic of trabecular bone compared to cortical bone?

• A. Lower turnover rate
• B. Higher density
• C. More vascular supply
• D. More susceptible to fracture

Answer: (D)

Trabecular bone, often referred to as cancellous or spongy bone, has a distinct structure that makes it more susceptible to fractures compared to cortical bone. This type of bone is found at the ends of long bones and in the interiors of others, characterized by a porous, lattice-like architecture that provides structural support while remaining lightweight.

Due to its high surface area and porosity, trabecular bone is metabolically active and more involved in the remodeling process. This activity means that, while it plays a critical role in load distribution and provides a supportive framework within the bone, it is also subject to changes in health conditions such as osteoporosis. In conditions where bone density decreases, the integrity of trabecular bone can be compromised more readily, leading to a higher risk of fractures, particularly in the vertebrae, hips, and wrists.

Cortical bone, on the other hand, has a more dense and solid structure, providing strength and stability; hence it is less prone to fracture under normal conditions. These characteristics highlight the differences between the types of bone, with trabecular bone being more vulnerable due to its structural composition and the nature of its remodeling process.