In vitamin D deficiency, what happens to osteoid mineralization?

In vitamin D deficiency, what happens to osteoid mineralization?

• A. Insufficient mineralization of newly formed osteoid
• B. Normal mineralization
• C. Excess mineralization
• D. Hypermineralization

Answer: (A)

Vitamin D is essential for the mineralization of bone by ensuring adequate calcium and phosphate availability for osteoid to harden. When vitamin D is deficient, calcium and phosphate absorption decrease, so the mineralization front cannot deposit enough minerals into the newly formed osteoid. The result is insufficient mineralization of the osteoid that osteoblasts have laid down, producing conditions like osteomalacia in adults and rickets in children. The mineralizing process itself isn’t overactive or excessive; it’s simply impaired due to lack of minerals.

Vitamin D is essential for the mineralization of bone by ensuring adequate calcium and phosphate availability for osteoid to harden. When vitamin D is deficient, calcium and phosphate absorption decrease, so the mineralization front cannot deposit enough minerals into the newly formed osteoid. The result is insufficient mineralization of the osteoid that osteoblasts have laid down, producing conditions like osteomalacia in adults and rickets in children. The mineralizing process itself isn’t overactive or excessive; it’s simply impaired due to lack of minerals.