Primary metabolic bone disorder in scurvy is –
Decreased mineralization
Decreased osteoid matrix formation
Increased bone resorption
Decreased bone mass with normal mineralization and osteoid formation
Collagen is a component of osteoid (protein matrix).
Collagen synthesis is deficient in scurvy; therefore, osteoid formation is defective.
On the other hand, in rickets osteoid formation is noinial, but mineralization (Calcification) of osteoid is defective.