Orthopaedic Nurses Certification Board (ONCB) Metabolic/Inflammatory/Tumors Practice Exam 2025 – The All-in-One Guide to Mastering Your Certification!

The reasoning for selecting Osteoporosis and Paget's disease as common metabolic bone diseases lies in their classification and clinical significance.

Osteoporosis is characterized by decreased bone density and strength, leading to an increased risk of fractures. It is a widely recognized metabolic disorder associated with aging, hormonal changes, and nutritional deficiencies, notably in calcium and vitamin D.

Paget’s disease, on the other hand, involves abnormal and excessive bone remodeling, resulting in enlarged and weakened bones. It typically affects older adults and can lead to deformities and fractures as well.

Both of these conditions are classified specifically as metabolic bone diseases because they involve alterations in the normal metabolism of bone tissue, affecting bone density and structure.

In contrast, other conditions mentioned in the options do not fit the criteria as well. Scoliosis, while a spinal deformity, is primarily structural in nature rather than a metabolic issue. Rickets and Osteomalacia do indeed pertain to metabolic disturbances, but the focus of common metabolic bone diseases is usually more on osteoporosis and Paget's disease in adult populations. Fibromyalgia, while it can lead to musculoskeletal pain, is not classified as a metabolic bone disease.