Bone Mineral Density – why is it so important?

Why Knowing Your Bone Mineral Density Matters: The Importance of a DEXA Scan

Bone health often goes unnoticed—until there’s a problem. As we age, our bones naturally lose density, making them more fragile and increasing the risk of fractures. Osteoporosis, often called the "silent disease," affects millions of people worldwide and frequently remains undetected until a fracture occurs. This is where bone mineral density (BMD) testing and DEXA scans become essential tools in protecting long-term health and independence.

What Is Bone Mineral Density?

Bone mineral density refers to the amount of mineral matter per square centimetre of bone. It is a key indicator of bone strength and an important predictor of fracture risk. Lower BMD means bones are more porous and weaker, making them more likely to break with even minor falls or injuries.

The Role of the DEXA Scan

A DEXA scan (Dual-Energy X-ray Absorptiometry) is a quick, painless, and non-invasive imaging test used to assess your BMD. It typically measures the density of bones in the spine, hip, or forearm—areas most susceptible to osteoporotic fractures. The results are given as a T-score, which compares your bone density to that of a healthy young adult. A score of -1.0 or above is considered normal, between -1.0 and -2.5 indicates osteopenia (low bone mass), and below -2.5 signals osteoporosis.

Why Is It Important to Know Your Baseline?

1. Early Detection and Prevention
   Knowing your baseline BMD gives you the opportunity to identify early bone loss before it progresses to osteoporosis. With early detection, lifestyle changes and treatment can be implemented to slow down or even reverse bone loss.
2. Informed Treatment Decisions
   For individuals already diagnosed with low BMD or osteoporosis, a DEXA scan helps guide treatment decisions and track how well a treatment plan is working over time.
3. Fracture Risk Reduction
   Fractures related to poor bone health can be life-changing, especially for older adults. They can lead to reduced mobility, loss of independence, and increased mortality. A DEXA scan helps identify your risk and informs proactive steps to reduce it.
4. Relevant for Men and Women
   While osteoporosis is more common in postmenopausal women, men are also at risk—especially those over age 70 or with risk factors like smoking, low testosterone, or chronic illness. Everyone benefits from understanding their bone health.

Who Should Consider a DEXA Scan?

• Women aged from 45 and older
• Men aged 70 and older
• Anyone over 50 with a history of fractures
• People with risk factors: low body weight, smoking, long-term steroid use, family history of osteoporosis

Take Charge of Your Bone Health

Strong bones are essential for staying active, mobile, and independent. A DEXA scan provides valuable insight into your current bone health and empowers you to take steps toward preventing osteoporosis-related complications. Speak with your healthcare provider or physiotherapist about whether a DEXA scan is right for you—because protecting your bones today can protect your quality of life tomorrow.