What is osteoporosis?

Osteoporosis is a bone disease characterized by decreased bone density and structural weakness, increasing the risk of fractures.

What are the main causes of osteoporosis?

Causes include aging, postmenopausal estrogen deficiency, long-term steroid use, poor calcium and vitamin D intake, sedentary lifestyle, and genetic factors.

Who is at highest risk of developing osteoporosis?

Postmenopausal women, elderly individuals, people with low body weight, smokers, chronic steroid users, and those with hormonal disorders are at higher risk.

What are the early symptoms of osteoporosis?

Osteoporosis is often asymptomatic in early stages until fractures occur; early signs may include mild back pain and gradual height loss.

What are common complications of osteoporosis?

Common complications include hip fractures, vertebral compression fractures, chronic back pain, spinal deformity, disability, and increased mortality.

How is osteoporosis diagnosed?

The gold standard diagnostic test is a DEXA scan, which measures bone mineral density and provides a T-score.

What does a T-score of −2.5 indicate?

A T-score of −2.5 or lower confirms the diagnosis of osteoporosis.

What lifestyle changes help prevent osteoporosis?

Regular weight-bearing exercise, adequate calcium and vitamin D intake, smoking cessation, limiting alcohol, and fall prevention strategies help prevent osteoporosis.

What is the first-line treatment for osteoporosis?

Bisphosphonates such as alendronate are the first-line pharmacologic treatment to reduce bone resorption and fracture risk.

What are alternatives if bisphosphonates are not tolerated?

Alternatives include denosumab, raloxifene, teriparatide, and hormone replacement therapy depending on patient profile.

How does vitamin D help in osteoporosis?

Vitamin D improves calcium absorption and supports bone mineralization, reducing bone loss.

What is a fragility fracture?

A fragility fracture is a bone fracture that occurs after minor trauma due to weakened osteoporotic bones.

Can osteoporosis be reversed?

Bone loss cannot be fully reversed, but treatment can significantly improve bone density and reduce fracture risk.

How often should bone density be tested?

DEXA scanning is usually recommended every 1–2 years in high-risk individuals or those on treatment.

What diet is best for osteoporosis?

A diet rich in calcium, vitamin D, protein, leafy greens, dairy products, and fortified foods supports bone health.

Does osteoporosis affect men?

Yes, men can develop osteoporosis, especially with aging, hypogonadism, alcohol use, or long-term medication use.

What medications increase osteoporosis risk?

Long-term corticosteroids, anticonvulsants, heparin, aromatase inhibitors, and excessive thyroid hormone increase osteoporosis risk.

How does teriparatide treat osteoporosis?

Teriparatide stimulates osteoblast activity, promoting new bone formation and improving bone strength.

What are the warning signs of osteoporotic fractures?

Sudden back pain, height loss, spinal curvature, hip pain after minor falls, and reduced mobility are warning signs.

How can falls be prevented in osteoporosis patients?

Home safety modifications, balance training, vision correction, proper footwear, and strength exercises reduce fall risk.

Osteoporosis Causes Symptoms Diagnosis and Treatment Guide

Definition

Osteoporosis is a chronic metabolic bone disease characterized by low bone mass, microarchitectural deterioration of bone tissue, and increased bone fragility, leading to a higher risk of fractures, especially in the hip, spine, and wrist.

Pathophysiology

Bone remodeling normally balances bone formation (osteoblasts) and bone resorption (osteoclasts)
In osteoporosis:

* Bone resorption exceeds bone formation

* Loss of bone density and structural strength occurs

Estrogen deficiency, aging, hormonal imbalance, nutritional deficiencies, and inactivity accelerate bone loss

Causes and Risk Factors

Primary Osteoporosis

Postmenopausal estrogen deficiency
Age-related bone loss (senile osteoporosis)
Genetic predisposition

Secondary Osteoporosis

Endocrine disorders: Hyperthyroidism, Cushing syndrome, diabetes
Chronic kidney or liver disease
Rheumatoid arthritis
Malabsorption syndromes (celiac disease)
Cancer and chemotherapy

Medication-Induced

Long-term corticosteroids
Anticonvulsants
Heparin
Aromatase inhibitors

Lifestyle and Nutritional Causes

Low calcium and vitamin D intake
Smoking and alcohol abuse
Sedentary lifestyle
Low body weight
Poor sunlight exposure

Clinical Features (Symptoms)

Early Stage

Often asymptomatic (silent disease)

Progressive Symptoms

Bone pain (especially back pain)
Fragility fractures (fracture after minor trauma)
Loss of height
Kyphosis (stooped posture / dowager’s hump)
Reduced mobility

Common Fracture Sites

Hip
Vertebrae (spine)
Wrist (Colles fracture)

Complications

Hip fractures leading to disability
Chronic back pain
Spinal deformity
Reduced quality of life
Increased mortality after major fractures

Investigations and Diagnosis

Bone Mineral Density (Gold Standard)

DEXA scan

* T-score ≥ −1: Normal

* T-score −1 to −2.5: Osteopenia

* T-score ≤ −2.5: Osteoporosis

Laboratory Tests

Serum calcium, phosphate
Vitamin D levels
Parathyroid hormone
Thyroid function tests
Renal and liver function tests

Imaging

X-ray (vertebral fractures)
MRI/CT if fracture suspected

Differential Diagnoses

Osteomalacia
Paget’s disease of bone
Bone metastasis
Rheumatoid arthritis
Multiple myeloma

Management and Treatment (Comprehensive)

1. Lifestyle and Non-Pharmacologic Measures

Weight-bearing exercises (walking, resistance training)
Adequate sunlight exposure
Smoking cessation
Alcohol reduction
Fall prevention strategies
Balanced diet rich in calcium and protein

2. Calcium and Vitamin D Supplementation

Calcium

Indication: Bone mineral support
Dose: 1000–1200 mg/day (diet + supplements)
Adverse Effects: Constipation, kidney stones
Contraindications: Hypercalcemia

Vitamin D (Cholecalciferol)

Dose: 800–2000 IU/day
Role: Improves calcium absorption
Monitoring: Serum vitamin D levels

3. Pharmacologic Treatment

A. Bisphosphonates (First-Line)

Examples: Alendronate, Risedronate, Zoledronic acid

Mechanism: Inhibits osteoclast-mediated bone resorption
Dose: Alendronate 70 mg once weekly
Adverse Effects: GI irritation, osteonecrosis of jaw (rare)
Contraindications: Esophageal disorders, severe renal impairment

B. Denosumab

Mechanism: Monoclonal antibody inhibiting osteoclast activity
Dose: 60 mg SC every 6 months
Adverse Effects: Hypocalcemia, infection risk
Indication: Postmenopausal osteoporosis, high fracture risk

C. Selective Estrogen Receptor Modulators (SERMs)

Example: Raloxifene

Mechanism: Estrogen-like effect on bone
Benefit: Reduces vertebral fractures
Risk: Thromboembolism

D. Hormone Replacement Therapy (HRT)

Used in postmenopausal women
Benefits bone density
Risks: Breast cancer, cardiovascular disease

E. Parathyroid Hormone Analogs

Example: Teriparatide

Mechanism: Stimulates new bone formation
Indication: Severe osteoporosis
Duration: Max 2 years

F. Calcitonin

Reduces bone resorption
Provides pain relief in vertebral fractures

4. Fracture Management

Surgical repair (hip fractures)
Pain control
Physical rehabilitation
Fall prevention programs

Prevention Strategies

Adequate calcium and vitamin D intake from early adulthood
Regular physical activity
Early screening after age 50 or high-risk individuals
Minimizing long-term steroid use

Prognosis

Early diagnosis and treatment reduce fracture risk
Untreated osteoporosis leads to progressive disability
Lifelong management improves bone strength and quality of life