How Surgeons Decide Between Screws and Total Hip Arthroplasty in Seniors

How Surgeons Decide Between Screws and Total Hip Arthroplasty in Seniors

Hip fractures in older adults are often the result of low-energy falls in bones weakened by osteoporosis. When a fracture occurs, surgeons must choose between internal fixation (using screws, plates or nails) and hip replacement (total hip arthroplasty). Understanding how this decision is made can help you discuss treatment options with your care team and set realistic expectations.

Osteoporosis Hip Fracture Internal Fixation vs Replacement: An Overview
Surgeons weigh many factors before recommending either approach. Broadly speaking:

• Internal fixation
– Involves placing screws, plates or rods to hold the broken bone together while it heals.
– Common methods include multiple cancellous screws, a dynamic hip screw (DHS) or an intramedullary (IM) nail.

• Total hip arthroplasty (THA)
– Replaces the damaged femoral head and acetabulum (hip socket) with metal and plastic (or ceramic) components.
– Often used in displaced fractures where blood supply to the bone is compromised or in patients with pre-existing arthritis.

Key Patient and Fracture-Related Factors

1. Fracture type and location
   – Intracapsular fractures (just below the femoral head) have a higher risk of nonunion and avascular necrosis due to disrupted blood flow.
   – Extracapsular fractures (below the neck of the femur) tend to heal more reliably with fixation.

2. Displacement and stability
   – Non-displaced or minimally displaced intracapsular fractures may do well with screw fixation.
   – Displaced fractures often require replacement to restore function and reduce reoperation risk.

3. Bone quality (Osteoporosis)
   – Poor bone density makes screw purchase less secure, increasing the risk of fixation failure.
   – In severe osteoporosis, cemented stems in THA can provide immediate stability.

4. Pre-injury mobility and activity level
   – Highly active seniors may benefit from the long-term durability of a replacement.
   – Less active or frail patients who may not tolerate a longer operation could be better served by a shorter, less invasive fixation.

5. Overall health and comorbidities
   – Heart, lung or kidney conditions may limit tolerance for blood loss and anesthesia time during a replacement.
   – However, a failed fixation that requires later surgery carries its own risks.

Benefits and Drawbacks of Fixation vs Replacement
Surgeons discuss the pros and cons of each approach in plain terms so patients and families can make informed decisions.

Internal Fixation
• Pros
– Less surgical trauma, shorter operating time
– Less blood loss and lower infection risk
– Retains patient’s natural hip anatomy

• Cons
– Higher failure rates in osteoporotic bone: up to 30% may need reoperation
– Nonunion (bone doesn’t heal) or avascular necrosis (bone death) in up to 20% of displaced intracapsular fractures
– Prolonged restricted weight-bearing on the injured leg

Total Hip Arthroplasty
• Pros
– Immediate stability; most patients can bear weight fully soon after surgery
– Lower reoperation rate in displaced fractures (studies report < 5% revision at one year)
– Better pain relief and function in patients with pre-existing hip arthritis

• Cons
– Longer surgery and anesthesia time (often 90–120 minutes)
– Greater blood loss; potential need for transfusion
– Risks of dislocation (2–4%), infection (1–2%), and cardiopulmonary complications in high-risk seniors

Evidence from Clinical Studies
• A large randomized trial in displaced intracapsular fractures found that total hip replacement led to better long-term mobility and fewer reoperations than internal fixation.
• Meta-analyses show that in patients over 75 with poor bone quality, THA or hemiarthroplasty reduces the need for a second surgery by 80% compared to screws alone.
• For extracapsular fractures (e.g., intertrochanteric), fixation with an intramedullary nail generally outperforms replacement in terms of healing rates and functional recovery.

Clinical Pathway: How the Decision Gets Made

1. Initial assessment
   – History, physical exam and review of medical comorbidities
   – Standard X-rays identify fracture type; CT or MRI may be used if X-rays are inconclusive

2. Risk stratification
   – Anesthesia team evaluates heart and lung function
   – Lab tests assess anemia, kidney function and infection risk

3. Multidisciplinary discussion
   – Orthopaedic surgeon, anesthesiologist, geriatrician or internist review the case
   – Physical therapists and social workers weigh in on post-op rehab potential and home support

4. Patient and family consultation
   – Surgeon explains expected recovery, weight-bearing restrictions, complication rates
   – Patient’s goals (return to independent living, pain control) guide final choice

5. Pre-op optimization
   – Correct anemia, stabilize heart or lung conditions
   – Begin osteoporosis treatment to improve bone health and reduce future fractures

Post-operative Care and Rehabilitation
Regardless of the chosen procedure, early mobilization is critical. Protocols typically include:
• Day 1–2: Sit up in bed, dangle feet, assisted transfers to chair
• Days 2–5: Walk with a walker or crutches, two-person assist as needed
• Weeks 2–6: Progress to single-point cane; home or inpatient rehab; begin osteoporosis medications (bisphosphonates, denosumab)
• Months 3–6: Transition to full weight-bearing, independent ambulation, balance and strength exercises

Preventing Future Fractures
Addressing osteoporosis is just as important as treating the current fracture. Surgeons and medical teams will:
• Initiate bone-strengthening treatments
• Recommend vitamin D and calcium supplementation
• Arrange bone density testing (DXA scan)
• Encourage lifestyle modifications: diet, safe exercise, fall prevention at home

When to Seek Medical Advice
Hip pain, inability to bear weight, or changes in leg length after a fall warrant immediate evaluation in an emergency department. For non-urgent concerns—like persistent groin or thigh discomfort days to weeks after a minor fall—you might try a free, online symptom check, using the doctor approved Ubie Symptom Checker.

Remember, only a qualified health professional can diagnose and treat serious conditions. If you suspect a fracture, infection, blood clot or other life-threatening problem, speak to a doctor right away.

Summary
Choosing between osteoporosis hip fracture internal fixation vs replacement in seniors is never one-size-fits-all. Surgeons consider fracture type, bone quality, patient health and functional goals. While screw fixation may suit stable, non-displaced breaks in relatively healthy patients, total hip arthroplasty often delivers better long-term outcomes in displaced fractures or those with poor bone stock. Early surgery, a multidisciplinary approach and aggressive osteoporosis management help seniors regain mobility and reduce the risk of future breaks.

For any concerns about hip pain or mobility after a fall, don’t wait: speak to a doctor and explore your options.