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Navigated Hip Arthroplasty Surgery

Computer-assisted total hip arthroplasty using image-guided navigation systems (imageless infrared, CT-based, or fluoroscopy-based) to improve precision of acetabular cup positioning, leg length, offset, and stem alignment, reducing component malposition and complications.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

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This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Ortopedi ve Travmatoloji department. Book Appointment →

What is Navigated Hip Arthroplasty Surgery?

Computer-assisted/navigated total hip arthroplasty (THA) uses navigation systems to provide real-time intraoperative guidance for component positioning, leg length, offset, and alignment. Various technologies exist: imageless infrared optical navigation (anatomical landmarks tracked with reflective markers), CT-based navigation (preoperative CT registered intraoperatively), fluoroscopy-based, accelerometer-based, and inertial measurement systems.

Goals are to improve accuracy of acetabular cup positioning (traditional Lewinnek safe zone: 40°±10° inclination, 15°±10° anteversion; modern functional/spinopelvic zones based on patient-specific spinopelvic mobility), leg length equality, femoral offset restoration, and stem alignment. These factors influence dislocation rate, polyethylene wear, impingement, leg length discrepancy, and patient satisfaction.

Evidence shows navigation reduces outliers in cup positioning (fewer cups outside target zone), improves precision of leg length restoration, and may reduce dislocation rate in certain studies. Trade-offs include longer operative time (~10-15 minutes), learning curve, additional cost, and need for accurate registration. Recent advances include patient-specific spinopelvic analysis (sit-to-stand pelvic tilt assessment) and robotic-assisted THA (MAKO, ROSA, Navio) which represent evolution from navigation to active execution. Direct comparisons with conventional manual THA show similar mid-term clinical outcomes but better radiographic accuracy with navigation.

Symptoms

Hip osteoarthritis with severe pain, stiffness
Failed conservative therapy (NSAIDs, injections, physical therapy)
Functional limitation (gait, stairs, ADLs)
Avascular necrosis of femoral head
Inflammatory arthritis (RA, AS)
Post-traumatic arthritis

Risk Factors

Same indications as conventional THA: end-stage hip arthritis
Complex anatomy (developmental dysplasia, prior surgery)
Spinopelvic mobility abnormalities (lumbar fusion, ankylosing spondylitis)
Bilateral or staged hip replacements
Patients with high functional demands
Center expertise and equipment availability

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • End-stage hip pain affecting quality of life
  • Failed conservative management
  • Hip arthritis with complex anatomy
  • Prior spinal fusion considering THA
  • Interest in advanced surgical technology
  • Failed prior hip surgery considering revision

Treatment Methods

01
Comprehensive evaluation: clinical examination, hip radiographs (AP pelvis, lateral hip), CT for navigation
02
Spinopelvic assessment (standing and seated lateral lumbar/pelvis radiographs) for dynamic planning
03
Preoperative templating with navigation software for component sizing and position
04
Anesthesia (general or regional), antibiotic prophylaxis, tranexamic acid
05
Approach: anterior, anterolateral, posterior (surgeon preference)
06
Navigation registration: anatomical landmarks (imageless), CT registration, or fluoroscopy
07
Real-time navigation guidance for: acetabular cup inclination/anteversion, femoral neck cut, stem position, leg length, offset
08
Final verification of leg length, hip stability, range of motion
09
Postoperative: weight-bearing as tolerated, hip precautions per approach, physical therapy
10
Long-term: high success rate (similar to conventional THA in 5-10 year outcomes); lower outlier rate in cup position

Which Department to Visit?

You can visit our Ortopedi ve Travmatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.