Joint replacement surgery has transformed the lives of millions of people suffering from arthritis, but what happens when a hip or knee replacement fails? Revision surgery represents one of the most technically demanding areas in orthopedic surgery, requiring specialized expertise, advanced implants, and thoughtful surgical planning.
In Episode 28 of The Joint Replacement Podcast, I had the opportunity to speak with Dr. H. John Cooper, an adult reconstruction and revision joint replacement surgeon at Columbia University Irving Medical Center. Dr. Cooper is nationally recognized for treating complex hip and knee problems including failed joint replacements, infection, bone loss, instability, and periprosthetic fractures.
Our conversation covered everything from revision surgery and robotic-assisted knee replacement to pain management, artificial intelligence, and where joint replacement surgery is headed over the next decade.
How an Engineering Student Became a Joint Replacement Surgeon
Unlike many orthopedic surgeons, Dr. Cooper knew remarkably early what he wanted to do.
While studying biomedical engineering at Duke University, he learned about artificial joints during his freshman year and became fascinated by the idea of designing—and ultimately implanting—joint replacements. That experience led him toward medicine with the singular goal of becoming a hip and knee replacement surgeon.
Why Revision Joint Replacement Is Different
Primary hip and knee replacements are among the most successful procedures in modern medicine.
Revision surgery is different.
Patients may require revision surgery because of:
- Implant loosening
- Infection
- Instability
- Wear
- Periprosthetic fractures
- Bone loss
- Failure of previous revision surgery
Each case presents unique challenges, often requiring specialized implants, cones, augments, stems, and meticulous reconstruction techniques to restore stability and function.
Can Oral Steroids Improve Knee Replacement Recovery?
One of the most exciting discussions centered around Dr. Cooper’s prospective randomized controlled trial evaluating a short postoperative course of oral steroids after total knee replacement.
Patients who received a six-day Medrol Dose Pack experienced:
- Less postoperative pain
- Lower narcotic use
- Fewer days requiring opioids
- Less nausea
- Faster early recovery
Following completion of the study, Columbia incorporated this protocol into routine postoperative care for many knee replacement patients. Dr. Cooper also discussed careful patient selection and his experience safely expanding the protocol beyond the original research population.
Robotic Knee Replacement Continues to Evolve
Robotic-assisted knee replacement has become an increasingly important tool for understanding each patient’s unique anatomy.
Dr. Cooper explained that robotics allows surgeons to:
- Measure anatomy with remarkable precision
- Customize implant positioning
- Better restore native joint alignment
- Improve reproducibility
Like many experienced robotic surgeons, his philosophy has gradually shifted toward a more kinematic or anatomy-restoring approach rather than applying the same alignment strategy to every patient.
The Anterior Hip “Bikini” Incision
Dr. Cooper performs all of his primary hip replacements through the anterior approach and has adopted the bikini incision for most patients.
Unlike the traditional longitudinal incision, the bikini incision follows natural skin tension lines (Langer’s lines), offering:
- Excellent cosmetic appearance
- Reduced wound healing problems
- Lower skin tension
- Preservation of the same underlying muscle-sparing anterior approach
He also explained why experience is essential before adopting this technique, particularly because the bikini incision is less extensile than the traditional approach.
The Patellar Resurfacing Debate
Few topics in knee replacement remain as controversial as patellar resurfacing.
After initially resurfacing every patella, Dr. Cooper experimented with selective non-resurfacing based on published literature.
His personal experience differed significantly from many published studies.
He observed:
- Increased anterior knee pain
- Higher rates of secondary resurfacing
- More dissatisfied patients
Ultimately, he returned to resurfacing essentially all patellas during total knee replacement—a decision mirrored by my own clinical experience.
One-Stage Revision for Infection
Periprosthetic joint infection remains one of the most devastating complications following joint replacement.
Dr. Cooper discussed his current preference for one-stage revision surgery in many patients.
Compared with traditional two-stage treatment, one-stage exchange offers the possibility of:
- Removing infected implants
- Performing an aggressive debridement
- Implanting definitive revision components during the same operation
He also explained why he typically prefers a true one-stage reconstruction over a “one-and-a-half-stage” procedure whenever appropriate.
Physical Therapy After Joint Replacement
One particularly interesting discussion involved postoperative rehabilitation.
For hip replacement, Dr. Cooper delays formal physical therapy for approximately two weeks, allowing early healing before patients decide whether therapy is necessary.
Many patients ultimately recover so well that they elect not to attend formal physical therapy at all.
For knee replacement, he similarly recommends avoiding aggressive therapy during the first two weeks while encouraging:
- Full knee extension
- Early flexion
- Walking
- Avoiding excessive inflammation
The emphasis is on allowing the knee to recover rather than overworking it immediately after surgery.
How Long Will a Joint Replacement Last?
Patients ask this question every day.
Dr. Cooper believes today’s modern implants are likely to last the lifetime of many patients.
With contemporary cementless fixation and highly durable polyethylene bearings, he estimates that many implants may function well for 40–60 years, although continued long-term research is necessary.
Artificial Intelligence in Orthopedic Surgery
Although AI has not yet changed how Dr. Cooper performs surgery, it has already improved clinical workflow.
He currently uses AI-assisted documentation to:
- Improve eye contact during patient visits
- Reduce administrative burden
- Improve efficiency
Like many surgeons, he believes future AI applications in surgery remain promising but still require meaningful clinical validation.
Looking Ahead
Perhaps the most exciting part of our discussion focused on the future.
Dr. Cooper believes joint replacement will continue improving through incremental advances in:
- Implant design
- Robotics
- Pain management
- Surgical technique
- Inflammation control
- Biological fixation
He also discussed exciting research into biologic “living” joint replacements and disease-modifying therapies that may one day change how arthritis itself is treated.
Watch Episode 28
If you’re considering hip or knee replacement—or you’re simply interested in the future of orthopedic surgery—this conversation offers practical insights from one of the country’s leading revision surgeons.
▶️ Watch on YouTube: https://youtu.be/VpG03ZE0aw8
🎧 Search “The Joint Replacement Podcast” wherever you get your podcasts.
References
- Cooper HJ, Sloan M. The Joint Replacement Podcast, Episode 28. Interview transcript.
- American Academy of Orthopaedic Surgeons. Clinical Practice Guidelines and patient education resources on hip and knee replacement.
- American Association of Hip and Knee Surgeons. Evidence-based educational resources on total joint arthroplasty and revision surgery.
- American Joint Replacement Registry. Annual Registry Report and national outcomes data for hip and knee arthroplasty.