Revision (Redo) Total Knee/Hip Replacement is one of the hardest and most stressful orthopedic surgeries.
As a surgeon who, in (2025–2026), has performed more than one hundred and twenty knee and hip revisions, and who sees patients who are terrified every week, I understand exactly what patients wish they had known before the day of surgery. These ten points are my real checklist for every revision patient. If you ignore even one of them, you may end up regretting it.
Tip 1: Revision is not a “second” surgery—it is a completely different operation
Surgery time: two and a half to five hours (vs. forty-five to ninety minutes for the first surgery)
Blood loss: usually eight hundred to two thousand five hundred cc (about two to five times the first operation)
Chance of needing a blood transfusion: over sixty percent
Hospital stay: five to ten days (even in the best hospitals)
Full rehabilitation: six to eighteen months
Before the surgery, promise yourself: be patient—this is a marathon, not a sprint.
Tip 2: A revision surgeon ≠ a routine joint replacement surgeon
Surgeons who do twenty to three hundred primary joint replacements per year are not necessarily experts in revision.
In Iran in 2025, only about twenty-five to thirty surgeons are truly “revision super-specialists” (i.e., they perform at least fifty to seventy revision cases per year). Before the visit, ask the secretary:
“How many revision surgeries has the doctor done in the last twelve months?”
If the answer is below forty, go elsewhere.
Tip 3: Infection must be ruled out (even if you think it isn’t)
In 2025, more than thirty-five percent of the revisions I performed ultimately had late-onset infection that was not detected by routine tests. Be sure to request:
- Alpha-Defensin or Leukocyte Esterase
- Joint fluid culture (aspiration) at least two weeks before surgery
- If suspicion persists: frozen biopsy during the operation
Undiagnosed infection = a complete disaster.
Tip 4: Revision implants are three to six times more expensive
Approximate prices of revision-specific prostheses in 2025 (in million toman):
- Zimmer LCCK or NexGen RHK: three hundred twenty to four hundred eighty million
- Depuy S-ROM or Sigma TC3: three hundred fifty to five hundred twenty million
- Stryker TS or GMRS: four hundred to six hundred fifty million
- Tantalum + long stem + augments: up to nine hundred fifty million
Most supplementary insurance policies usually cover only about fifty to one hundred twenty million. The rest is out of pocket.
Tip 5: Don’t underestimate bone loss
In seventy percent of revisions, the bone is severely eaten away. You will probably need one of the following:
- Metal augments (wedges, blocks, cones)
- Tantalum (Trabecular Metal)
- Large allograft (dead femoral head or tibia)
- Custom three-dimensional printed prostheses (in very severe cases)
Each option has its own cost and risk.
Tip 6: Take the possibility of a two-stage surgery very seriously
If infection is confirmed, the previous prosthesis is completely removed, an antibiotic spacer is placed, you take three to six months of intravenous antibiotics, and then the second stage is done. In 2025, about twenty-two percent of my patients were forced to undergo a two-stage revision. That means:
- Six to twelve months walking with a spacer (with a cane or walker)
- Double the cost
- Two general anesthetics
Tip 7: Revision rehabilitation is much tougher
After the first operation, around week six you typically walk without a cane.
After revision:
- Six to twelve weeks with a walker or two underarm crutches
- Bending the knee up to ninety degrees may take four to six months
- Strengthening the quadriceps can take up to eighteen months
Find a physiotherapist experienced in revision rehab—not a standard general physiotherapist.
Tip 8: Pain after revision for six to twelve months is normal
More than eighty-five percent of patients have moderate to severe pain up to six months.
It takes a full one year for pain to reach an acceptable level. If your surgeon tells you, “Pain will be like the first surgery,” don’t believe it.
Tip 9: The risk of serious complications is four to eight times higher than the first surgery
Real statistics in my center in 2025:
- Recurrent infection: eight to fifteen percent
- Deep vein thrombosis (DVT): twelve percent
- Intraoperative fracture: seven percent
- Prosthesis dislocation: five to eighteen percent (especially in hinged prostheses)
- Need for a third surgery in the next five years: twenty to thirty percent
Tip 10: Get a second—and even third—opinion (really!)
I tell my own patients:
“If I tell you that you need a revision, you must get opinions from two other revision surgeons.”
Sometimes, with advanced PRP injections, advanced hyaluronic gel, or even replacing only the polyethylene component, you can postpone surgery by three to seven years.
Final checklist before signing the consent form
- At least two revision super-specialists have examined you
- Infection has been ruled out one hundred percent
- CT scan or MRI has been performed with a Metal Artifact Reduction protocol
- You have obtained, in writing, the exact cost of implant + hospital + anesthesia
- You have coordinated with an experienced revision physiotherapist for after surgery
- You have planned at least three months of leave or remote work
- You have someone who can stay with you at nights for at least two to three months
Final words
Revision is not the end of the world, but it is a very difficult beginning.
If you enter it with open eyes and full awareness, the final result can even be better than the first prosthesis (because the technology in 2025–2026 is incredibly advanced). But if you rush and ignore these ten tips, you may become one of the fifteen to twenty percent patients who end up regretting their decision for the rest of their lives.