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What Is Total Hip Replacement Surgery in Dogs?

What Is Total Hip Replacement Surgery in Dogs?

Total Hip Replacement

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Owners

Learn what total hip replacement surgery in dogs is, why it’s done, candidate requirements, recovery process, risks, and long-term outcomes

By 

Sustainable Vet Group

Updated on

July 17, 2026

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This article is for informational purposes only and is not a substitute for professional veterinary advice. Every case is unique, so always consult your veterinarian for guidance specific to your pet.

This content is intended for veterinary professionals for educational purposes. It does not replace clinical judgment or tailored advice. Always rely on your training, expertise, and the specific context of your patients.

What Is Total Hip Replacement Surgery in Dogs?

Total hip replacement is the gold standard treatment for severe canine hip disease. It's also the most complex and expensive orthopedic procedure your dog might be offered, and it deserves a thorough understanding before you decide.

This guide covers exactly what THR is, how the procedure works, which dogs are suitable candidates, what the implants look like and how they function, and what the research shows about outcomes.

 

Quick answer: Total hip replacement (THR) removes the diseased femoral head and acetabulum and replaces both with prosthetic components: a metal ball and stem fitted into the femur, and a metal cup with a plastic liner fitted into the pelvis. The result is a near-normal mechanical hip joint. Success rates of 90 to 95% are reported consistently across published research. THR is the only surgical option that restores full hip function rather than replacing the joint with a fibrous substitute.

 

Key takeaways

  • THR replaces the entire hip joint with a metal and plastic prosthetic that mimics normal function.
  • 90 to 95% of dogs achieve good-to-excellent function after THR, per Texas A&M Veterinary Medical Teaching Hospital.
  • Cemented and cementless implant systems are both used; no clear advantage for either in long-term function.
  • Skeletal maturity is typically required: most dogs need to be at least 9 to 12 months old.
  • Requires a board-certified surgeon and specialist facility; not available at general practice.
  • The implants are designed to last the dog's lifetime in most cases.

What total hip replacement actually does

The normal hip is a ball-and-socket joint. When this joint is destroyed by disease, the options are to remove the ball (FHO), or to replace both the ball and the socket with prosthetic components (THR).

VCA Animal Hospitals describes it: "Total hip replacement surgery removes and replaces both the ball and socket with prostheses (artificial parts). Most canine hip replacement prostheses have a metal ball at the top of the femur that fits into a dense plastic socket."

Unlike FHO, which eliminates the joint and relies on scar tissue as a substitute, THR creates a new mechanical joint. The dog's bone grows into or onto the implant (in cementless systems) or is secured with bone cement (in cemented systems), and the prosthetic ball moves within the prosthetic socket just as a natural hip would.

Texas A&M Veterinary Medical Teaching Hospital states: "The new hip is designed to allow the joint to move in an identical manner to a normal hip."

The implant systems: cemented vs. cementless

Two main fixation approaches exist for THR implants in dogs.

Cemented total hip replacement

In cemented THR, polymethylmethacrylate (bone cement) is used to anchor both the femoral stem and the acetabular cup to the bone. The cement fills the space between the implant surface and the bone, providing immediate rigid fixation.

Advantage: Excellent immediate stability; allows early controlled weight-bearing.

Disadvantage: Aseptic loosening (the body's response causing the cement interface to fail over time) occurs in 5 to 15% of cemented replacements according to Texas A&M data. Cemented systems have been in use in veterinary medicine since 1976.

Cementless total hip replacement

In cementless (press-fit) THR, the implants are designed with a textured surface (often titanium-coated or porous-coated). The implants are press-fitted precisely into the bone. Over time, the dog's own bone grows into the surface of the implant (osseointegration), producing a biological fixation.

Global Vet Specialists: "Cementless (press-fit) technology utilizes precise initial implantation and in-growth (osteointegration) of bone once the implant is in place."

Advantage: Avoids the long-term aseptic loosening associated with cement; bone growth into the implant creates durable biological fixation.

Disadvantage: Requires precise surgical technique and appropriate bone quality for osseointegration to occur.

VCA Animal Hospitals notes: "There currently appears to be no distinct advantage between cemented versus cementless implants for the total hip replacement." The choice between systems is made by the surgeon based on the dog's anatomy, bone quality, and other individual factors.

Implant materials

  • Femoral stem: titanium alloy or cobalt-chromium
  • Femoral head (ball): cobalt-chromium or ceramic
  • Acetabular cup: metal shell, often titanium-coated for osseointegration in cementless systems
  • Acetabular liner: ultra-high molecular weight polyethylene (dense plastic)

Implant size range

Modern implant systems accommodate a wide range of dog sizes. BioMedtrix (a major veterinary THR implant manufacturer) offers systems for dogs ranging from 3.5 to over 180 pounds. Mini and micro implant systems allow THR in small breeds and even cats.

What the procedure involves

THR is performed under general anesthesia with the dog positioned in lateral recumbency (on its side). The procedure takes 2 to 3 hours in most cases.

Key surgical steps:

  1. Approach: incision over the lateral hip, muscle retraction to access the joint
  2. Hip dislocation: the hip is luxated to expose the femoral head
  3. Femoral head removal: the femoral head and neck are removed (as in FHO)
  4. Acetabular preparation: the cartilage and damaged bone of the socket are reamed to create a precise fit for the acetabular cup
  5. Cup placement: the acetabular cup is inserted (press-fit or cemented) into the prepared socket
  6. Femoral preparation: the medullary canal of the femur is reamed to receive the femoral stem
  7. Stem and head placement: the femoral stem is inserted (press-fit or cemented); the appropriate-size prosthetic head is attached
  8. Reduction: the prosthetic ball is placed into the prosthetic socket; joint stability and range of motion are assessed
  9. Closure: layered closure of muscle, subcutaneous tissue, and skin

Strict aseptic conditions throughout are critical. Any pre-existing infection (skin, urinary, dental) must be resolved before THR is scheduled, because bacterial contamination of an implant can lead to catastrophic complications. Southwest Veterinary Surgical Service confirms: "Blood work and urine testing are performed prior to surgery to screen for infection. If infections are noted, the surgery must be postponed."

Who performs THR

THR requires a board-certified veterinary surgeon (DACVS) with specific THR training and experience. It is not available at most general practices. Dedicated orthopedic surgery centers or veterinary teaching hospitals are the primary settings.

Global Vet Specialists reports performing more than 1,700 THR procedures across their team. The surgeon's experience with the specific implant system used is as important as their general surgical credentials.

When considering THR, ask the surgeon:

  • How many THR procedures have you performed?
  • Which implant system do you use, and why?
  • What is your personal complication rate?

Indications: which conditions lead to THR

The most common indication for THR in dogs is hip dysplasia with established secondary arthritis that causes pain and lameness not adequately controlled by medical management. Other indications include:

  • Femoral head or neck fractures
  • Hip luxation (chronic or irreducible acute)
  • Failed FHO
  • Avascular necrosis (Legg-Calvé-Perthes disease) where THR is feasible
  • Severe end-stage hip arthritis from any cause

Texas A&M notes: "The most frequent indication for total hip replacement in dogs is for pain and lameness caused by severe arthritis secondary to hip dysplasia, followed by fractures and dislocation of the bones that make up the hip joint."

For how THR candidacy is assessed, see how to know if your dog is a candidate.

Published outcomes

The research on THR outcomes in dogs is consistently strong.

Texas A&M Veterinary Medical Teaching Hospital: "Studies have shown that 90 to 95% of dogs have good-to-excellent function following this procedure. Hip replacement provides years of pain-free activity that would otherwise not have been possible."

Southwest Veterinary Surgical Service: "Over 90% of the cases have an excellent outcome."

The BFX stem cementless system study (referenced across multiple outcome reviews) reports more than 97% of dogs regaining normal function.

These outcomes significantly exceed FHO outcomes, particularly in large dogs, which is why THR is the preferred option when feasible.

For the full THR long-term outcome data, see long-term outcomes of THR. For how THR and FHO outcomes compare directly, see FHO as an alternative to THR.

For what recovery from THR looks like and what to expect at home, see recovery expectations after THR. For dogs who aren't suitable THR candidates, see alternatives if THR isn't appropriate.

Complications

THR complications are less common than with FHO but more serious when they occur. Southwest Veterinary Surgical Service: "Although they are not common, complications can be dramatic when they occur and may require additional major surgery to resolve."

Main complications:

  • Hip luxation (prosthetic dislocation): the ball pops out of the socket; requires immediate reduction, sometimes revision surgery
  • Infection: catastrophic if it reaches the implant; may require implant removal
  • Aseptic loosening: mainly with cemented systems; 5 to 15% risk
  • Femur fracture: during or after surgery
  • Sciatic nerve neurapraxia: temporary weakness from nerve stretching during positioning; usually resolves

Overall complication rates across published literature range from 5 to 15%, significantly lower than reported FHO complication rates.

Cost

THR is the most expensive hip surgery option:

  • Per hip: $4,000 to $8,000+ in most US markets; some specialty centers charge $6,000 to $10,000+
  • Bilateral cases: always staged (separate surgeries); total cost is roughly double
  • Post-operative care: additional $500 to $2,000 for rechecks, radiographs, and rehabilitation

For the full cost breakdown and comparison with FHO, see what THR costs.

Frequently asked questions

My dog is 6 months old. Can they have THR?

THR is typically performed once skeletal maturity is reached, usually 9 to 12 months in most breeds and later in giant breeds (up to 18 to 24 months). This ensures the bone is mature enough to support and integrate with the implant. Some exceptions exist, but early THR in immature dogs carries higher risk of complications related to incomplete bone development.

Can a dog who had FHO later receive THR?

Yes, but it's more complex than primary THR. Scar tissue from the FHO, altered bone anatomy, and muscle changes make the procedure technically more demanding. An experienced THR surgeon can often still achieve good results, but it should be discussed openly with the surgeon before proceeding.

Is THR available for small dogs?

Yes. Mini and micro implant systems are now available for small dogs and cats. BioMedtrix offers systems for dogs as small as 3.5 pounds. If your small dog has a condition that would benefit from THR rather than FHO (Legg-Calvé-Perthes, for example, in a dog whose owner wants the best possible function), consult a THR-experienced surgeon about whether small-breed implants are appropriate.

What happens if THR doesn't work?

If a THR fails significantly (implant infection, irreversible loosening), the options include revision THR (replacing the implant) or conversion to FHO (removing the implant and allowing a false joint to form). Both are technically demanding procedures. This is one reason why choosing an experienced surgeon and appropriate candidate selection matter so much from the outset.

Total hip replacement is the most complete solution to canine hip disease. It replaces a failing joint with one that functions normally, and for most dogs, it lasts for the remainder of their life. The cost is real, the recovery is demanding, and it requires a specialist. For the right dog, it is transformative.

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