Blog
 » 
TPLO
 » 
Can a Dog Re-Tear ACL After TPLO Surgery?

Can a Dog Re-Tear ACL After TPLO Surgery?

TPLO

X min read

Owners

Learn if a dog can re-tear the ACL after TPLO surgery, signs to watch for, and how to prevent re-injury effectively.

By 

Sustainable Vet Group

Updated on

March 9, 2026

.

Can a Dog Re-Tear ACL After TPLO Surgery?

ACL injuries are common in dogs, and TPLO surgery is a popular treatment. But many pet owners wonder: can a dog re-tear the ACL after TPLO surgery? Understanding this risk is important for your dog's recovery and long-term health.

In short, yes, a dog can re-tear the ACL after TPLO surgery, but it is relatively uncommon with proper care. This article explains why re-injury happens, how to recognize it, and what you can do to protect your dog.

What is TPLO surgery and how does it help ACL injuries?

TPLO stands for Tibial Plateau Leveling Osteotomy. It is a surgical procedure designed to stabilize a dog's knee after an ACL rupture. Instead of repairing the torn ligament directly, TPLO changes the knee's mechanics to reduce stress on the ligament.

This surgery allows dogs to regain function and reduces pain. It is considered one of the most effective treatments for ACL injuries in dogs.

  • Procedure purpose: TPLO surgery alters the tibial plateau angle to stabilize the knee without relying on the ACL, improving joint stability.
  • Recovery benefits: Dogs often regain near-normal mobility and experience less arthritis progression after TPLO surgery.
  • Common candidates: Medium to large breed dogs with complete ACL tears are typical candidates for TPLO surgery.
  • Alternative options: Other surgeries like lateral suture technique exist but may have different recovery profiles.

Understanding TPLO helps clarify why re-tearing the ACL is less common but still possible after surgery.

Can a dog re-tear the ACL after TPLO surgery?

Yes, a dog can re-tear the ACL after TPLO surgery, but it is not very common. The surgery stabilizes the knee, reducing strain on the ligament, but it does not make the ligament invincible.

Re-tearing may occur due to trauma, improper healing, or excessive stress during recovery. Some dogs may also develop issues in the opposite leg.

  • Re-injury risk: The risk of re-tearing the ACL after TPLO is low but increases with high-impact activities or accidents.
  • Opposite leg tears: Dogs with one ACL tear are at higher risk of tearing the ACL in the other leg.
  • Healing factors: Incomplete healing or early return to activity can increase re-tear chances.
  • Age and weight impact: Older or overweight dogs may have higher risks of ligament problems post-surgery.

Knowing these risks helps owners take precautions to minimize the chance of re-injury.

What signs indicate a possible ACL re-tear after TPLO surgery?

Recognizing signs of a re-tear early can lead to prompt veterinary care. Watch for changes in your dog's behavior or mobility that suggest knee pain or instability.

Common symptoms include limping, swelling, or reluctance to bear weight on the leg.

  • Limping or lameness: Sudden or worsening limping may indicate a new ACL injury or complication.
  • Knee swelling: Swelling around the knee joint can signal inflammation or injury recurrence.
  • Decreased activity: Reluctance to run, jump, or climb stairs may reflect pain or instability.
  • Abnormal gait: Changes in how your dog walks, such as toe touching or shifting weight, can be warning signs.

If you notice these signs, consult your veterinarian immediately for evaluation.

How can you prevent a dog from re-tearing the ACL after TPLO?

Preventing re-injury involves careful management during recovery and beyond. Following your vet’s instructions closely is crucial to protect your dog’s knee.

Proper rehabilitation and lifestyle adjustments can reduce the risk significantly.

  • Controlled activity: Limit running and jumping during recovery to avoid stressing the knee before healing.
  • Physical therapy: Guided exercises strengthen muscles and improve joint stability post-surgery.
  • Weight management: Keeping your dog at a healthy weight reduces pressure on the knees and ligaments.
  • Regular check-ups: Frequent veterinary visits help monitor healing and catch problems early.

These steps support your dog's long-term knee health and reduce chances of re-tearing the ACL.

What is the typical recovery timeline after TPLO surgery?

Recovery from TPLO surgery usually takes several months. Understanding the timeline helps you set realistic expectations and care plans.

Most dogs gradually return to normal activity with proper rehabilitation and rest.

  • Initial rest phase: The first 6 to 8 weeks require strict rest and limited movement to allow bone healing.
  • Gradual exercise: Controlled leash walks and gentle physical therapy start after initial healing.
  • Full recovery: Most dogs reach full recovery between 3 to 6 months post-surgery.
  • Long-term care: Maintaining muscle strength and joint health continues beyond formal recovery.

Following this timeline helps avoid complications and supports successful outcomes.

What treatments are available if a dog re-tears the ACL after TPLO?

If a dog re-tears the ACL after TPLO surgery, treatment options depend on severity and overall health. Early diagnosis improves treatment success.

Veterinarians may recommend revision surgery or conservative management based on the case.

  • Revision TPLO surgery: A second TPLO may be performed to stabilize the knee again if re-tear occurs.
  • Conservative care: Rest, pain relief, and physical therapy may be options for mild cases or non-surgical candidates.
  • Pain management: Medications help control discomfort during healing or chronic conditions.
  • Supportive devices: Knee braces or slings can provide additional joint support during recovery.

Discuss all options with your veterinarian to choose the best plan for your dog’s needs.

Conclusion

Can a dog re-tear ACL after TPLO surgery? Yes, it is possible but uncommon with proper care and rehabilitation. Understanding the risks and signs helps you protect your dog’s knee health.

Following your veterinarian’s advice on activity restriction, physical therapy, and weight management reduces the chance of re-injury. Early detection and treatment of problems improve outcomes and keep your dog active and comfortable.

FAQs

How common is ACL re-tear after TPLO surgery?

ACL re-tear after TPLO is relatively rare, occurring in a small percentage of cases, especially when post-op care is followed carefully.

Can dogs fully recover after a second TPLO surgery?

Many dogs recover well after revision TPLO surgery, but recovery may be longer and requires careful management.

Is physical therapy necessary after TPLO surgery?

Physical therapy is highly recommended to strengthen muscles and improve joint stability, reducing re-injury risk.

What activities should be avoided after TPLO surgery?

Avoid high-impact activities like running, jumping, and rough play until your vet confirms full recovery.

Can weight affect ACL injury risk in dogs?

Yes, overweight dogs have increased stress on joints, raising the risk of ACL injuries and complications after surgery.

Get a Free Poster

Enhance your workspace with a high-quality radiographs reference poster, designed for veterinary professionals. This free physical poster will be shipped directly to you—just fill out the form to request your copy.

Related posts

Get a Free Poster for Your Clinic

Enhance your workspace with a high-quality radiographs reference poster, designed for veterinary professionals. This free physical poster will be shipped directly to you—just fill out the form to request your copy.

We'd love you to
Join Us!

Enter Your Details Below to Receive Your Information Pack

100% safe & secure. Your details are never shared or sold.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Taking Great TPLO Radiographs

Click Below to Watch Live Video Demos

We'll send you a Free Wall Poster with all the steps

Now that you are a pro at TPLO rads

Let's take your infection control to the next level

Watch these videos!

Step #1

Getting Ready

Ensuring a clean surgical field starts with proper skin preparation. This video demonstrates the best practices for:

  • Shaving the patient – Achieving a close, even shave while minimizing skin irritation
  • The Dirty Scrub – The initial skin prep step to remove surface debris and reduce bacterial load before the sterile scrub.

Following these techniques helps reduce infection risk and improve surgical outcomes. Watch the video to see how it’s done effectively!

Step #2

Reduce Your Risks

Many surgeons are shocked to find out that their patients are not protected from biofilms and resistant bacteria when they use saline and post-op antibiotics.

That’s Where Simini Comes In.

Why leave these risks and unmanaged?  Just apply Simini Protect Lavage for one minute. Biofilms and resistant bacteria can be removed, and you can reduce two significant sources of infection.

Step #3

Take the Course

Preventing surgical infections is critical for patient safety and successful outcomes. This course covers:

  • Aseptic techniques – Best practices to maintain a sterile field.
  • ​Skin prep & draping – Proper methods to minimize contamination.
  • ​Antibiotic stewardship – When and how to use perioperative antibiotics effectively.

Stay up to date with the latest evidence-based protocols. Click the link to start learning and earn CE credits!

Get Your
Free Poster!

Enter your information below, and we’ll ship it to you at no cost.

Do you want to customize it?

How many would you like?

About you

Shipping information

100% safe & secure. Your details are never shared or sold.

We will work on your request shortly.
Oops! Something went wrong while submitting the form.
What’s your role in animal care?

Tell us who you are so we can guide you to the most relevant information.