TPLO vs lateral suture for a torn ACL in dogs
Two common surgeries for a torn cranial cruciate ligament (the dog version of the ACL): how they work, who they suit, recovery and cost.
Last updated: October 2026 · 4 sources · see sources
Side by side
| TPLO | Lateral suture | |
|---|---|---|
| What the surgeon does | Makes a curved cut at the top of the shin bone, rotates it to level the joint surface, and holds it with a plate and screws. [1] | Places heavy suture outside the joint where the ligament used to be. It steadies the knee while scar tissue forms around it. [1] |
| Often chosen for | Many surgeons prefer bone-cut techniques like TPLO for large, active dogs, and some use them for small dogs too. [1] | It is often less costly, but ACVS notes it may not be the best choice for larger and younger dogs because of arthritis later on. [1] |
| Most common problems | Infection, implant problems, bone fracture, meniscal tear and arthritis are possible after any cruciate surgery. [1] | ACVS says the most common complications are suture failure and arthritis. [1] |
| Recovery | Several weeks of confinement while the bone heals, then a slow return to activity. [1] | Several weeks of restricted activity while scar tissue forms. [1] |
| Typical cost | $3,700–$4,350 on owner bills [2] $2,500–$6,000 [4] | $1,000–$2,500 [4] Two clinic examples: $2,250 and $4,200 [3] |
Why the knee needs fixing
The cranial cruciate ligament keeps the knee from sliding back and forth. Most tears come from slow wear on the ligament, not one bad jump. Partial tears almost always become full tears. [1]
Surgery is the only way to permanently control the wobble in the knee. With surgery, ACVS reports significant improvement in 85 to 90 percent of cases. [1]
Other options
Your surgeon may mention TTA, another bone-cut surgery, or a TightRope, a stronger suture-based method. Some dogs are managed without surgery through strict rest, pain medicine and rehab. [1]
Common questions
Is TPLO better than lateral suture?
Not for every dog. ACVS says many surgeons prefer TPLO for large, active dogs because outcomes are consistent, while lateral suture is often less costly but may not suit larger and younger dogs. Your surgeon will look at your dog's size, age, activity and knee shape.
How much does TPLO cost compared with lateral suture?
Owner bills for TPLO typically run $3,700–$4,350 (VetReceipt). Lateral suture is often quoted around $1,000–$2,500 (Vety), though prices vary widely by clinic.
Will my dog tear the other knee?
It happens often. ACVS says up to half of dogs with cruciate disease in one knee develop it in the other, usually within 12 to 18 months.
Can a torn cruciate heal without surgery?
Some dogs are managed with strict rest, pain medicine and rehab. ACVS says surgery is the only way to permanently control the knee's instability, and the knee stays prone to reinjury without it.
Related
This page is general information for planning, not veterinary advice. Talk to your vet about your own pet.