TPLO vs TTA:
Which is right
for your dog?
Same problem. Different solutions.
Both TPLO and TTA address the same injury: a torn cranial cruciate ligament (CCL) — the canine equivalent of the human ACL. When the CCL tears, the knee becomes unstable. Every step causes the tibia to slide backward under the femur, grinding on the meniscus and accelerating joint damage.
Neither surgery replaces the ligament. Instead, both procedures modify the joint geometry so the knee is stable under load without a functional CCL. They just achieve that stability differently.
How each procedure works.
Tibial Plateau Leveling Osteotomy
The top surface of the tibia (the tibial plateau) is naturally sloped — typically 25–35°. This slope causes the femur to slide backward when the dog bears weight without an intact CCL.
TPLO corrects this directly: the plateau is cut, rotated to a neutral 0–5°, and secured with a bone plate and screws. Now when the dog lands, the joint is geometrically stable — it doesn't rely on the CCL at all.
Healing is bony rather than soft-tissue, which makes recovery faster and more predictable.
Tibial Tuberosity Advancement
TTA takes a different approach. Rather than changing the plateau angle, it moves the tibial tuberosity (the bony prominence at the front of the tibia where the patellar tendon attaches) forward.
This repositions the patellar tendon so it acts perpendicular to the tibial plateau during weight-bearing — neutralizing the instability without rotating the bone.
TTA works best when the tibial plateau angle is already relatively low (typically below 25°). In high-angle cases, it may not fully neutralize instability.
Side-by-side comparison.
The table below reflects the current published literature and high-volume surgical experience.
Cuts and rotates the tibial plateau to 0–5°, secured with a plate and screws. Eliminates joint instability geometrically.
Advances the tibial tuberosity forward to change the patellar tendon angle, stabilizing the joint through force vectors.
Most dogs with CCL tears regardless of size or tibial plateau angle. Preferred for large breeds, active dogs, and plateau angles above 25°.
Dogs with lower tibial plateau angles (typically below 25°). Less commonly used; surgeon preference varies.
~95% return to previous function. Supported by 25+ years of clinical evidence across thousands of cases.
Reported rates of 85–90% in peer-reviewed literature. Fewer long-term comparative studies than TPLO.
8 weeks restricted activity. Most dogs bear weight within days. Radiographic clearance at 8-week recheck.
8 weeks restricted activity. Similar weight-bearing timeline. Bone healing confirmed radiographically.
Titanium or stainless steel bone plate and screws. Hardware is typically left in place permanently.
Titanium cage, fork, and pin system. Hardware remains in place unless complications arise.
At WMVO: $3,950 flat fee per leg, all-inclusive. Referral hospitals may charge $4,500–$6,500+.
Generally comparable to TPLO. Varies by practice and implant system used.
Introduced in 1993. Extensive peer-reviewed literature. Dominant technique at high-volume orthopedic practices.
Introduced in 2004. Fewer long-term studies. Used in select practices as an alternative to TPLO.
Why TPLO became the standard.
Broader applicability
TPLO works regardless of the tibial plateau angle and is effective across all sizes and breeds. TTA is most effective in a narrower range of cases — dogs with lower plateau angles. For the majority of CCL patients, TPLO is the more appropriate choice.
Longer evidence record
TPLO was introduced in 1993 and has 30+ years of peer-reviewed outcomes data behind it. TTA was introduced in 2004. When choosing between two procedures, the one with the deeper clinical literature carries less uncertainty.
High-volume surgeon advantage
The best predictor of surgical outcome isn't the procedure — it's the surgeon's volume and experience with that procedure. Dr. Smith performs TPLO exclusively as his primary CCL technique, with 1,000+ cases performed. Consistency and repetition matter when you're cutting bone.
Post-op simplicity
TPLO recovery is well-characterized: restricted activity for 8 weeks, radiograph at week 8, return to normal activity for 95% of dogs. Owners and referring vets know exactly what to expect at each milestone.
Common questions.
Is TPLO better than TTA for dogs?
For most dogs, yes. TPLO has a stronger evidence base, works across a wider range of anatomy, and is the dominant technique at high-volume orthopedic practices. TTA can be appropriate in select cases, but TPLO is the standard for good reason.
How long is recovery after TPLO vs TTA?
Both procedures require 8 weeks of restricted activity. Most dogs are bearing weight within a few days of either surgery. Return to full activity is confirmed by radiograph at the 8-week recheck.
Does WMVO perform TTA surgery?
WMVO performs TPLO as the primary technique for CCL repair. Dr. Smith will evaluate your dog's specific anatomy and discuss the most appropriate approach at your consultation.
Which surgery has a higher success rate?
Both procedures report high return-to-function rates. TPLO is backed by a larger and longer body of clinical evidence. In practice, surgical volume and surgeon experience are stronger predictors of outcome than procedure choice.
For more frequently asked questions about TPLO, see our full FAQ page.
Talk to Dr. Smith about your dog's knee.
The right procedure depends on your dog's specific anatomy, size, and activity level. Call us — Dr. Smith will give you a straight answer, not a sales pitch.