TPLO: Tibial Plateau Leveling Osteotomy. Think canine version of a torn ACL.
Basically what they do is cut the bone, rotate the tibia 90 degrees, and let it heal. Supposed to be "the fix" for this ailment, but it just sounds so invasive to us.
One link:
When Does My Dog Need TPLO Surgery? | Veterinary Surgical Specialists
Two link:
Tibial Plateau Leveling Osteotomy for Cranial Cruciate Ligament Rupture in Canines: Patient Selection and Reported Outcomes
Sounds really scary to, so I guess I'm just trying to "man up" about this.