Total patellectomy in a dog: Long term outcome

Patellectomy alters stifle biomechanics and has been demonstrated to result in degenerative joint lesions and to increase the force required for its extension. A 3-year-old male dog was admitted with right hindlimb lameness due to a penetrating wound in the stifle. After exploratory arthrotomy, diagnosis of straight patellar ligament avulsion and patellar fracture was established. In three months, the dog underwent three surgeries to repair the straight patellar ligament, drainage of the stifle, and total patellectomy. Antimicrobial and anti-inflammatory drugs were administered. Restriction of activity and physiotherapy were also advised. Patellectomy was performed because the patella was no longer adhered to its adjacent soft tissues and appeared to be necrotic. Follow-up information for seven years showed mild lameness in the affected limb and a body attempt to substitute the patella.