A composite absorbable implant used to treat subchondral bone cysts in 38 horses.

BACKGROUND: In the last 30 years, several treatments have been proposed to treat subchondral cystic lesions (SCLs) but there have been no randomised studies to compare different methods and there is no consensus as to the optimal treatment. OBJECTIVES: To evaluate a biocompatible absorbable implant for the treatment of SCLs in young horses in different anatomical locations. STUDY DESIGN: Retrospective case series. METHODS: Horses with SCLs were treated with debridement through a trans-cortical extra-articular approach and an absorbable implant was inserted in the cavity. Clinical and radiographic follow-up was recorded and follow up ranged from 28 to 46 months (mean 37 months). Racing records were reviewed. RESULTS: Thirty-eight horses between 10 and 24 months of age were included in the study. In 36 of 38 horses treated, lameness resolved, and 77% average filling of the cyst was measured 120 days after surgery on radiographs. In two cases, surgical complications were recorded. MAIN LIMITATIONS: Information about the resorption of the implant is not available. Radiographs were performed in various hospitals or at farms or training stables, therefore, possible minor variations in technique and positioning occurred. CONCLUSIONS: The extra-articular approach to the SCLs followed by the insertion of the absorbable implant led to clinical and radiographic improvement of the SCLs at 120 days after surgery. This technique, feasible in different anatomical locations, may offer an alternative to treat SCLs in young horses.

Surgical Repair of a Unicortical Condylar Fracture in a Thoroughbred Racehorse Using a Bioabsorbable Screw.

Surgical repair of unicortical fractures of the distal condyles of the third metacarpal/metatarsal bones (MCIII/MTIII) has been described. In the present case, a bioabsorbable screw was used to stabilize a unicortical fracture in the palmar aspect of the medial condyle of MCIII in a National Hunt Thoroughbred racehorse. The clinical, radiographic, and magnetic resonance imaging findings before and after surgery were recorded. Eighteen weeks after surgery, the lameness had resolved and the bone surrounding the fracture had recovered its normal architecture. One year after surgery, the horse was in training, showed no recurrence of the primary lesion and was considered a "racing prospect" by the trainer. The use of a bioabsorbable screw in this case was associated with a successful outcome and is worthy of further investigation.