Fractures of the lateral malleolus of the tibia in 16 horses.

The research article studies the clinical and radiological characteristics of 16 horses that had fractures in the lateral malleolus of the tibia. The paper records the surgical techniques applied, reports on the results, and discusses the reasoning for the removal of the fractures. Post-operation, horses returned to work six months after surgery with 15 of them showing no signs of lameness during a follow-up period of 17-62 months.

Research Overview

The research investigates the physical and radiological signs of horses that experienced fractures in the lateral malleolus of the tibia, a part of the animal’s lower leg.

• The history of the 16 horses included a known traumatic incident in 14 cases.
• All animals exhibited a tarsocrural joint effusion, a condition characterized by increased intra-articular fluid, often a sign of injury or disease.
• In ten cases, there was palpable thickening of the lateral collateral ligaments and crepitus, which is a grating sound or sensation produced by friction between bone and cartilage or the fractured parts of a bone.

Fracture Characteristics and Surgical Approach

The researchers used radiographs to identify and characterize the fractures.

• The fracture was identified in all dorsoplantar (from top to bottom) and 14 out of 18 dorsomedial-plantarolateral oblique (diagonal) radiographic projections.
• Nine fractures were simple, meaning they had a single, well-defined crack, and nine were comminuted, meaning they were broken into several pieces.
• In relation to their location, there was no left:right disparity. Meaning that the fractures didn’t favour any particular side more.
• Most fractures were unilateral (14 cases), occurring on only one side of the body, while two were bilateral, occurring on both sides.

The researchers performed a surgical procedure known as tarsocrural arthrotomy to remove all fractures.

• The surgical approaches were dorsolateral (on the top and outside) in 14 joints, plantarolateral (on the bottom and outside) in 3 joints, and both dorsolateral and plantarolateral in 1 joint. The location of the fracture dictated the approach taken.

Post-surgical Results and Follow-up

Post-surgery, the horses underwent an ascending exercise programme and returned to work after six months.

• During the follow-up period of 17-62 months, 15 of the 16 horses were free of lameness, the inability to use one or more limbs effectively. In other words, they fully regained their mobility.
• Out of these 15, 13 horses performed at a level similar to their pre-injury standard, suggesting a successful recovery and return to their normal routine.