Short, incomplete fractures of the proximal phalanx in the sport horse

Proximal phalanx (P1) fractures are very common in horses of all ages and uses. These fractures can be difficult to detect when only a small part of the bone is affected, or they can be very complicated with many fragments. A unique feature of P1 fractures is the multitude of possible configurations. Classification is usually based on the results of radiography; however, this does not always provide sufficient detail about the full extent of the fracture. Short incomplete sagittal fractures (SISF) of P1 have a length of less than 30 mm and arise from the midsagittal groove of the proximal articular surface of P1 [1]. This fracture configuration is typically seen in horses used for athletic activities such as racing [1] but also in other disciplines such as showjumping and dressage ...