Two adult warmblood horses with a history of chronic hind limb lameness originating fromthe proximal interphalangeal joint (PIPJ) were presented at the equine hospital De Bosdreef(Belgium) between 2016 and 2017. Based on the case history and orthopedic examination, chronicosteoarthrosis (OA) of the PIPJ was diagnosed in both horses. A modified surgical arthrodesisof the PIPJ was performed using a central dorsal three-hole proximal interphalangeal lockingcompression plate (PIP plate) and four 5.5 mm transarticular cortical screws placed in a lagfashion (TCS-LF). The procedure resulted in an early bone bridging of the PIPJ and a return ofthe horses to the intended use within ten months after the surgery.