Osteossíntese com haste bloqueada (“interlocking nail”) como tratamento de fratura do terceiro metatarso após artrodese metatarsofângica com haste intramedular modificada em equino / Osteosynthesis with blocked nail (“interlocking nail”) as a treatment for fracture of the third metatarsal after metatarsophalangeal arthrodesis with modified intramedullary nail in equine

Background: The metacarpal/metatarsophalangeal joints, as well as the suspensory apparatus, are usually affected by injuries, due to the intense physical demand during sports and great range of motion, predisposing to degenerative processes,trauma and rupture of the suspensory apparatus. In this case, arthrodesis is the main technique indicated. Such surgicaltechniques have a poor prognosis due to post-surgical complications, such as implant infection. Therefore, the study ofprocedures that promote better joint stabilization is important, with reduced surgical time and tissue exposure, decreasingsignificantly the chance of infection and other possible complications.Case: A 5-year-old male horse was referred to the hospital with a history of trauma and a lacerating wound in the metatarsalplantar region of the left hindlimb. The animal presented grade IV (I-V) claudication of the left hindlimb with hyperextension of the metatarsophalangeal joint and significant pain on palpation, evidencing the rupture of the superficial, deep digitalflexor tendons and suspensory ligament of the fetlock. The initial surgical treatment was performed using the arthrodesistechnique described by [16]. The intramedullary nail was used with fixation of the plate on the plantar face of the first phalanx together with a single plate fused to the pin, adjusted according to size of the first phalanx, 13 mm thick x 15 cm long,forming an angle between 120º and 140º. Twenty-four h after surgery, there was a simple spiral diaphyseal fracture (typeA), in the middle third of the third metatarsal bone in the region of the proximal end, due to the lever held by the short nailagainst the diaphysis cortex. To treat the complication, an intramedullary 316 L surgical steel rod 13 mm thick x 21 cm longwas used, filling the entire spinal canal. The nail had three holes at the proximal end and two holes at the distal end...

Osteossíntese com haste bloqueada (“interlocking nail”) como tratamento de fratura do terceiro metatarso após artrodese metatarsofângica com haste intramedular modificada em equino / Osteosynthesis with blocked nail (“interlocking nail”) as a treatment for fracture of the third metatarsal after metatarsophalangeal arthrodesis with modified intramedullary nail in equine

Background: The metacarpal/metatarsophalangeal joints, as well as the suspensory apparatus, are usually affected by injuries, due to the intense physical demand during sports and great range of motion, predisposing to degenerative processes,trauma and rupture of the suspensory apparatus. In this case, arthrodesis is the main technique indicated. Such surgicaltechniques have a poor prognosis due to post-surgical complications, such as implant infection. Therefore, the study ofprocedures that promote better joint stabilization is important, with reduced surgical time and tissue exposure, decreasingsignificantly the chance of infection and other possible complications.Case: A 5-year-old male horse was referred to the hospital with a history of trauma and a lacerating wound in the metatarsalplantar region of the left hindlimb. The animal presented grade IV (I-V) claudication of the left hindlimb with hyperextension of the metatarsophalangeal joint and significant pain on palpation, evidencing the rupture of the superficial, deep digitalflexor tendons and suspensory ligament of the fetlock. The initial surgical treatment was performed using the arthrodesistechnique described by [16]. The intramedullary nail was used with fixation of the plate on the plantar face of the first phalanx together with a single plate fused to the pin, adjusted according to size of the first phalanx, 13 mm thick x 15 cm long,forming an angle between 120º and 140º. Twenty-four h after surgery, there was a simple spiral diaphyseal fracture (typeA), in the middle third of the third metatarsal bone in the region of the proximal end, due to the lever held by the short nailagainst the diaphysis cortex. To treat the complication, an intramedullary 316 L surgical steel rod 13 mm thick x 21 cm longwas used, filling the entire spinal canal. The nail had three holes at the proximal end and two holes at the distal end...(AU)

Artrodese metatarsofalângica por meio da técnica do cesto de aço modificada em potro / Metatarsophalangeal arthrodesis through the modified steel basket technique in foal

Background: The metacarpophalangeal and metatarsophalangeal joints are very demanded during high intensity exercises,and may be affected by osteoarthritis, fractures, luxations and rupture of the suspensory apparatus. Thus, arthrodesis maybe indicated to restore joint stability and accelerate the ankylosis process. The most commonly used surgical techniqueshave been associated with postoperative complications, including infection and failure of the implants, so it is importantto develop procedures that are less invasive procedures and promoting stable fixation. Therefore, the aim of this work isto report the use of the modified steel basket technique for metatarsophalangeal arthrodesis in a foal with hyperextensionof the joint due to rupture of the digital flexor muscles.Case: A 2-day-old male foal was admitted to clinical care, presenting multiple cutaneous wounds caused by dogs bites,located in the tarsus and thigh of the hindlimb. The animal presented in standing position and had no difficulty of movement,being initially treated through daily cleaning of the cutaneous wounds and systemic antibiotic therapy. Hyperextension ofthe metatarsophalangeal joint was evidenced after 20 days, being approached through tenotomy and tendon shortening,followed by tenorrhaphy and immobilization for 30 days. Due to the failure of the treatment, it was opted for metatarsophalangeal arthrodesis by modified steel basket technique. The procedure involved the implantation of a steel basket of25.0 mm in diameter x 25.0 mm long in a 24.0 mm hole created on the dorsal surface between the third metacarpal andthe proximal phalanx. The basket was filled with bone extracted from drilling and fixed with two cortical screws at anangle of 25° toward proximoplantar and distoplantar direction. Immobilization of the limb was performed postoperativelywith synthetic plaster cast for 45 days and, due to the persistence of lameness...

Artrodese metatarsofalângica por meio da técnica do cesto de aço modificada em potro / Metatarsophalangeal arthrodesis through the modified steel basket technique in foal

Background: The metacarpophalangeal and metatarsophalangeal joints are very demanded during high intensity exercises,and may be affected by osteoarthritis, fractures, luxations and rupture of the suspensory apparatus. Thus, arthrodesis maybe indicated to restore joint stability and accelerate the ankylosis process. The most commonly used surgical techniqueshave been associated with postoperative complications, including infection and failure of the implants, so it is importantto develop procedures that are less invasive procedures and promoting stable fixation. Therefore, the aim of this work isto report the use of the modified steel basket technique for metatarsophalangeal arthrodesis in a foal with hyperextensionof the joint due to rupture of the digital flexor muscles.Case: A 2-day-old male foal was admitted to clinical care, presenting multiple cutaneous wounds caused by dogs bites,located in the tarsus and thigh of the hindlimb. The animal presented in standing position and had no difficulty of movement,being initially treated through daily cleaning of the cutaneous wounds and systemic antibiotic therapy. Hyperextension ofthe metatarsophalangeal joint was evidenced after 20 days, being approached through tenotomy and tendon shortening,followed by tenorrhaphy and immobilization for 30 days. Due to the failure of the treatment, it was opted for metatarsophalangeal arthrodesis by modified steel basket technique. The procedure involved the implantation of a steel basket of25.0 mm in diameter x 25.0 mm long in a 24.0 mm hole created on the dorsal surface between the third metacarpal andthe proximal phalanx. The basket was filled with bone extracted from drilling and fixed with two cortical screws at anangle of 25° toward proximoplantar and distoplantar direction. Immobilization of the limb was performed postoperativelywith synthetic plaster cast for 45 days and, due to the persistence of lameness...(AU)