Tarsometatarsal partial arthrodesis with use of circular skeletal fixator on a dog / Artrodese parcial tarsometatársica com uso de fixador esquéletico externo circular em cão

Background: Trauma to the canine foot may result in injury to soft tissue or bone or both. Foot injury often results in fractures and joint instability because of disruption to carpal or tarsal ligaments. Several fi xation methods have been described for stabilizing tarsometatarsal arthrodesis. The aim of this paper is to report the case of a unilateral tarsometatarsal arthrodesis with use of circular skeletal fi xator on the left pelvic limb of a dog.Case: A 5-year-old intact male dog weighting 25 kg was referred to the veterinary hospital with a left tarsal degloving injury. The previous history revealed that the dog had been bitten by another dog seven days prior to the referral. On physical exam it had swelling and severe pain on the left foot, crepitus of the intertarsal/tarsometatarsal region, instability, bone exposure and myiasis larvae on the wound. The dog was non-weight-bearing on the affected limb. No other abnormalities were found. Radiographs revealed it to be an open fracture of the left tarsal distal line with tarsometatarsal luxation. Adherent dressings were changed for seven days to minimize the contamination before surgery. The dog was treated by open reduction and internal fixation using a circular skeletal fixator. After general anesthesia was induced, a lateral approach to the tarsometatarsal joint was made. The tarsometatarsal joint then was exposed. Arti

Background: Trauma to the canine foot may result in injury to soft tissue or bone or both. Foot injury often results in fractures and joint instability because of disruption to carpal or tarsal ligaments. Several fi xation methods have been described for stabilizing tarsometatarsal arthrodesis. The aim of this paper is to report the case of a unilateral tarsometatarsal arthrodesis with use of circular skeletal fi xator on the left pelvic limb of a dog.Case: A 5-year-old intact male dog weighting 25 kg was referred to the veterinary hospital with a left tarsal degloving injury. The previous history revealed that the dog had been bitten by another dog seven days prior to the referral. On physical exam it had swelling and severe pain on the left foot, crepitus of the intertarsal/tarsometatarsal region, instability, bone exposure and myiasis larvae on the wound. The dog was non-weight-bearing on the affected limb. No other abnormalities were found. Radiographs revealed it to be an open fracture of the left tarsal distal line with tarsometatarsal luxation. Adherent dressings were changed for seven days to minimize the contamination before surgery. The dog was treated by open reduction and internal fixation using a circular skeletal fixator. After general anesthesia was induced, a lateral approach to the tarsometatarsal joint was made. The tarsometatarsal joint then was exposed. Arti

Biomechanical analysis in the use of different cement layers in a new model of modular diaphyseal femoral implant relative to torsion forces / Estudo biomecânico do comportamento de diferentes espessuras de capa de cimento ósseo em novo modelo de prótese modular diafisária femoral em cão submetidas a ensaio de torção

Background: The feasibility of modular cemented prosthesis in the femoral diaphysis was demonstrated in dogs, but several authors report loosening of bone-cement-implant interface as a major complication and have yet to reach a consensus on the ideal cement layer thickness for reducing postoperative morbidity. The objective of this study was to evaluate the stabilization of the prosthesis using different thicknesses of cement layer, subjected to torsion forces. Materials, Methods & Results: For this study 48 femurs from 24 dogs weighing over 15 kg were used. The animals used did not have any prior diagnosis of bone or nutritional diseases, which was an exclusion criteria for this study. All biological materials were obtained immediately after death or euthanasia of the animal, and then subjected to conventional storage in a freezer at a temperature of - 24C. The prosthesis was composed of a cylindrical part with rods for attachment to the intramedullary canal, made of alloy steel 316L. After thawing the femurs and subsequent stabilization at room temperature we performed osteotomies of the femoral diaphysis with an oscillating saw and the installation of the prosthesis. As preparatory measures for prosthesis fixation with cement, the intramedullary canals were cleaned, washed with saline and aspirated. They were separated in four groups, the first group with eight femurs u

O fêmur canino é submetido a uma grande carga excêntrica durante a sustentação de peso e deambulação, sendo que suas propriedades biomecânicas afetam diretamente a forma como se comportam em relação às forças a que são submetidos no animal vivo. [...]

Fratura proximal de tíbia após cirurgia extracapsular para correção de ruptura de ligamento cruzado cranial em cão

Cranial cruciate ligament rupture (CCLR) is one of the most common orthopedic diseases in dogs and extracapsular suture with nylon is often used for its correction. This technique may be associated with incisional complications, post-surgical meniscus injury, swelling associated with suture material and infection. The objective of this study is to report a tibial fracture in a dog, caused by complications after an extracapsular suture for the repair of CCLR. An adult dog, which suffered a tibial fracture after an extracapsular fixation for a CCLR, underwent surgery for the fixation of the fracture with a 2.0mm plate, by a referring veterinarian, but the implant failed. The plate was removed and the fracture was stabilized with a circular fixator. Bone consolidation was observed after 120 days.

Ruptura de ligamento cruzado cranial (RLCCr) é a afecção ortopédica mais frequente no joelho de cães e a sutura fabelo-tibial é frequentemente utilizada na sua correção. Essa técnica pode estar associada com complicações incisionais, lesão tardia de menisco, edema associado ao material de sutura e infecção. O objetivo desta nota foi relatar a ocorrência de fratura proximal de tíbia em um cão, causada por complicação em sutura fabelo-tibial para correção de RLCCr. Um canino atendido em outro serviço foi submetido à osteossíntese com placa 2,0mm para correção de complicação em técnica extra-capsular, na qual houve fratura da tíbia na região do orifício criado para confecção da sutura fabelo-tibial. Houve falha dos implantes e a placa foi removida. A fratura foi estabilizada com fixador esquelético externo circular, sendo constatada, após 120 dias, consolidação.

Fratura proximal de tíbia após cirurgia extracapsular para correção de ruptura de ligamento cruzado cranial em cão

Cranial cruciate ligament rupture (CCLR) is one of the most common orthopedic diseases in dogs and extracapsular suture with nylon is often used for its correction. This technique may be associated with incisional complications, post-surgical meniscus injury, swelling associated with suture material and infection. The objective of this study is to report a tibial fracture in a dog, caused by complications after an extracapsular suture for the repair of CCLR. An adult dog, which suffered a tibial fracture after an extracapsular fixation for a CCLR, underwent surgery for the fixation of the fracture with a 2.0mm plate, by a referring veterinarian, but the implant failed. The plate was removed and the fracture was stabilized with a circular fixator. Bone consolidation was observed after 120 days.

Ruptura de ligamento cruzado cranial (RLCCr) é a afecção ortopédica mais frequente no joelho de cães e a sutura fabelo-tibial é frequentemente utilizada na sua correção. Essa técnica pode estar associada com complicações incisionais, lesão tardia de menisco, edema associado ao material de sutura e infecção. O objetivo desta nota foi relatar a ocorrência de fratura proximal de tíbia em um cão, causada por complicação em sutura fabelo-tibial para correção de RLCCr. Um canino atendido em outro serviço foi submetido à osteossíntese com placa 2,0mm para correção de complicação em técnica extra-capsular, na qual houve fratura da tíbia na região do orifício criado para confecção da sutura fabelo-tibial. Houve falha dos implantes e a placa foi removida. A fratura foi estabilizada com fixador esquelético externo circular, sendo constatada, após 120 dias, consolidação.

Fratura proximal de tíbia após cirurgia extracapsular para correção de ruptura de ligamento cruzado cranial em cão

Cranial cruciate ligament rupture (CCLR) is one of the most common orthopedic diseases in dogs and extracapsular suture with nylon is often used for its correction. This technique may be associated with incisional complications, post-surgical meniscus injury, swelling associated with suture material and infection. The objective of this study is to report a tibial fracture in a dog, caused by complications after an extracapsular suture for the repair of CCLR. An adult dog, which suffered a tibial fracture after an extracapsular fixation for a CCLR, underwent surgery for the fixation of the fracture with a 2.0mm plate, by a referring veterinarian, but the implant failed. The plate was removed and the fracture was stabilized with a circular fixator. Bone consolidation was observed after 120 days.

Ruptura de ligamento cruzado cranial (RLCCr) é a afecção ortopédica mais frequente no joelho de cães e a sutura fabelo-tibial é frequentemente utilizada na sua correção. Essa técnica pode estar associada com complicações incisionais, lesão tardia de menisco, edema associado ao material de sutura e infecção. O objetivo desta nota foi relatar a ocorrência de fratura proximal de tíbia em um cão, causada por complicação em sutura fabelo-tibial para correção de RLCCr. Um canino atendido em outro serviço foi submetido à osteossíntese com placa 2,0mm para correção de complicação em técnica extra-capsular, na qual houve fratura da tíbia na região do orifício criado para confecção da sutura fabelo-tibial. Houve falha dos implantes e a placa foi removida. A fratura foi estabilizada com fixador esquelético externo circular, sendo constatada, após 120 dias, consolidação.

Biomechanical analysis in the use of different cement layers in a new model of modular diaphyseal femoral implant relative to torsion forces / Estudo biomecânico do comportamento de diferentes espessuras de capa de cimento ósseo em novo modelo de prótese modular diafisária femoral em cão submetidas a ensaio de torção

Background: The feasibility of modular cemented prosthesis in the femoral diaphysis was demonstrated in dogs, but several authors report loosening of bone-cement-implant interface as a major complication and have yet to reach a consensus on the ideal cement layer thickness for reducing postoperative morbidity. The objective of this study was to evaluate the stabilization of the prosthesis using different thicknesses of cement layer, subjected to torsion forces. Materials, Methods & Results: For this study 48 femurs from 24 dogs weighing over 15 kg were used. The animals used did not have any prior diagnosis of bone or nutritional diseases, which was an exclusion criteria for this study. All biological materials were obtained immediately after death or euthanasia of the animal, and then subjected to conventional storage in a freezer at a temperature of - 24C. The prosthesis was composed of a cylindrical part with rods for attachment to the intramedullary canal, made of alloy steel 316L. After thawing the femurs and subsequent stabilization at room temperature we performed osteotomies of the femoral diaphysis with an oscillating saw and the installation of the prosthesis. As preparatory measures for prosthesis fixation with cement, the intramedullary canals were cleaned, washed with saline and aspirated. They were separated in four groups, the first group with eight femurs u

O fêmur canino é submetido a uma grande carga excêntrica durante a sustentação de peso e deambulação, sendo que suas propriedades biomecânicas afetam diretamente a forma como se comportam em relação às forças a que são submetidos no animal vivo. [...]

Tarsometatarsal partial arthrodesis with use of circular skeletal fixator on a dog / Artrodese parcial tarsometatársica com uso de fixador esquéletico externo circular em cão

Background: Trauma to the canine foot may result in injury to soft tissue or bone or both. Foot injury often results in fractures and joint instability because of disruption to carpal or tarsal ligaments. Several fi xation methods have been described for stabilizing tarsometatarsal arthrodesis. The aim of this paper is to report the case of a unilateral tarsometatarsal arthrodesis with use of circular skeletal fi xator on the left pelvic limb of a dog.Case: A 5-year-old intact male dog weighting 25 kg was referred to the veterinary hospital with a left tarsal degloving injury. The previous history revealed that the dog had been bitten by another dog seven days prior to the referral. On physical exam it had swelling and severe pain on the left foot, crepitus of the intertarsal/tarsometatarsal region, instability, bone exposure and myiasis larvae on the wound. The dog was non-weight-bearing on the affected limb. No other abnormalities were found. Radiographs revealed it to be an open fracture of the left tarsal distal line with tarsometatarsal luxation. Adherent dressings were changed for seven days to minimize the contamination before surgery. The dog was treated by open reduction and internal fixation using a circular skeletal fixator. After general anesthesia was induced, a lateral approach to the tarsometatarsal joint was made. The tarsometatarsal joint then was exposed. Arti

Background: Trauma to the canine foot may result in injury to soft tissue or bone or both. Foot injury often results in fractures and joint instability because of disruption to carpal or tarsal ligaments. Several fi xation methods have been described for stabilizing tarsometatarsal arthrodesis. The aim of this paper is to report the case of a unilateral tarsometatarsal arthrodesis with use of circular skeletal fi xator on the left pelvic limb of a dog.Case: A 5-year-old intact male dog weighting 25 kg was referred to the veterinary hospital with a left tarsal degloving injury. The previous history revealed that the dog had been bitten by another dog seven days prior to the referral. On physical exam it had swelling and severe pain on the left foot, crepitus of the intertarsal/tarsometatarsal region, instability, bone exposure and myiasis larvae on the wound. The dog was non-weight-bearing on the affected limb. No other abnormalities were found. Radiographs revealed it to be an open fracture of the left tarsal distal line with tarsometatarsal luxation. Adherent dressings were changed for seven days to minimize the contamination before surgery. The dog was treated by open reduction and internal fixation using a circular skeletal fixator. After general anesthesia was induced, a lateral approach to the tarsometatarsal joint was made. The tarsometatarsal joint then was exposed. Arti

Retalho de omento maior para indução de vascularização e consolidação óssea em cão

This research reports the case of a whippet female dog, 10 years old, with delayed union of left tibia and fibula, exposure of the fracture focus with localized infection, and extensive loss of, muscle, bone and skin after instability caused by two surgical interventions accomplished previously. A flap was made of the greater omentum in a single layer. The fracture site was reached through the subcutaneous tunnel and the coating by mesh skin grafts. The objective of this study was to evaluate the ability of the larger omentum to induce angiogenesis to the fracture site and the subsequent bone healing, considering the strong role of angiogenesis. The left tibia and fibula were stabilized with external circular fixator. After 80 days there was bone healing of the tibia around the support member and removal of the implant. Postoperative complications included partial necrosis of the cutaneous (25%) flap and shortening of the tibia with consequent laxity ligament of the member.

Este trabalho relata o caso de uma cadela da raça whippet, de 10 anos, com união retardada de tíbia e fíbula esquerdas, exposta, cotaminada e com grande perda de massa muscular e óssea e de pele causada por instabilidade óssea decorrente de duas intervenções cirúrgicas realizadas anteriormente. Foi realizado retalho de omento maior em camada simples, alcance ao foco de fratura via túnel subcutâneo e recobrimento por enxerto cutâneo em malha. O objetivo do trabalho foi avaliar a capacidade de indução vascular do omento maior para foco de fratura e consequentemente consolidação óssea, tendo como hipótese a acentuada função de angiogênese do omento maior. A tíbia e fíbula esquerdas foram estabilizadas com fixador circular externo. Após 80 dias, houve consolidação óssea da tíbia, volta do apoio do membro e retirada do implante.

Retalho de omento maior para indução de vascularização e consolidação óssea em cão

This research reports the case of a whippet female dog, 10 years old, with delayed union of left tibia and fibula, exposure of the fracture focus with localized infection, and extensive loss of, muscle, bone and skin after instability caused by two surgical interventions accomplished previously. A flap was made of the greater omentum in a single layer. The fracture site was reached through the subcutaneous tunnel and the coating by mesh skin grafts. The objective of this study was to evaluate the ability of the larger omentum to induce angiogenesis to the fracture site and the subsequent bone healing, considering the strong role of angiogenesis. The left tibia and fibula were stabilized with external circular fixator. After 80 days there was bone healing of the tibia around the support member and removal of the implant. Postoperative complications included partial necrosis of the cutaneous (25%) flap and shortening of the tibia with consequent laxity ligament of the member.

Este trabalho relata o caso de uma cadela da raça whippet, de 10 anos, com união retardada de tíbia e fíbula esquerdas, exposta, cotaminada e com grande perda de massa muscular e óssea e de pele causada por instabilidade óssea decorrente de duas intervenções cirúrgicas realizadas anteriormente. Foi realizado retalho de omento maior em camada simples, alcance ao foco de fratura via túnel subcutâneo e recobrimento por enxerto cutâneo em malha. O objetivo do trabalho foi avaliar a capacidade de indução vascular do omento maior para foco de fratura e consequentemente consolidação óssea, tendo como hipótese a acentuada função de angiogênese do omento maior. A tíbia e fíbula esquerdas foram estabilizadas com fixador circular externo. Após 80 dias, houve consolidação óssea da tíbia, volta do apoio do membro e retirada do implante.