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Stabilizator zewnętrzny własnej konstrukcji do leczenia złamań trzonu kości śródręcza III u koni

100%
Turek B., Potynski A., Drewnowska O.
Medycyna Weterynaryjna
|
2016
|
tom 72
|
nr 03
The most popular method of repairing diaphyseal fractures of the third metacarpal bone is the use of two plates attached directly to the bone. However, the closing of tissue over the plates may be difficult. Moreover, many such fractures are open and therefore contaminated and infected. In such situations, plates cannot be applied. The use of implants fixed in the bone with polymer-coated dressing (cast transfixation) is promising, but the stabilization of bone fragments is insufficient, which can lead to the loosening of the connection between the implant and the dressing. The use of external fixators in the treatment of bone fractures, although quite common in human medicine, is still very rare in horses, No solution for diaphyseal fractures of the third metacarpal bone is currently available on the veterinary market. One possible option might be the use of an external fixator developed by the authors of the present study. The main part of the fixator consists of three metal rods with a diameter of 8 mm and a length of 23 cm, parallel to each other and placed along the long axis of the bone. In the proximal and distal parts of the device, the rods are connected by crescent-shaped plates. On these three metal rods, arms with implant connectors are mounted, attaching the fixator to the bone. It is attached to the third metacarpal bone by 6-8 self-tapping Apex pins with a diameter of 6 mm. The device was designed to meet the following requirements: ease of application and removal, small tissue trauma associated with these operations, adjustable flexibility of fixation and possible correction during treatment, low weight, easy access to the operated area and the possibility of treating an existing wound, good stabilization of bone fragments, and suitability for different types of fractures. The new fixator fully satisfies all these requirements The fixation achieved by means of the device has successfully passed strength tests, and this solution is planned to be implemented in the treatment of selected fractures in horses, especially transverse diaphyseal fractures of the third metacarpal bone.
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Biomechanical study in vitro on the use of self-designed external fixator in diaphyseal III metacarpal fractures in horses

76%
Turek B., Potynski A., Wajler C., Szara T., Czopowicz M., Drewnowska O.
Polish Journal of Veterinary Sciences
|
2015
|
tom 18
|
nr 2
Diaphyseal fractures of the III metacarpal bone represent 22% of all fractures of the long bones in horses. Treatment of such cases is difficult. The most popular solution used in these types of fractures is two plates applied directly to the bone surface, but they are not applicable on contaminated and infected fractures. External fixators are quite commonly used in human medicine, although in veterinary practice there is no typical stabilizer designed for the treatment of diaphyseal fractures of the III metacarpal bone so far. In this study, an external semicircular fixator of our own design was used and in vitro strength tests were conducted to determine the maximum force which would lead to the destruction of non-fractured bone and fractured bone treated with the stabilizer. On the basis of the strength tests, we can conclude that the stabilizer can be strong enough to allow the horse to stand up after surgery. It also has many favorable features which make it easy to assemble and to take care of a wound, while being safe enough for the animal at the same time
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