Surgery for pet fractures is also increasing, and simultaneous fractures of the radius and ulna are particularly common, accounting for more than 30% of the fracture incidence. At this time, since the two long bones have lost their support points, the simple external fixation plaster dressing cannot stabilize the fractured end well, resulting in poor fracture healing. Therefore, surgical treatment must be used, and implants are used to help the fractured bone effectively and stably. fixed. There are many types of ulna and radius fractures, and what implant to use for internal fixation is a problem that our doctors need to consider.
Common implants for ulna and radius fractures
Orthopedic implants are medical devices used to restore the structural integrity of damaged bones or to replace missing bones and joints. In the field of fracture repair, the choice of the most appropriate implant and fixation is influenced by many mechanical, biological, and clinical factors.
Orthopedic steel wire
Orthopedic wires are made of 316L stainless steel. Compared to other implants, the orthopedic wire is more malleable, and the veterinary surgeon can easily shape and fix it by kinking. The main clinical indications of orthopedic steel wire are cerclage wire fixation and tension band fixation.
Application principles of cerclage wire
The cerclage wire is not suitable as a fixation method for fractures alone. It is usually used as an auxiliary fixation method for intramedullary nails to provide compression between sections.
·Applicable only to fractures with 2 fragments that can be completely reconstructed. Comminuted fractures should be avoided.
·Apply at least 2 cerclage wires.
The distance between the wires should not be less than 10mm, and the distance from the end of the fracture fragment should be at least 5mm.
• The wire should be fixed perpendicular to the long axis of the bone to avoid loosening. Cerclage fixation should be avoided in wedge-shaped bones (dry-scale end).
The diameter of the wire must be suitable for the size of the fractured bone. The tensile strength of steel wire is related to its cross-sectional area. For dogs weighing 20 kg, use a wire (18G) with a diameter of more than 1 mm. The minimum diameter of wire for small dogs and cats is 0.8mm (20G).
· To avoid entanglement of soft tissue.