Biomechanical study in vitro on the use of self-designed external fixator in diaphyseal III metacarpal fractures in horses.

This study investigates the biomechanical strength and effectiveness of a newly designed external fixator for treating diaphyseal fractures of the metacarpal III bone in horses.

Context and Background

• Diaphyseal fractures of the III metacarpal bone account for 22% of all long bone fractures in horses. The usual treatment involves the use of two plates applied directly to the bone surface. However, this method is unsuitable for contaminated or infected fractures.
• Although external fixators are commonly used in human medicine, there is no standardized fixator designed specifically for diaphyseal fractures of the III metacarpal bone in veterinary practice. The researchers in this study aimed to fill this gap by designing such a fixator.

The Novel External Fixator

• The researchers designed an external semicircular fixator and conducted in vitro strength tests on it. The goal was to determine the maximum force that would lead to the destruction of the non-fractured bone and the fractured bone treated with the fixator.

Key Findings

• Based on the strength tests, it was concluded that the newly designed external stabilizer was sufficiently strong to allow a horse to stand up after surgery.
• The fixator also had many beneficial features including being easy to assemble, facilitating wound care, and being safe for the animal.

Implications

• The study highlights a promising new method of treatment for metacarpal III bone fractures in horses.
• This external fixator may overcome the limitations of current treatment options, particularly for infected or contaminated fractures, and contribute to better post-surgical recovery outcomes.