Use of a pinless external fixator for unilateral mandibular fracture repair in nine equids.

This research examines the use of a pinless external fixator (PEF) to repair unilateral mandibular fractures in 9 horses. It found PEF to be minimally invasive and effective, but noted aftercare is time consuming.

Methodology

• The study evaluated a case series involving nine equids – which include horses, donkeys or mules – that had unilateral (one-sided) mandibular (lower jaw) fractures.
• All fractures were stabilized using an instrument called the AO/ASIF PEF – a piece of equipment that helps hold broken bones in place, externally, for healing.
• A minimum of 4 clamps was used on each fracture, and the operation was performed under general anesthesia.

Evaluation

• The research considered multiple factors to evaluate the efficacy of the procedure. These included the fracture’s configuration, any complications during and after surgery, the overall outcome of the repair, and satisfaction of the animal’s owners.

Results

• All fractures were successfully stabilized by the procedure, but two cases resulted in euthanization. One equid had to be put down due to an inability to stand after surgery, and another because the owners made the decision after a dislodgement of the PEF.
• Seven out of the nine cases achieved good outcomes, with the fractures healing well and the owners satisfied with the procedure.
• The study noted several complications, such as dislodgement of the PEF in three cases, bone sequestration (formation of necrotic bone) in three cases, and weight loss in one case. Drainage issues associated with the repairs were resolved after removal of necrotic bone and clamps.

Conclusion

• The use of PEF was found to be minimally invasive and effective for unilateral mandibular fracture repair in equids, presenting minimal risk of tooth root interference.
• Despite its success, the study noted that aftercare following the use of PEF is time consuming, which can be a drawback for its use.
• Nonetheless, the researchers recommended PEF as an alternative technique for stabilizing unilateral mandibular fractures in equids.