Equine standing surgery has become increasingly popular in recent years with the advent of improved sedative/analgesic protocols, surgical instrumentation, facilities, and surgical experience. Diagnostic and minor therapeutic procedures such as trephination and sinoscopy for equine dental- and sinus-related diseases have been successfully used in the standing horse. However, a report on standing sinusotomies in horses was not published until 2000.1 Since that time, standing sinusotomies have become the preferred method for many surgeons, and advantages and disadvantages have been described.2'3 The large frontonasal bone flap is the approach of choice for most sinus diseases.
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