34th Annual Scientific Meeting proceedings

Objectives:

Novel 3D printed implants for ventral cervical fusion were developed using CT scans, according to the specific equine cervical anatomy and biomechanics. Two types of implants were designed: a Cervical Plate and Spacer (CPS) designed for C2 to C6 and a Zero-profile Anchored Spacer (ZAS) specifically designed for C7-T1 and C6-C7 cervical fusion. The objective of this study was to evaluate the outcome of 53 horses who underwent cervical fusion using these implants

Methods:

Pre-operative and post-operative ataxia grades were assessed using the Mayhew’s grading system. Return to expected level of exercise, and owner’s satisfaction were evaluated by phone calls

Results:

There was no implants failure or displacement. 80% of horses were operated for CVSM and 20% for fractures. 57% had a cranial single ventral cervical fusion from C2 to C6, 29% had a single caudal fusion from C7 to T1, and 14% had a double fusion. Horses who underwent cranial cervical fusion improved 2 grades when evaluated at less than 1 year post operatively and 2.5 grades when evaluated at more than 1 year. There were less cases of C6 to T1 cervical fusion but those assessed after 1 year improved 2 grades in mean. The main complication was right laryngeal hemiplegia for caudal cervical fusion. One horse had a fatal accident during recovery

Conclusions:

Preliminary results of ventral Cervical fusion using 3D printed cervical implants showed excellent results and can be recommended