Locked plate versus modified clamp-rod internal fixation for feline corpus ilium fractures: A comparative clinical study.

M-CRIF provides superior stability with fewer complications than locking plates for feline ilial fractures.

This prospective, controlled clinical study compared modified clamp-rod internal fixation (M-CRIF) with conventional locking plate osteosynthesis for treating feline corpus ilium fractures in 36 client-owned cats (18 per group). All fractures achieved union, with both groups showing progressive healing over the 120-day postoperative period. The M-CRIF group demonstrated superior radiographic healing scores at day 45 and significantly less sacral index narrowing, indicating better preservation of pelvic canal anatomy. Importantly, implant-related complications occurred in 22.2% of the locking plate group (screw loosening and one revision surgery) compared to zero complications in the M-CRIF group. Preoperative neurological deficits were present in 22.2% of cats but improved to 5.5% postoperatively. Owner-reported functional outcomes regarding mobility and defecation were satisfactory in both groups, though some discrepancies with objective clinical and radiographic findings were noted. This represents the first clinical evaluation of M-CRIF in feline ilial fractures, demonstrating superior biomechanical stability, fewer complications, and better pelvic anatomy preservation compared to conventional plating techniques.

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