Objective: To evaluate the applicability and clinical effectiveness of a modified clamp-rod internal fixation (M-CRIF) system compared with conventional locking plate osteosynthesis in the treatment of feline corpus ilium fractures.
Study design: Prospective, controlled clinical study.
Animals: Thirty-six client-owned cats with corpus ilium fractures.
Methods: Cats were randomly assigned to two groups: Group I (M-CRIF, n = 18) and Group II (locking plate, n = 18). All fractures were stabilized with a lateral approach. Radiographic healing, sacral index (SI), and complications were assessed at postoperative days 21, 45, 60, and 120. Long-term outcomes were assessed using owner questionnaires addressing mobility and defecation.
Results: Fracture union was achieved in all cats. Healing scores increased over time in both groups (p < .05). At day 45, Group I showed higher healing scores than Group II (p = .002). Sacral index narrowing was lower in Group I (p = .005). Implant-related complications occurred in 22.2% (4/18) of cats in the plate group, including screw loosening and one revision surgery, whereas no screw loosening was observed in the M-CRIF group. Preoperative neurological deficits were present in 22.2% of cats, decreasing to 5.5% postoperatively. Owner questionnaires indicated satisfactory mobility, although some discrepancies with clinical and radiographic findings were observed.
Conclusion: The M-CRIF system provided greater stability, fewer complications, and better preservation of the pelvic canal than locking plates.
Clinical significance: This study is the first clinical evaluation of the M-CRIF system in feline ilial fractures and demonstrates favorable outcomes, supporting its use as a reliable alternative to conventional plating.
