Evaluation for radiographic changes in the coxofemoral joint and proximal femur following intramedullary stabilisation of diaphyseal femoral fractures using angle-stable interlocking nails in skeletally immature patients.

Angle-stable interlocking nails safely treat juvenile femoral fractures without proximal femoral malformation.

This retrospective study evaluated the safety and efficacy of angle-stable interlocking nails for treating diaphyseal femoral fractures in skeletally immature dogs. Ten juvenile dogs were surgically stabilized between 2010 and 2023, with radiographic and clinical assessment performed at skeletal maturity. Standardized orthopedic examinations included Canine Brief Pain Inventory scoring and comprehensive radiographic analysis measuring anatomic and mechanical angles in frontal and sagittal planes. Results demonstrated excellent pain control, with six dogs achieving zero pain scores and three showing minimal pain (≤10/100). Notably, no cases developed proximal femoral malformation during perioperative follow-up or at skeletal maturity. Two dogs exhibited bilateral coxofemoral osteoarthritis at maturity. Statistical analysis identified CORONA1 as the only significantly different measurement between surgical and contralateral femurs at skeletal maturity, attributed to natural reduction in femoral procurvatum. The study concluded that angle-stable interlocking nails represent a safe and effective stabilization method for juvenile femoral diaphyseal fractures without contraindication for use in canine patients.

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