Evaluation of Experimental Proximal Femoral Physeal Fractures Repaired with Two Cortical Screws Placed from the Articular Surface

D. M. Tillson; R. M. McLaughlin; J. K. Roush

doi:10.1055/s-0038-1633087

Veterinary and Comparative Orthopaedics and Traumatology, Inhaltsverzeichnis

Vet Comp Orthop Traumatol 1994; 07(04): 140-147
DOI: 10.1055/s-0038-1633087

Original Research

Schattauer GmbH

Evaluation of Experimental Proximal Femoral Physeal Fractures Repaired with Two Cortical Screws Placed from the Articular Surface

D. M. Tillson

¹From the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA

,

R. M. McLaughlin

¹From the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA

,

J. K. Roush

¹From the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA

› Institutsangaben

Abstract

Summary

Proximal femoral physeal fractures were surgically created unilaterally in twelve immature dogs and repaired using two cortical screws placed in lag fashion from the articular surface into the femoral neck. Four dogs were euthanatized at two, four and eight weeks after surgery and evaluated by gross examination, fine detail radiography, fine detail angiography and histology. Mild to severe injury to the articular cartilage of the acetabulum was observed in all operated joints. Narrowing of the femoral neck was evident on fine detail radiographs and was most severe at week four. Metaphyseal vessels crossed the physis and revascularized the epiphysis with greater than 90% of the epiphysis being revascularized by eight weeks. Operated femora showed histological evidence of physeal disruption and premature physeal closure. Osteocyte death in the epiphysis was evident histologically with viable osteocytes following revascularization and proceeding from distal to proximal through the epiphysis over eight weeks.

The healing of proximal fe-moral physeal fractures repaired with two, 2.0 mm cortical screws placed from the articular surface was evaluated by gross evaluation, fine detail radio-graphs and angiographs, and histological examination. Fracture healing and restoration of blood supply was adequate for weight bearing. This technique is acceptable for use in clinical patients.

Keywords

Proximal femur - physeal fracture - blood supply - physis - dogs

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Referenzen

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