Holding Power of Orthopaedic Screws in Femora of Young Calves

J. Kirpensteijn; J. K. Roush; G. St-Jean; R. M. DeBowes; E. M. Gaughan

doi:10.1055/s-0038-1633050

Veterinary and Comparative Orthopaedics and Traumatology, Inhaltsverzeichnis

Vet Comp Orthop Traumatol 1993; 06(01): 16-20
DOI: 10.1055/s-0038-1633050

Original Research

Schattauer GmbH

Holding Power of Orthopaedic Screws in Femora of Young Calves

Autoren

J. Kirpensteijn

¹Comparative Orthopaedic Research Group of the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
J. K. Roush

¹Comparative Orthopaedic Research Group of the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
G. St-Jean

¹Comparative Orthopaedic Research Group of the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
R. M. DeBowes

¹Comparative Orthopaedic Research Group of the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA
E. M. Gaughan

¹Comparative Orthopaedic Research Group of the Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA

Abstract

Summary

The holding power and holding power per mm bone width of 4.5 mm and 5.5 mm cortical and 6.5 mm cancellous orthopaedic screws were obtained by load-to-failure studies in excised femora of young female Holstein calves. Mean ( ± SD) holding power (HP), holding power per mm bone width (HPBW), and holding power per cortical bone width (HPCW) of 4.5 mm (179.67 ± 59.74 kg), 5.5 mm (171.46 ± 76.52 kg), and 6.5 mm orthopaedic screws (191.10 ± 56.67 kg) were not significantly different. The HP, HPBW, HPCW, bone width (BW), and cortical width (CW) were not different between left and right femora. The greatest HP was obtained in the proximal femoral diaphysis, while the smallest HP was observed in the proximal and distal metaphysis. The increase in HP was related to the increase in CW, but was not related to the BW. The CW at the insertion sites of orthopaedic screws in femora was significantly less than in metacarpi and metatarsi. The limiting factor of holding power in all tests was the shear strength of the bone.

This study compares the holding power, holding power per mm bone width, and holding power per mm cortical width of 4.5 mm and 5.5 mm cortical and 6.5 mm cancellous orthopaedic screws in excised femora of young female Holstein calves. The holding power, holding power per mm bone width, and holding power per mm cortical width of different screws were not significantly different.

Keywords

Holding power - orthopaedic screw - calf - femur

Volltext

Referenzen

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