J Korean Orthop Assoc.  1974 Dec;9(4):425-430. 10.4055/jkoa.1974.9.4.425.

The Experimental Study on Traumatic Epiphyseal Seperation

• Lee CT

• KMID: 2471466
• DOI: http://doi.org/10.4055/jkoa.1974.9.4.425

Abstract

Traumatic epiphyseal separation was produced in the young rabbit weighing about 1 kg, and the type of injuries according to Salter and Harris method and location of the cleavage line within the epiphysis were studied radiologically and histologically, with the following result. 1. At the distal femur and the distal radius, the hyperextension force produced predominantly the Type 1 injury, in 95% and 75% respectively, while the rotation force resulted mainly in the Type I. in 65% and 90% respectively. The lateral bending produced almost the equal ratio of the Type 1 and 1. 2. Of all the injuries, the cleavage line within the epiphyseal growth plate could be located in the hypertrophying cartilage cell layer in 58.8%, in that it was 76% in the hyperextension group, 51% in the lateral bending group, and 49% in the rotation group. 3. The results of the above experiment have shown that the external violence of severe and complicated nature tended to produce the Type I injury, and the line of cleavage thus produced had the tendency to be located out of the hypertrophying cell layer, the common site of its separation.

MeSH Terms

Cartilage
Epiphyses
Femur
Growth Plate
Methods
Radius
Violence

Figure

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  Fig. 1 Radiograph of normal distal femur of the rabbit with its epiphyseal plate is shown.

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  Fig. 2 Radiograph of Type I injury of the distal femur.

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  Fig. 3 Radiograph of Type II injury of the distal tibia.

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  Fig. 4 Radiograph of Type I injury of the proximal tibia.

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  Fig. 5 Radiograph of Type II injury of the proximal tibia.

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  Fig. 6 The epiphyses of mormal rabbit are shown.

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  Fig. 7 The separation passes through the hypertrophying cartilage cell layer (H)

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  Fig. 8 Type II injury of the epiphysis is shown. The cleavage passes through the proliferating cartilage (P) and the hypertrophying cartilage cell layer (H) and then extend into the metaphysis(M)

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  Fig. 9 The cleavage line of this separation passes between the proliferating cartilage and hypertrophying cartilage cell layer.

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  Fig. 10 In this Type I injury the separation occur between the hypertrophying cell layer and endochondral ossification zone (EO)

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  Fig. 11 In this Type I injury the separation occur between the hypertrophying cell layer and endochondral ossification zone (EO)

Reference

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