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Eastwood / Cole Method

(JBJS. 77-B:743-7. 1995)

The graph.
The chronological age is plotted on the horizontal axis in years with two-monthly subdivisions and the leg-length discrepancy on the vertical axis in centimetres with 0.2 cm subdivisions (Fig. 1). The latter has been restricted to 12 cm for clarity; 16 cm is normally used. The heavy vertical line at 16 years on the boy's graph (Line 1, Fig. 1) and at 14 years on the
girl's graph (see Fig. 3) are the skeletal maturity lines which are the average ages at which skeletal growth ceases (Menelaus 1966).

Superimposed on the graphs are epiphyseodesis reference slopes (Slopes 1 to 3, Fig. 1) which converge to the skeletal maturity lines at zero leg-length discrepancy. The slopes of these lines are based on the average annual growth of 0.6 cm from the proximal tibial growth plate and 1 cm from the distal femoral growth plate after the age of 8 years in girls and 10
years in boys (White and Stubbins 1944; Anderson et al 1963; Westh and Menelaus 1981). 

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