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Subsidence measurement. (1) Centre of head for magnification error (ME), (2) centre of head to tip of lesser trochanter (LT), (3) tip of greater trochanter to shoulder of stem (GT), (4) calcar height (CH), (5) canal fill ratio, (5a) middle 1/3, (5b) lower 1/3, (6) varus or valgus angulation.
