Fig. 4From: Mechanical wear analysis helps understand a mechanism of failure in retrieved magnetically controlled growing rods: a retrieval studyProfile of a trace extracted from the contour map of the telescopic region of a MAGEC rod. Surface wear was depicted as several valleys (a, red), while surface debris was shown in green (b, green) The maximum depth of these valleys (c) and the summed area of all the valleys (d) were calculatedBack to article page