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. Author manuscript; available in PMC: 2012 Oct 13.

Published in final edited form as: J Biomech. 2011 Aug 31;44(15):2659–2666. doi: 10.1016/j.jbiomech.2011.08.006

6a. Examples of the two groups of propagated linear damage, contained and extended, are shown under filters for each fluorescent stain as well as the composite image (alizarin=red, calcein=green). 6b. Comparisons of the number of contained versus extended damage incidents demonstrated that damage of a linear morphology was more likely to remain confined to its initial damage length in both age groups. 6c. Length measurements of linear damage incidents showed that the initial length of damage (initial extended) which extended during the fatigue test (final extended) did not exceed the length of contained linear damage incidents for both age groups. Bars represent significant differences.

6a. Examples of the two groups of propagated linear damage, contained and extended, are shown under filters for each fluorescent stain as well as the composite image (alizarin=red, calcein=green). 6b. Comparisons of the number of contained versus extended damage incidents demonstrated that damage of a linear morphology was more likely to remain confined to its initial damage length in both age groups. 6c. Length measurements of linear damage incidents showed that the initial length of damage (initial extended) which extended during the fatigue test (final extended) did not exceed the length of contained linear damage incidents for both age groups. Bars represent significant differences.