The influence of multiple-pass sliding on the surface failure of fluorapatite single crystals was evaluated. The surface and subsurface damage on the basal plane of fluorapatite was accelerative, rather than additive. Damage was more severe for sliding in opposite directions than for two traversals in the same direction.
No takes yet. Share an insight, caveat, or question.
Powers et al. (1973) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: