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Smear layer formation

A. Bur marks on dentin preparation B, Higher magnification showing smear layer surface and cutting debris. C, Section showing smear layer (SL) and smear plugs (S.P.). (A and B from Marshall GW, et al: Scanning Microsc. 2, 2007-2028, 1988; C from Pashley DH, et al: Arch. Oral Biol. 33, 265-270,