TY - RPRT TI - Enamel pretreatment: a critical variable in direct bonding systems. AU - N A Wickwire AU - D Rentz PY - 1973 DO - 10.1016/0002-9416(73)90263-7 UR - https://pubmed.ncbi.nlm.nih.gov/4583413/ ID - 4583413 ER -