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Li Q, Jepsen S, Albers HK, Eberhard J.Li Q, et al. Among authors: eberhard j.Dent Mater. 2006 Mar;22(3):250-7. doi: 10.1016/j.dental.2005.04.011. Epub 2005 Aug 9.Dent Mater. 2006.PMID: 16084584Clinical Trial.