Absence of carious lesions at margins of glass-ionomer cement (GIC) and resin-modified GIC restorations: a systematic review - Mickenautsch, Steffen; Tyas, Martin J.; Yengopal, Veerasamy; Oliveira, Luciana B.; Bönecker, Marcelo (European journal of prosthodontics and restorative dentistry, 2010)