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Buser, Daniel; Bornstein, Michael M; Weber, Hans Peter; Grütter, Linda; Schmid, Bruno; Belser, Urs C (2008). Early implant placement with simultaneous guided bone regeneration following single-tooth extraction in the esthetic zone: a cross-sectional, retrospective study in 45 subjects with a 2- to 4-year follow-up. Journal of periodontology, 79(9), pp. 1773-81. Chicago, Ill.: American Academy of Periodontology 10.1902/jop.2008.080071
