3) Hammerström L. Enamel matrix, cementum development and regeneration. J Clin Periodontol 24: 658-668, 1997.
4) Sculean A, Donos N, Windisch P et al. Healing of human intrabony defects following treatment with enamel matrix proteins or guided tissue regeneration. J Periodontal Res 34: 310-22, 1999.