Long-term implant prognosis in patients with and without a history of chronic periodontitis: a 10-year prospective cohort study of the ITI Dental Implant System. - Karoussis,I.K.; Salvi,G.E.; Heitz-Mayfield,L.J.; Bragger,U.; Hammerle,C.H.; Lang,N.P. (Clin Oral Implants Res, 2003)