Risk factors for implant treatment failure: a case-control study

Numerous early studies have highlight a direct boneto-implant contact referred as osseo-integration and obtained encouraging clinical long-term results in treatment of edentulous patients (Adell et al. 1981; Adell et al. 1990; Brånemark et al. 1977; Schroeder et al. 1981; Wedgwood et al. 1992).