Tandheelkundige implantaten : rapportage project OG 89-76 ontwikkelingsgeneeskunde / [onderzoekers: E.M. Boerrigter, M.E. Geertman, J.M. Kwakman]Implant-retained mandibular overdentures : clinical and psychosocial aspects / Elisabeth Maria BoerrigterImplant-retained mandibular overdentures : clinical and psychosocial aspects / Elisabeth Maria Boerrigter