Nowadays, the replacement of missing teeth with endosseous implants for the rehabilitation of edentulous or partially edentulous patients has become a standard of care, and the ten-year success rate is up to 90%. However, dental implants fail occasionally. Available studies indicate that dental implants failure usually occurs in the early stage, and the risk of late failure increases for the patients with early failure. However, the impact factors on the incidence of implant early failure are not definite. A variety of factors may have a potential influence on the incidence of dental implant early failure, such as host factors, character of implants, clinicians, surgical technique and soon. Proper patient selection is a key issue in treatment planning, and analysis of host factors will guide clinical practice. This review focused on the effect of host factors on implant early failure.
