A Study of the Performance of Certain Prevail Implants Used in Short Fixed Cases

Inclusion Criteria: * patients of either sex and any race greater than 18 years of age * patients for whom a decision has already been made to use dental implants for treating an existing dental condition specifically: a partially edentulous short fixed case of less than 4 implants in the maxilla or mandible; no cantilevers are allowed, but one interior crown may be a pontic * patients must be physically able to tolerate conventional surgical and restorative procedures * patients must agree to be evaluated for each study visit, especially the yearly follow-up visit Exclusion Criteria: * patients with active infection or severe inflammation in the areas intended for the implants * patients with more than 10 cigarette per day smoking habit * patients with uncontrolled diabetes mellitus * patients with metabolic bone disease * patients who have had treatment with therapeutic radiation to the head within the past 12 months * patients in need of allogenic bone grafting at the site of the intended study implant * patients who are pregnant at the screening visit * patients with evidence of severe para-functional habits such as bruxing or clenching * patients with cantilevers and more than one pontic per bridge