Two Implants Versus One Implant With a Cantilever - a Randomized Controlled Clinical Trial

Inclusion Criteria: * male and female patients 18 years to 80 years of age * no general medical condition which represents a contraindication to implant treatment * two adjacent missing teeth in the maxilla or mandible in positions of premolars and molars * at least one tooth present adjacent to the edentulous space * indication for implant treatment is given * at least 8 mm of vertical bone height in the mandible allowing for the placement of a 6 mm implant (2 mm safety distance to inferior alveolar nerve) * at least 4 mm of vertical bone height in the maxilla * signed informed consent after being informed Exclusion Criteria: * smoking of more than 15 cigarettes a day (clinical studies show an increased failure rate of implants in heavy smokers) * poor oral hygiene after hygienic phase (Plaque Index over 30 %) * active periodontal disease * pregnancy or breastfeeding at date of inclusion