Prospective Neodent® Zirconia System Study

Inclusion Criteria: * 18 years of age or older; * Maxillary posterior teeth missing, with adjacent natural teeth; * Patient who are in need of oral rehabilitation with dental implants and single prostheses and qualify for placement of Zirconia Implants. Exclusion Criteria: Subjects under 18 years of age, pregnant or breastfeeding women. And patients that present the device contraindications according to the IFU (instructions for use): * Signs of allergy or hypersensitivity to the chemical ingredients of the material: Zirconia (Y-ZTP), Zirconium dioxide (ZrO2), Yttrium oxide (Y2O3), Hafnium dioxide (HfO2), Aluminum oxide (Al2O3); * Acute inflammatory or infectious processes; * Unsuitable bone volume or quality; * Serious medical problems (e.g. bone metabolism disorders, blood clotting disorders, unsuitable healing capacity); * Incomplete jawbone growth; * Patient uncooperative and not motivated; * Hypochondria; * Alcoholism; * Psychosis; * Prolonged functional disorders which resist any treatment with medications; * Xerostomia; * Weakened immunological system; * Diseases which require regular use of steroids; * Uncontrolled endocrine diseases; * Insufficient oral hygiene; * Pregnancy;