Eine klinische Studie mit Keramikimplantaten , die randomisiert mit Kronen aus drei verschiedenen Materialien versorgt werden

Group 1: Zirconia implants (ceramic.implant, VITA).
Prosthetic reconstruction: monolithic zirconia (VITA YZ)
Group 2: Zirconia implants (ceramic.implant, VITA).
Prosthetic reconstruction: monolithic polymer infiltrated ceramic (VITA Enamic)
Group 3: Zirconia implants (ceramic.implant, VITA).
Prosthetic reconstruction: monolithic polymer (VITA CAD-Temp)

Gender: All
Maximum age: None
Minimum age: 20 Years
Inclusion criteria: ?Male and female patients at least 20 years old, in need of an implant supported single tooth restoration
?No general medical condition which represents a contraindication to implant treatment
?One missing tooth in the mandible or maxilla in position of premolars or molars
?At least 10 mm of vertical bone height in the mandible allowing for the placement of a 8 mm implant (2 mm safety distance to inferior alveolar nerve)
?At least 7 mm of vertical bone height in the maxilla allowing for a 1 mm internal sinus elevation procedure (Osteotome technique).
?Signed informed consent form

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
?Women who are pregnant or breast feeding at the date of inclusion
?Known or suspected non-compliance, drug or alcohol abuse
?Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. of the participant