Clinical Study Comparing Submerged Versus Trans-mucosal Healing of P.004 Implants in the Anterior Mandible and Maxilla

Inclusion Criteria: * Males and females \>18 years of age. * Implant placement planned in the anterior maxilla or mandible (FDI tooth numbers 21 - 25, 11 - 15, 31-35, 41-45). * Tooth site must have a natural tooth both mesially and distally in the adjacent tooth positions * Opposing dentition of natural teeth, or tooth or implant-supported fixed restorations. * Adequate bone quality and quantity at the implant site to permit the insertion of a Straumann P.004 SLActive implant of 8, 10, 12, or 14 mm length. * Presence of a sufficient band of keratinized mucosa (min. 2 mm) to allow surgical manipulation and suturing according to the protocol * Signed informed consent document before being treated in the study Exclusion Criteria: * Systemic disease that would interfere with dental implant therapy (e.g. uncontrolled diabetes) * Any contraindications for oral surgical procedures * Current untreated periodontitis or gingivitis * Probing pocket depth of more than 4 mm at one of the adjacent teeth * Mucosal diseases (e.g. erosive lichen planus) * History of local irradiation therapy * Bone augmentation procedures if the procedure require healing time of more than 12 weeks after implant placement * Implants in adjacent position to planned implant * Severe bruxing or clenching habits * Heavy smokers: Patients who smoke more than 20 cigarettes per day * Conditions or circumstances, in the opinion of the investigator, which would prevent completion of study participation. * Patients with inadequate oral hygiene or unmotivated for adequate home care Secondary Exclusion Criteria at Implant Surgery: * Lack of primary stability of the implant * Inappropriate implant position to insert implants according to the prosthetic requirements. * Patients with augmentation procedures requiring more than 12 weeks healing time.