Evaluation of Immediate Versus Delayed Loading of Dental Implants With a Modified Surface

Inclusion Criteria: * Males and females must be at least 18 years of age * Have at least one missing tooth in positions FDI 4, 5, 6, or 7 in any quadrant (ADA positions 2, 3, 4, 5; or 12, 13, 14, 15; or 20, 21, 22, 23; or 28, 29, 30, 31.) * Subjects desire an implant supported restoration on1 to 4 implants per quadrant * The tooth/teeth position(s) at the proposed implant site must have been extracted or lost at least 4 months before the date of implantation and be fully healed * Adequate bone quality and quantity at the implant site to permit the insertion of a Straumann standard 4.1 mm diameter implant of at least 8 mm length without the use of concurrent bone augmentation techniques. If more bone is available and is indicated a Straumann standard 4.8 mm diameter implant with a wide neck of at least 8 mm length may be used, i.e. implant insertion sites must have sufficient bone height such that the implant will not encroach on vital structures and sufficient width that a minimum of 1 mm of bone lingual and buccal bone will remain * The opposing dentition must be natural teeth or fixed crowns or bridges on natural teeth or implants. Removable prostheses or dentures opposing the study implants are not allowed * Patients must be committed to the study for its full duration. Exclusion Criteria: * Presence of conditions requiring chronic routine prophylactic use of antibiotics (e.g., history of rheumatic heart disease, bacterial endocarditis, cardiac valvular anomalies, prost…