Implant-supported Fixed Dental Prostheses (FDPs) With Cantilever Extension

Inclusion Criteria

• •Patients aged ≥18 years
• •Written informed consent
• •Patients with systemic health or controlled medical conditions
• •Patients with healthy or treated periodontal conditions
• •Patients enrolled in regular supportive periodontal therapy (SPT)
• •Patients without clinical signs of bruxism and/or oral parafunctions
• •2 osseointegrated dental implants in the canine or posterior areas of maxilla and mandible following transmucosal placement and healing of 3-6 months
• •Tissue level solid-screw implants with a sand-blasted and acid- etched (SLA) surface with an endosseous diameter of 3.3, 4.1 or 4.8 mm, a length of 8, 10 or 12 mm, a shoulder diameter of 4.8 mm and a supracrestal machined neck with a height of 1.8 or 2.8 mm (Straumann® Dental Implant System, Institut Straumann AG, Basel, Switzerland)
• •Full-ceramic
• •Utilization of prefabricated titanium abutments
• •Cemented (3M™ ESPE Ketac™ Cem, Seefeld, Germany) or screw-retained fixed dental prostheses with a mesial or distal cantilever extension (FDPCs)
• •Cantilever extension corresponding to 1 premolar unit (i.e., 6-7 mm)
• •Absence of occlusal contacts or guidance on the cantilever extension at baseline
• •Opposing dentition consisting of natural teeth or fixed or removable prosthetic restorations
• •Availability of a periapical radiograph at baseline (i.e. FDPC delivery)
• •Availability of PPD measurements (mm) taken at baseline at 4 sites/implant with a graduated Michigan periodontal probe (Deppeler SA, Rolle, Switzerland)
• •Availability of BoP measurements (%) (Lang et al., 1986) taken at baseline at 4 sites/implant with a graduated Michigan periodontal probe (Deppeler SA, Rolle, Switzerland).