Sponsor and principal investigator decision

This study aims to compare the therapeutic efficiency of implant-secured removable partial denture (PASI) with the therapeutic efficiency of the metalic standard removable partial denture (PAC) in the treatment of intermediate extended-gap (4 adjacent teeth). The therapeutic efficiency will be assessed by the 5 years-prosthetic success rate.

Inclusion Criteria:

• Patients with at least a 4 to 6 adjacent teeth intermediate extended-gap (excluding wisdom teeth) in the upper or lower jaw.
• Patients with at least 4 conservable teeth by dental arch, without major occlusal trouble.
• Patients with healthy periodontium, allowing metalic standard removable partial denture delivery : bleeding on periodontal probing for a duration less than 30 seconds, Osteolysis of the alveolar ridge less or equal to 50%, attachment loss less or equal to 5mm
• Patients with a sufficient bone volume for implant placement, without prior bone supply.

Exclusion Criteria:

• Patients with general counter-indications for implant placement.
• Patients suffering from a titanium allergy.
• Patients with an insufficient oral and dental hygiene - Patients smoking ten or more cigarettes per day.
• Patients with teeth extended-gap, which could be corrected by a fixed tooth-supported denture.
• Patient with an insufficient available bite level to deliver an attachment system (< 7mm).
• Patients with a severe generalized chronic periodontitis , an aggressive periodontitis or a periodontitis unresponsive to treatment.
• Women who have reported to be pregnant.
• Patients deprived of liberty