Short vs Long Dental Implants for the Fixed Rehabilitation of the Fully Edentulous Mandible

Inclusion Criteria: * total edentulous patients in the lower region since at least 8 months, * sufficient amount of native bone (no augmentation procedures) in the recipient sites to allow ≥11 mm long and 4 mm wide implant installation (≥1 mm of peri-implant bone circumferentially) * systemic health * compliance with good oral hygiene * informed consent signed. Exclusion Criteria: * any disease, medication or drug that could jeopardize healing, osseointegration or treatment outcome, * untreated caries or periodontitis of the remaining teeth, * mucosal and bone tissue lesions, * severe bruxism or other parafunction habits, * unrealistic aesthetic demands, * patient taking part to another study