4 mm Implants in Fixed Cross-Arch Prostheses

Inclusion Criteria: * Males and females with at least 18 years of age (including 18 years) * Subject must have voluntarily signed the informed consent, are willing and able to attend scheduled follow-up visits, and agree that the encoded data will be collected and analyzed * Fully edentulous (latest extraction in the mandible should be performed at least 12 weeks before implant placement) that can be restored with a complete denture * Atrophic jaw bone in the posterior area, sufficient bone height and width to permit insertion of four short implants, 4 mm in regions of the first molar and second premolar on both sides and two standard length implants in the canine region Exclusion Criteria: * Patients with inadequate bone volume and/or quality * Uncontrolled systemic disease that would interfere with dental implant therapy (e.g. uncontrolled diabetes) * Any contraindications for oral surgical procedures * History of local irradiation therapy in the head / neck area * Patients who smoke \>10 cigarettes per day or tobacco equivalents, chew tobacco or have ≥ 20 pack years * Medical conditions requiring chronic high dose steroid therapy or high dose anti-resorptive treatment * Subjects who have undergone administration of any investigational device within 30 days of enrollment in the study * Conditions or circumstances, in the opinion of the investigator, which would prevent completion of study participation or interfere with analysis of study results, such as history of non-compliance or unreliability * Cognitive impairment that would interfere with the ability to perform adequate oral hygiene (assessed by the Ottawa 3DY scale) * Patients with chronic pain * Patients with HIV and/ or Hepatitis infection * Severe bruxing or clenching habits * Patients with inadequate oral hygiene or unmotivated for adequate home care (Denture Plaque Index (DPI) ≥ 5) * Patients with drug or alcohol abuse * Patients with allergies or hypersensitivity to chemical ingredients of titanium-zirconium alloy * Major simultaneous augmentation procedures. Dehiscence of a vertical distance of more than 3 mm * A woman who is pregnant or planning to become pregnant at any point during the study duration Secondary Exclusion Criteria: * Patients with inadequate bone volume and/or quality