Narrow Dental Implants in Multiple Fixed Prosthesis: A Controlled Clinical Trial

Inclusion Criteria: * Patients of legal age (\>18 years) of both sexes. * Clinical need of multiple fixed alveolar ridge rehabilitations. * Clinical suitability to insert, at least, one narrow dental implant splinted to a standard diameter dental implant. * Signature of the informed consent Exclusion Criteria: * Presence of an active infection * Being under active treatment with, or have received in the las 30 days treatment with radiotherapy, chemotherapy, immunosuppressors, systemic corticosteroids and/or anticoagulants. * Presence of severe haematologic disorders. * Chronic treatment with non steroidal anti-inflammatory drugs (NSAID) or other aniinflammatory drugs. * Previous diagnosis of chronic hepatitis or liver cirrhosis. * Presence of Diabetes mellitus with improper metabolic control (glycosylated haemoglobine higher that 9%). * Patients subjected to dialysis. * Presence of malignant tumours, haemangioma or angioma in the surgical area. * History of ischaemic cardiopathy in the las year. * Pregnancy or plan to getting pregnant during the study. * Metabolic bone disease * Patientd receiving treatment with oral or intravenous biphosphonates. * Any other condition incompatible with the participation in the study,