Inclusion Criteria:  Age 18+ Patients with partial edentulism in the posterior region (4-7) upper or lower for at least 3 months Patient whose tomographic examination shows adequate bone volumes for computer guided placement of a standard diameter implant (> 3.5 mm) without the need for bone regeneration procedures Patients who have accepted informed consent and participation in the study Patients who do not have exclusion criteria  Eclusion Criteria  Patients who refuse to co-operate  Systemic conditions of exclusion:  Medical conditions requiring prolonged use of steroids Severe hemophilia In therapy with intravenous bisphosphonates History of white blood cell dysfunction or deficiency History of head and neck radiotherapy or chemotherapy History of kidney failure Pregnant or breastfeeding patient History of uncontrolled endocrine disorders Physical handicaps that hinder proper oral hygiene Use of experimental devices or drugs within 30 days prior to implant placement surgery Alcoholism or drug abuse Smokers of> 10 cigarettes per day or the equivalent cigar or> 10 tobacco-based chewings per day Conditions or circumstances that prevent the completion of participation in the study or interfere with the analysis of the study results  Local exclusion conditions:  Local inflammation, including untreated periodontitis Patients with erosive lichen planus History of local radiation therapy Presence of bone lesions Unhealed extraction sites History of bone reconstruction and bone grafting techniques in the sites where the implants are to be inserted Bruxism Bleeding index> 30% and number of pockets> 5mm greater than 10