The main aim of this clinical trial is to analyze the survival rate of short-length implants (<4.5 mm) in partial edentulism subjects. 6.5 mm length implants will be used as control arm. Additionally, others clinical parameters (marginal bone loss and prosthetic associated complications) will be measured.

Inclusion Criteria:

• Age ≥ 18 years
• Clinical indication to place a prosthetic bridge supported by a maximum of 4 implants in the posterior sectors
• Bone height in the area of interest sufficient to place implants 6.5mm length dental implants
• Availability to be observed during the follow-up period
• Signature of the informed consent

Exclusion Criteria:

• Need to perform bone augmentation surgery prior to implant placement surgery
• Smokers (> 10 cigarettes per day)
• Patients with poorly controlled diabetes
• Patients on chronic treatment with non-steroidal anti-inflammatory drugs
• Patients receiving oral or intravenous bisphosphonates
• Patients under chemotherapy or radiotherapy treatment
• Patients receiving systemic corticosteroids