Comparing 7 mm and 5 mm Implants Placed Immediately After Molar Extraction

Inclusion Criteria: * at least 18 years old * able to sign an informed consent form * requiring at least one immediate post-extractive implant in first and/or second molar sites * sufficient bone to allow placement of an immediate implant at least 7 mm in length and 7 mm in diameter Exclusion Criteria: * general contraindications to implant surgery * immunosuppressed or immunocompromised * irradiation in the head or neck area * uncontrolled diabetes * pregnancy or lactation * untreated periodontitis * poor oral hygiene and motivation * addiction to alcohol or drugs * psychiatric disorders * unrealistic expectations * acute infection (abscess) in the site intended for implant placement * necessity to lift the maxillary sinus epithelium * unable to commit to 5-year follow-up post-loading * under treatment or had previous treatment with intravenous amino-bisphosphonates * lack of bony wall completely surrounding the future implant * participation in other studies interfering with present protocol.