Study to Evaluate Implant Survival Rate of Astra Tech Fixture ST in the Posterior Maxilla With One-stage Surgery and Early Loading

Exclusion Criteria

• •Bone height \< 5 mm, in the planned implant area
• •Bone width \< 5 mm, in the planned implant area
• •Previous bone augmentation procedure in the planned implant area
• •Previous failures of endosseous implants
• •Untreated caries and/or periodontal disease of residual dentition
• •History or presence of any systemic or local disease or condition that would compromise post-operative healing and/or osseointegration
• •Systemic corticosteroids or any other medication that would compromise post-operative healing and/or osseointegration
• •Current alcohol or drug abuse
• •Unable or unwilling to return for follow-up visits for 3 years