Study Comparing OsseoSpeed™ Implants of Two Different Lengths in the Upper and Lower Posterior Jaw

Exclusion Criteria

• •Unlikely to be able to comply with study procedures, as judged by the investigator
• •Earlier graft procedures in the study area
• •Uncontrolled pathologic processes in the oral cavity
• •Known or suspected current malignancy
• •History of radiation therapy in the head and neck region
• •History of chemotherapy within 5 years prior to surgery
• •Systemic or local disease or condition that could compromise post-operative healing and/or osseointegration
• •Uncontrolled diabetes mellitus
• •Corticosteroids or any other medication that could influence post-operative healing and/or osseointegration
• •Smoking more than 10 cigarettes/day
• •Present alcohol and/or drug abuse
• •Involvement in the planning and conduct of the study (applies to both Astra Tech staff and staff at the study site)
• •Previous enrolment in the present study.
• •Severe non-compliance to protocol as judged by the investigator and/or Astra Tech
• •Simultaneous participation in another clinical study, or participation in a clinical study during the last 6 months