Study on Short Implants (OsseoSpeed™) Compared to Standard Length Implants (OsseoSpeed™) With Bone Substitution

Inclusion Criteria:

• Provision of informed consent
• Aged 20-75 years at enrolment
• History of edentulism in the study area of at least four months
• In need for 1-4 implants in either side of the posterior maxilla (premolar and molar region)
• Neighboring tooth/teeth to the planned implant/s must have natural root(s) or implant supported restoration, with absence of pathology or excessive bone loss, as judged by the investigator
• Presence of natural tooth/teeth, partial prosthesis and/or implants in the opposite jaw in contact with the planned crown/s
• Deemed by the investigator to have a bone height between 5 and 7 mm and a bone width of a minimum of 6 mm
• Deemed by the investigator as likely to present an initially stable implant situation

Exclusion Criteria:

• Unlikely to be able to comply with study procedures, as judged by the investigator
• Earlier bone 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, iv bisphosphonates or any other medication that could influence post-operative healing and/or osseointegration
• Smoking more than 10 cigarettes/day
• Bruxism
• 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
• Simultaneous participation in another clinical study