Study on OsseoSpeed™ TX Narrow Implants in the Lower Jaw in a Chinese Population

Inclusion criteria: 1. Provision of informed consent 2. Aged 20-75 years at enrolment 3. History of edentulism in the study area of at least two months 4. Presence of natural teeth, partial prosthesis and/or implants in the opposite jaw in contact with the planned crowns 5. Deemed by the investigator to have a bone height and width suitable for 3.0 mm diameter study implant 6. Deemed by the investigator as likely to present an initially stable implant situation Exclusion Criteria: 1. Unlikely to be able to comply with study procedures, as judged by the investigator 2. Uncontrolled pathologic processes in the oral cavity 3. Known or suspected current malignancy 4. History of radiation therapy in the head and neck region 5. History of chemotherapy within 5 years prior to surgery 6. Systemic or local disease or condition that could compromise post-operative healing and/or osseointegration, as deemed by the investigator 7. Uncontrolled diabetes mellitus 8. Corticosteroids or any other medication that could influence post-operative healing and/or osseointegration 9. Smoking more than 10 cigarettes per day 10. Present alcohol and/or drug abuse 11. Involvement in the planning and conduct of the study (applies to both Astra Tech staff and staff at the study site) 12. Previous enrollment in the present study 13. Simultaneous participation in another clinical study, or participation in a clinical study during the last weeks prior to enrollment