Untreated caries and/or periodontal disease of residual dentition

Need for pre-surgical bone or soft tissue augmentation in the planned implant area/s.

Absence of occlusal stability in centric occlusion

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

Pregnancy

Present alcohol or drug abuse

Tobacco smoking during the last 6 months

Unable or unwilling to return for follow-up visits for a period of 3 years

Study to Compare Marginal Bone Loss Around Implants From Two Dental Implant Systems.