The purpose of this study is to determine the survival rate, marginal bone resorption, soft tissue health and maintenance of the NobelActive Internal and External implants and to make comparisons with the NobelReplace Tapered Groovy implant placed in healed sites.

The purpose of this study is to determine safety and efficacy parameters for the NobelActive Internal and External implants and to make comparisons with the NobelReplace Tapered Groovy implant placed in healed sites.

Safety: AEs

Efficacy:

• survival rates,
• marginal bone resorption with marginal bone levels measurement,
• soft tissue health and maintenance via gingival index measurement, plaque index, papilla index .

Inclusion Criteria:

• The subject should be in need of an implant supported fixed restoration
• The subjects should have sufficient bone volume and density i.e. an osseous architecture in the planned implant placement region sufficient to receive implants with a diameter of 3.5 mm and a length of at least 10 mm.
• The subject as well as the implant sites should fulfill criteria for immediate functional tem-porization within 24 h.
• The implant sites should be healed and free from infection.

Exclusion Criteria:

• Alcohol or drug abuse as noted in patient records or in patient history.
• Health conditions, which do not permit the surgical procedure.
• Reason to believe that the treatment might have a negative effect on the subject's total situation (psychiatric problems), as noted in patient records or in patient history.
• The subject is not able to give her/his informed consent to participate.
• The need of bone augmentation before implant installation to obtain a prosthetically correct implantation transversally. However, a minor augmentation procedure to cover exposed threads or interproximal / buccal grafting due to deficient sites is not an exclusion criteria.
• Any disorders in the planned implant area such as previous tumors, chronic bone disease, or previous irradiation.
• Uncontrolled diabetics will be excluded.
• Severe bruxism or other destructive habits.
• Immediate insertion (e.g. placement of the implant immediately after extraction) consti-tutes an exclusion criterion.

Adverse events were recorded during the duration of the study with the 5-year follow up.

From implant insertion to 5 years follow-up 31 patient was lost to follow-up in NobelActive External group, 31 patient was lost to follow-up in NobelActive Internal group and 29 patient was lost to follow-up in NobelReplace group.