This trial is active, not recruiting.

Condition dental implants
Treatments 1 implant, 2 implants
Sponsor University of Zurich
Start date July 2012
End date December 2018
Trial size 34 participants
Trial identifier NCT01649531, 2012-0097


The aim of the present study is to test whether there is a difference in the marginal bone level change between implants with and without cantilevers.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Intervention model parallel assignment
Primary purpose supportive care
Masking no masking
(Active Comparator)
1 Implant, to be placed in the position with greater vertical bone height with a mesial or distal cantilever.
1 implant
(Active Comparator)
2 Implants
2 implants

Primary Outcomes

radiographic bone level
time frame: 5 years

Secondary Outcomes

Radiographic bone level
time frame: 1 and 3 years
Implant survival and success
time frame: 1, 3, 5 years
rate of technical complication
time frame: 1, 3, 5 years
rate of biological complications
time frame: 1, 3, 5 years
Soft tissue changes
time frame: 1, 3, 5 years
Patient morbidity
time frame: 1, 3, 5 years

Eligibility Criteria

All participants from 18 years up to 80 years old.

Inclusion Criteria: - male and female patients 18 years to 80 years of age - no general medical condition which represents a contraindication to implant treatment - two adjacent missing teeth in the maxilla or mandible in positions of premolars and molars - at least one tooth present adjacent to the edentulous space - indication for implant treatment is given - at least 8 mm of vertical bone height in the mandible allowing for the placement of a 6 mm implant (2 mm safety distance to inferior alveolar nerve) - at least 4 mm of vertical bone height in the maxilla - signed informed consent after being informed Exclusion Criteria: - smoking of more than 15 cigarettes a day (clinical studies show an increased failure rate of implants in heavy smokers) - poor oral hygiene after hygienic phase (Plaque Index over 30 %) - active periodontal disease - pregnancy or breastfeeding at date of inclusion

Additional Information

Principal investigator Daniel Thoma, PD Dr.
Trial information was received from ClinicalTrials.gov and was last updated in February 2017.
Information provided to ClinicalTrials.gov by University of Zurich.