- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00922935
Comparison of Early and Late Loading in the Edentulous Upper Jaw Using Cresco Prosthetic System on Straumann Implants
March 3, 2016 updated by: Institut Straumann AG
A 3 Arm Controlled Randomised Study: Comparison of Early and Late Loading Protocols in Full Arch Reconstructions in the Edentulous Maxilla, Using The Cresco Prosthetic System on Straumann Implants
Comparison of early and late loading of implants supporting full each prosthesis in upper jaw, using the Cresco prosthetic system on Straumann implants.
The study hypothesis is that there is no difference between the bone loss (or gain) between the groups.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
The study is a controlled randomised study whereby each patient will receive 5-6 implants placed in the edentulous upper jaw supporting a 10-12 unit screw-retained fixed partial denture (FPD).
The main objective of the study is to evaluate the performance of Straumann implants supporting a FPD using Straumann Implants and Cresco restorative components in early and delayed loading protocols at one year post-loading.
The treatment groups consist of an early loading and delayed loading arm using Cresco restorative components loading time 10 days post surgery and at 6-8 weeks respectively.
The control group comprise the standard delayed loading protocol (healing period 6-8 weeks) and Straumann restorative components.
The primary objective is to compare changes in crestal bone levels on radiographs between implants in the control group and test groups at 1 year.The patients will be followed for 3 years.
Study Type
Interventional
Enrollment (Actual)
36
Phase
- Phase 4
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Kalmar, Sweden, 39185
- STP Oral protetik
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Linköping, Sweden, 58185
- Oral rehabilitering
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Males and females must be at least 18 years of age.
- Be edentulous in the maxilla and subjectively desire an implant supported screw retained FPD
- The teeth at the implant site must have been extracted or lost at least 3 months before the date of implantation.
- In the case of Guided Bone Regeneration(GBR) or Guided Tissue Regeneration (GTR) treatments, these procedures must have been completed at least 6 months prior to intended surgery date (to fulfil point 5).
- Adequate bone quality and quantity at the six, minimum five, implant sites to permit the insertion of Straumann 4.1 and 3.3 mm diameter implants without the use of concurrent bone augmentation techniques. I.e. implant insertion sites must have sufficient bone height such that the implant will not encroach on vital structures and sufficient width that a minimum of 1 mm of palatal and buccal bone will remain.
- Patients must be committed to participate in the study for three years follow-up examinations
Exclusion Criteria:
- Presence of conditions requiring chronic routine prophylactic use of antibiotics (e. g., history of rheumatic heart disease, bacterial endocarditis, cardiac valvular anomalies, prosthetic joint replacements)
- Medical conditions requiring prolonged use of steroids
- History of leukocyte dysfunction and deficiencies
- History of bleeding disorders
- History of neoplastic disease requiring the use of radiation or chemotherapy
- Patients with history of renal failure
- Patients with metabolic bone disorders
- History of uncontrolled endocrine disorders
- Physical handicaps that would interfere with the ability to perform adequate oral hygiene
- Use of any investigational drug or device within the 30-day period immediately prior to implant surgery on study day 0.
- Alcoholism or drug abuse
- Patients infected with HIV
- Patients who smoke more than 10 cigarettes per day or cigar equivalents, or who chew tobacco (not greater than 10 cigarette equivalents)
- Conditions or circumstances, in the opinion of the investigator, which would prevent completion of study participation or interfere with analysis of study results, such as history of non-compliance, unreliability.
- Local inflammation, including untreated periodontitis
- Mucosal diseases such as erosive lichen planus
- History of local irradiation therapy
- Presence of osseous lesions
- Unhealed extraction sites (less than 3 months post extraction of teeth in intended sites)
- Bone surgery (bone grafts, guided tissue regeneration technique for bone enhancement) at implant placement.
- Severe bruxing or clenching habits
- Persistent intraoral infection
- Patients with inadequate oral hygiene or unmotivated for adequate home care
- Lack of primary stability of 1 or more implant(s) at surgery. In this instance the patient must be withdrawn and treated accordingly.
- Insufficient bone
- Other: Inability to place implants according to protocol requirements
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Cresco early loading
The implants must be restored (loaded) with a permanent screw retained fixed partial denture (FPD) at 10 days of post surgery
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Cresco components loading 10 days post surgery
Cresco loading at 6-8 weeks post surgery
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Experimental: Cresco late loading
Healing caps will be placed until loading.
The minimum waiting time is 4 weeks, but not before "try ins" to ensure a perfect fit.
The implants must be restored (loaded) with a permanent screw retained fixed partial denture (FPD) within 42-56 days (6 to 8 weeks) of surgery.
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Cresco components loading 10 days post surgery
Cresco loading at 6-8 weeks post surgery
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Active Comparator: Straumann system late loading
Straumann components loading at 6-8 weeks post surgery
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Straumann components loading 6-8 weeks post surgery
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Bone Level Change on Radiographs
Time Frame: 3 years after loading
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Crestal bone level change at implant margin.The difference between baseline and 3 years after loading.
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3 years after loading
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Stefan Ellner, DDS, PhD, STP Oral protetik, Kalmar, Sweden
- Principal Investigator: Asbjorn Jokstad, Professor, University of Toronto, Faculty of Denistry, 124 Edward Street, Toronto
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
October 1, 2004
Primary Completion (Actual)
February 1, 2009
Study Completion (Actual)
September 1, 2009
Study Registration Dates
First Submitted
June 16, 2009
First Submitted That Met QC Criteria
June 16, 2009
First Posted (Estimate)
June 17, 2009
Study Record Updates
Last Update Posted (Estimate)
March 31, 2016
Last Update Submitted That Met QC Criteria
March 3, 2016
Last Verified
March 1, 2016
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- CR 02/04
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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