Comparison of Early and Late Loading in the Edentulous Upper Jaw Using Cresco Prosthetic System on Straumann Implants
Study Details
Study Description
Brief Summary
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.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
Phase 4 |
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 Design
Arms and Interventions
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 |
Device: Cresco
Cresco components loading 10 days post surgery
|
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. |
Device: Cresco
Cresco loading at 6-8 weeks post surgery
|
Active Comparator: Straumann system late loading Straumann components loading at 6-8 weeks post surgery |
Device: Straumann components
Straumann components loading 6-8 weeks post surgery
|
Outcome Measures
Primary Outcome Measures
- Bone Level Change on Radiographs [3 years after loading]
Crestal bone level change at implant margin.The difference between baseline and 3 years after loading.
Eligibility Criteria
Criteria
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
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | STP Oral protetik | Kalmar | Sweden | 39185 | |
2 | Oral rehabilitering | Linköping | Sweden | 58185 |
Sponsors and Collaborators
- Institut Straumann AG
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
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- CR 02/04
Study Results
Participant Flow
Recruitment Details | |
---|---|
Pre-assignment Detail |
Arm/Group Title | Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading |
---|---|---|---|
Arm/Group Description | The implants must be restored (loaded) with a permanent screw retained fixed partial denture (FPD) at 10 days of post surgery | 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. | Straumann components loading at 6-8 weeks post surgery |
Period Title: Overall Study | |||
STARTED | 10 | 16 | 10 |
COMPLETED | 9 | 11 | 10 |
NOT COMPLETED | 1 | 5 | 0 |
Baseline Characteristics
Arm/Group Title | Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading | Total |
---|---|---|---|---|
Arm/Group Description | The implants must be restored (loaded) with a permanent screw retained fixed partial denture (FPD) at 10 days of post surgery | 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. | Straumann components loading at 6-8 weeks post surgery | Total of all reporting groups |
Overall Participants | 10 | 16 | 10 | 36 |
Age (Count of Participants) | ||||
<=18 years |
0
0%
|
0
0%
|
0
0%
|
0
0%
|
Between 18 and 65 years |
3
30%
|
9
56.3%
|
6
60%
|
18
50%
|
>=65 years |
7
70%
|
7
43.8%
|
4
40%
|
18
50%
|
Age (years) [Mean (Standard Deviation) ] | ||||
Mean (Standard Deviation) [years] |
64.1
(12.2)
|
64.2
(10.7)
|
67.1
(7)
|
65.1
(9.9)
|
Sex: Female, Male (Count of Participants) | ||||
Female |
3
30%
|
8
50%
|
9
90%
|
20
55.6%
|
Male |
7
70%
|
8
50%
|
1
10%
|
16
44.4%
|
Region of Enrollment (participants) [Number] | ||||
Sweden |
10
100%
|
16
100%
|
10
100%
|
36
100%
|
Outcome Measures
Title | Bone Level Change on Radiographs |
---|---|
Description | Crestal bone level change at implant margin.The difference between baseline and 3 years after loading. |
Time Frame | 3 years after loading |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading |
---|---|---|---|
Arm/Group Description | The implants must be restored (loaded) with a permanent screw retained fixed partial denture (FPD) at 10 days of post surgery | 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. | Straumann components loading at 6-8 weeks post surgery |
Measure Participants | 10 | 16 | 10 |
Mean (Standard Deviation) [mm] |
2.91
(0.7)
|
2.11
(0.64)
|
1.70
(0.94)
|
Adverse Events
Time Frame | ||||||
---|---|---|---|---|---|---|
Adverse Event Reporting Description | ||||||
Arm/Group Title | Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading | |||
Arm/Group Description | The implants must be restored (loaded) with a permanent screw retained fixed partial denture (FPD) at 10 days of post surgery | 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. | Straumann components loading at 6-8 weeks post surgery | |||
All Cause Mortality |
||||||
Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading | ||||
Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | |
Total | / (NaN) | / (NaN) | / (NaN) | |||
Serious Adverse Events |
||||||
Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading | ||||
Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | |
Total | 1/10 (10%) | 1/16 (6.3%) | 0/10 (0%) | |||
Blood and lymphatic system disorders | ||||||
Trombosis left leg | 1/10 (10%) | 1 | 0/0 (NaN) | 0 | 0/10 (0%) | 0 |
General disorders | ||||||
Death | 0/10 (0%) | 0 | 1/16 (6.3%) | 1 | 0/10 (0%) | 0 |
Psychiatric disorders | ||||||
Disoriented, depressed | 0/10 (0%) | 0 | 1/16 (6.3%) | 1 | 0/10 (0%) | 0 |
Other (Not Including Serious) Adverse Events |
||||||
Cresco Early Loading | Cresco Late Loading | Straumann System Late Loading | ||||
Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | |
Total | 0/10 (0%) | 0/16 (0%) | 0/10 (0%) |
Limitations/Caveats
More Information
Certain Agreements
Principal Investigators are NOT employed by the organization sponsoring the study.
There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.
Results Point of Contact
Name/Title | Kristina Espemar Holst, Senior Clinical Trial Manager |
---|---|
Organization | Straumann |
Phone | +41 61 965 11 11 |
info@straumann.com |
- CR 02/04