Risk factors for infraposition of implant-supported crowns in the upper front teeth
Official title: Risk Factors Associated With Infraposition of Single-tooth Implants in the Anterior Maxilla
Run by Region Västerbotten · NCT07593131 · Data updated 2026-11-12
This observational study looks at whether implant crowns in the upper front jaw end up sitting lower than neighboring teeth over time.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 60 (estimated) |
| Sponsor | Region Västerbotten Government |
| Locations | 2 sites (Stockholm and 1 other locations) |
| Status | Recruiting |
| Started | December 14, 2021 |
| Main results expected | December 14, 2036 |
| Study ends | December 14, 2036 |
| Registry record updated | May 18, 2026 |
| Trial ID | NCT07593131 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults over 18 who received an implant-supported crown in the anterior maxilla (from canine to canine) are eligible.
✕Probably not a fit
Patients without evidence of infraposition or with stable implants may derive no direct benefit from the study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This cohort study follows patients who received a single implant-supported crown in the anterior maxilla. Participants are followed with digital impressions at delivery and at 1, 3, 5, and 10 years to measure tooth movement relative to the implant crown. Digital models are superimposed to quantify infraposition and related changes in occlusion and alignment, alongside standard clinical and radiographic assessments. Data come from routine care at multiple public dental service centers in Västerbotten and Stockholm.
Why it matters
Potential benefit: If successful, findings could help clinicians anticipate and minimize infraposition to improve aesthetics and function.
How similar studies have gone: Prior work has explored implant-position stability, but long-term imaging-based tracking in this context is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: Patients over 18 years of age who had received an Implant Supported Single Crown in the anterior maxilla (canine to canine) were eligible for inclusion.
Where it's running
-
Department of Prosthodontics, Public Dental Health Service, Region Västerbotten
Umeå, Sweden Recruiting -
Prosthodontic Departments at Folktandvården Eastmaninstitutet
Stockholm, Sweden Terminated
Study contacts
- Principal investigator: Mattias Pettersson, DDS, PhD — Division of Prosthetic Dentistry, Department of Odontology, Faculty of Medicine, Umeå Uni-versity, Umeå, Sweden
- Study coordinator: Cecilia Turborn, DDS
- Email: cecilia.turborn@regionvasterbotten.se
- Phone: +46702104173
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.