Patellar DislocationTT-TG OutcomeNCT03076008
The Impact of Tibial Tubercle-trochlear Groove Distance and Patellar Height on the Outcome of Isolated Medial Patellofemoral Ligament Reconstruction
An observational study of Patellar Dislocation, run by University of Minnesota at 1 site in United States.
Trial summary
The investigators plan to perform a prospective observational cohort study of patients undergoing MPFL reconstruction for the treatment of episodic patellar instability in the absence of significant degenerative disease. Read more about this study
- Who is it for?
- Ages 13 to 90 years
- Conditions the study is for
- Patellar Dislocation
- What is being tested?
- Observational
- How many people
- 201 participants
- Where
- 1 siteUnited States
- Study dates
- 1 Oct 2016to 6 Oct 2026
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 13 to 90 years
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Patients undergoing MPFL reconstruction for patella instability
Who may be able to join
- MPFL Reconstruction
Who cannot join
- Trochleoplasty Required
- Prior ipsilateral knee surgery
- Iwano grade 2+
- CHondral injury requiring surgical treatment beyond debridement
- Major ligamentous injury to the knee
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Minnesota
Minneapolis, Minnesota, 55454
About this study
The investigators plan to perform a prospective observational cohort study of patients undergoing MPFL reconstruction for the treatment of episodic patellar instability in the absence of significant degenerative disease. The investigators will follow these study subjects for a minimum of two years to monitor their functional and clinical outcome.
- Conditions
- Patellar Dislocation
- Being tested
- Observational
- Medical subject headings
- Patellar Dislocation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ObservationalOther
No intervention
| Study group | Role | What they receive |
|---|---|---|
| MPFL Reconstruction | Subjects undergoing MPFL Reconstruction Receives: Other: Observational |
What is being measured
The primary outcome is the main question the study is designed to answer.
Recurrent Dislocation
Recurrent Dislocation
Measured: 2 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Mar 2017
- Study start1 Oct 2016
- Primary completion31 Mar 2023
- Study completion6 Oct 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Patellar DislocationStudies of the same condition, open and under way.
- More trials run by University of MinnesotaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 201 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Minnesota
- Sponsor type
- University, hospital or other
- Collaborators
- International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine, Ohio State University, OrthoSport Victoria
- Responsible party
- Sponsor
- Investigators
- Elizabeth Arendt, Principal investigator, University of Minnesota
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03076008
- Sponsor's protocol ID
- ORSU-2019-27540
- Acronym
- TT-TG Outcome
- Status last verified
- Oct 2026
- First submitted
- 6 Mar 2017
- Last updated
- 13 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided: We are currently undecided
Study at a glance
From the registry record, last updated by the sponsor on 13 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Impact of Tibial Tubercle-trochlear Groove Distance and Patellar Height on the Outcome of Isolated Medial Patellofemoral Ligament Reconstruction
- ClinicalTrials.gov ID
- NCT03076008
- Acronym / sponsor ID
- TT-TG Outcome / ORSU-2019-27540
- Conditions
- Patellar Dislocation
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 201 participants (actual)
- Lead sponsor
- University of MinnesotaUniversity, hospital or other
- Collaborators
- International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine, Ohio State University, OrthoSport Victoria
- Study start
- 1 Oct 2016 (actual)
- Primary completion
- 31 Mar 2023 (actual)
- Study completion
- 6 Oct 2026 (actual)
- First posted
- 9 Mar 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The investigators plan to perform a prospective observational cohort study of patients undergoing MPFL reconstruction for the treatment of episodic patellar instability in the absence of significant degenerative disease. The investigators will follow these study subjects for a minimum of two years to monitor their functional and clinical outcome.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| MPFL Reconstruction | – | Other: ObservationalSubjects undergoing MPFL Reconstruction |
Who may qualify
- Ages
- 13 to 90 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Patients undergoing MPFL reconstruction for patella instability
Key inclusion criteria (1 listed)
- MPFL Reconstruction
Key exclusion criteria (5 listed)
- Trochleoplasty Required
- Prior ipsilateral knee surgery
- Iwano grade 2+
- CHondral injury requiring surgical treatment beyond debridement
- Major ligamentous injury to the knee
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ObservationalNo intervention | Other | MPFL Reconstruction |
Primary outcome
Recurrent Dislocation
Time frame: 2 years
Recurrent Dislocation
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Oct 2026.
- Individual participant dataSharing planned: Undecided. We are currently undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Elizabeth Arendt principal investigator
University of Minnesota
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Patellar Dislocation, run by University of Minnesota at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 13 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Recurrent Dislocation (time frame: 2 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Oct 2026.