An observational study in Patellar Instability and Patellar Dislocation, sponsored by Ramsay Générale de Santé. Completed at 1 site in France. Per ClinicalTrials.gov, last updated 2019-03-20.
Sponsored by Ramsay Générale de Santé · Observational
Patellar instability (recurrent patellar dislocation) can occur at any age. It is most often seen in young subjects, especially among adolescents. It is commonly accompanied by anatomical factors. A new factor not described in bibliographic sources and characterized by an external torsion of the tibial tuberosity is frequently found in patients with patellar instability thanks to MRIs. This does not seem to be the case when there is no patellar pathology. A statistical study is needed to assess this rotary anomaly. Validate the predictive benefits when measuring the torsion of tibial tuberosity in cases with recurrent patellar dislocation.
Patellar instability (recurrent patellar dislocation) can occur at any age. It is most often seen in young subjects, especially among adolescents. It is commonly accompanied by anatomical factors known to be driving: Dysplasia of the trochlea, patella alta, lateralisation of the tibial tuberosity, patellar torsion and misalignment, tearing of the Medial Patello Femoral Ligament... The assessment of these factors is essential to evaluate the instability and guide the procedures of the surgical treatment. MRIs have become an important test for the analysis and measurement of these factors. A new factor not described in bibliographic sources and characterized by an external torsion of the tibial tuberosity is frequently found in patients with patellar instability thanks to MRIs. This does not seem to be the case when there is no patellar pathology. A statistical study is needed to assess this rotary anomaly. It will be necessary to take it into account in the future regarding indications and techniques for tibial tuberosity osteotomies, often used to correct patellar instability.
group of patients with patellar instability stemming from a recurrent patellar dislocationand a control group that has not been checked for patellar instability.
Clinical criteria:
Unstable group:
Control group:
Exclusion Criteria:
Unstable group:
Control group:
Group of patients with patellar instability stemming from a recurrent patellar dislocation
Group that has not been checked for patellar instability.
Existence of Tibial Tuberosity Torsion.
This criteria will be considered relevant if it is associated with patellar dislocation. Existence Yes or No and measure of the torsion in degre on the IRM
Time frame: 4 reviewers Assessment of 92 IRM of patients. Study data collection from April 2010 until december 2016. Patient duration follow up not applicable.
Measure of Patellar Tilt
Patellar Tilt (yes or no), based on a patient IRM. Unit in degre.
Time frame: 4 reviewers Assessment of 92 IRM of patients. Study data collection from April 2010 until december 2016. Patient duration follow up not applicable. Unit in degre
Distance TT-TG Tibial Tuberosity and Trochlear Groove
distance between Tibial Tuberosity and Trochlear Groove
Time frame: 4 reviewers Assessment of 92 IRM of patients. Study data collection from April 2010 until december 2016. Patient duration follow up not applicable.
| Milestone | Patellar Instability Group | Control Group Control |
|---|---|---|
| Started | 37 | 55 |
| Completed | 37 | 55 |
| Not completed | 0 | 0 |
This criteria will be considered relevant if it is associated with patellar dislocation. Existence Yes or No and measure of the torsion in degre on the IRM
| degre | Patellar Instability Group | Control Group Control |
|---|---|---|
| Existence of Tibial Tuberosity Torsion. | 17.5 (13.0 to 23.9) | 5.3 (3.4 to 8.4) |
Patellar Tilt (yes or no), based on a patient IRM. Unit in degre.
| degre | Patellar Instability Group | Control Group Control |
|---|---|---|
| Measure of Patellar Tilt | 19.8 (13.8 to 27.6) | 5.3 (2.5 to 8.2) |
distance between Tibial Tuberosity and Trochlear Groove
| milimeters | Patellar Instability Group | Control Group Control |
|---|---|---|
| Distance TT-TG Tibial Tuberosity and Trochlear Groove | 17 (12.2 to 20.1) | 8.4 (6.7 to 9.8) |
Collected over Not Applicable. Study consist in IRM reading. NO adverse events has been collected. Not applicable, retrospective study based on available IRM. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Patellar Instability Group | — | — | — |
| Control Group Control | — | — | — |
| Age, Categorical(Participants) | Patellar Instability Group | Control Group Control | Total |
|---|---|---|---|
| <=18 years | 1 | 1 | 2 |
| Between 18 and 65 years | 36 | 53 | 89 |
| >=65 years | 0 | 1 | 1 |
| Age, Continuous(years) | Patellar Instability Group | Control Group Control | Total |
|---|---|---|---|
| mean | 28.6 ± 10.7 | 46 ± 14 | 39 ± 15.4 |
| Sex: Female, Male(Participants) | Patellar Instability Group | Control Group Control | Total |
|---|---|---|---|
| Female | 23 | 19 | 42 |
| Male | 14 | 36 | 50 |
| Race and Ethnicity Not Collected(Participants) | Patellar Instability Group | Control Group Control | Total |
|---|---|---|---|
| Count of participants | — | — | 0 |
| Region of Enrollment(participants) | Patellar Instability Group | Control Group Control | Total |
|---|---|---|---|
| France | 37 | 55 | 92 |
Plan to share: No
This study is completed, as verified in Feb 2018. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Ramsay Générale de Santé