An observational study in Recurrent Patellar Dislocation, Patellar Instability and Patellofemoral Osteoarthritis, sponsored by Polish Mother Memorial Hospital Research Institute. Completed at 1 site in Poland. Open to participants aged 15 Years to 27 Years. Per ClinicalTrials.gov, last updated 2022-10-05.
Sponsored by Polish Mother Memorial Hospital Research Institute · Observational
Between 2010 and 2012, 33 children and adolescents (39 knees) with recurrent patellar dislocation were treated with MPFL reconstruction using the adductor magnus tendon.The aim of the study is to assess the effectiveness of this surgical procedure in long follow-up. The outcomes will be evaluated functionally (Lysholm knee scale, the Kujala Anterior Knee Pain Scale, and isokinetic examination) and radiographically (Caton-Deschamps index, sulcus angle, congruence angle, and patellofemoral angle). This is a continuation of the research published in 2015 with longer follow-up at least 10 years. All available patients will be evaluated with the same protocol, using the same methods and devices. Functional outcome is planned to be measured with scales as above. In radiological assessment Merchant and lateral knee weight bearing view and additionally MRI will be performed. Isokinetic test will be performed in two speeds of 60 and 180 deg/s. Most of important isokinetic parameters such as peak torque, torque in 30 deg, time to peak torque, peak torque to body weight both for quadriceps and hamstrings will be measured and compared to those from former research. Dedicated statistical test will be used for both: analysis of present status and differences from former results.
Recurrent dislocation of the patella is a common orthopaedic problem which occurs in about 44% of cases after first-time dislocation. In most cases of first-time patellar dislocation, the medial patellofemoral ligament (MPFL) becomes damaged. Between 2010 and 2012, 33 children and adolescents (39 knees) with recurrent patellar dislocation were treated with MPFL reconstruction using the adductor magnus tendon. The aim of the study is to assess the effectiveness of this surgical procedure in long follow-up. The outcomes will be evaluated functionally (Lysholm knee scale, the Kujala Anterior Knee Pain Scale, and isokinetic examination) and radiographically (Caton-Deschamps index, sulcus angle, congruence angle, and patellofemoral angle). This is a continuation of the research published in 2015 with longer follow-up at least 10 years. All available patients will be evaluated with the same protocol, using the same methods and devices. Functional outcome is planned to be measured with scales as above. In radiological assessment Merchant and lateral knee weight bearing view and additionally MRI will be performed. Isokinetic test will be performed in two speeds of 60 and 180 deg/s. Most of important isokinetic parameters such as peak torque, torque in 30 deg, time to peak torque, peak torque to body weight both for quadriceps and hamstrings will be measured and compared to those from former research. Dedicated statistical test will be used for both: analysis of present status and differences from former results.
41 studies on the registry are indexed under Patellar Dislocation; 9 are open to participants now.
This study's enrollment of 22 is below the median of 100 across 15 observational studies indexed under Patellar Dislocation.
Browse Patellar Dislocation studies →Polish Mother Memorial Hospital Research Institute is the lead sponsor of 19 studies on the registry; 6 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Study population consists of 33 patients (39 knees operated) after abductor magnus tenodesis for recurrent patellar dislocation with age under 18 at the time of surgery. With follow-up at least 10 years, present age of the subjects between 15 and 27 years.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
33 children and adolescents (39 knees) with recurrent patellar dislocation were treated with MPFL reconstruction using the adductor magnus tendon between 2010 and 2012. The group is under clinical observation with evaluation being made.
Procedure: Adductor magnus tenodesis for recurrent patellar dislocation
In all 33 patients (39 knees) adductor magnus tenodesis was performed to stabilise the patella. Adductor magnus tendon was harvested, cut proximally and fixed to the patella with proper tension.
Apprehension test
Fear during patellar passive lateralisation
Time frame: up to six months
Lysholm Score
Subjective outcome evaluation scale
Time frame: up to six months
Kujala Score
Subjective outcome evaluation scale
Time frame: up to six months
Sulcus angle
Index describing trochlear shape
Time frame: up to six months
Congruence angle
Index describing patellar shift
Time frame: up to six months
Patellofemoral angle
Index describing patellar tilt
Time frame: up to six months
Caton-Deschamps index
Index describing patellar height
Time frame: up to six months
Peak torque
Isokinetic evaluation in speeds 60 and 180 degree per second, both for quadriceps and hamstrings, Units of Measure - Newton-Metre (Nm)
Time frame: up to six months
Torque in 30 deg
Isokinetic evaluation in speeds 60 and 180 degree per second, both for quadriceps and hamstrings, Units of Measure - Newton-Metre (Nm)
Time frame: up to six months
Time to peak torque
Isokinetic evaluation in speeds 60 and 180 degree per second, both for quadriceps and hamstrings, Units of Measure - seconds (s)
Time frame: up to six months
Peak torque to body weight
Isokinetic evaluation in speeds 60 and 180 degree per second, both for quadriceps and hamstrings, Units of Measure - Nm/kg
Time frame: up to six months
Plan to share: Yes — We will be ready to share our data upon reasonable request of other researchers.
Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report, Analytic code
Time frame: 2022-2030
Access criteria: Upon reasonable request krzynormal@wp.pl
No publications or documents are linked to this record.
Ran from Nov 2021 to primary completion in Sep 2022, 9 months.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Nov 2021. 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.
Polish Mother Memorial Hospital Research Institute