Kine-Mri in Patellofemoral Instability
- Conditions
- Affected and Unaffected Knee in Adoloescent
- Interventions
- Other: Dynamic kine-mri
- Registration Number
- NCT01890551
- Lead Sponsor
- Kuopio University Hospital
- Brief Summary
Purpose: The impact of kinematic-MRI (KINE-MRI) in the patellofemoral instability and anterior knee pain of the adolescents is rarely reported.Interest was to evaluate the patellofemoral joint biomechanics with KINE-MRI in adolescents with affected and unaffected knees in a case-control study.Methods: KINE-MRI was performed in 29 adolescents (affected knee group, AKG, n=29 and n=26 unaffected knee group, UAKG, n=26) aged 11-16 years with unilateral patellofemoral instability. For the control group invvestigators enrolled ten healthy age- and sex-matched volunteers (healthy knee group, HKG, n=19 ).The study parameters, Bisect Offset (BSO), Lateral Patellar Displacement (LPD), Patellar Tilt Angle (PTA), Sulcus Angle and Insall-Salvati ratio at 0, 10, 20 and 30 degrees of flexion-extension, were measured for the AKG patients (n=29), and UAKG patients (n=26) and the HKG subjects (n=19). Results: In a comparison between the AKG patients and the HKG subjects there was a significant difference in the BSO-ratio, LPD-test and PTA-test. In these parameters the difference between the AKG patients and the HKG subjects progressively increased towards the full extension of the knee. In the AKG and UAKG patients BSO-ratio at 0 degree ranged between 0.5 and 1.2 in both groups, whereas the BSO-ratio in the HKG subjects ranged between 0.33 and 0.75 (P \< .001). At the zero degree the LPD-test ranged between 0 and 10 mm in the AKG patients and between 0 and 35 mm in the UAKG patients, whereas the lateral displacement-test ranged between 0 and 5 mm in the HKG subjects (P = .003). Patellar tilt angle-test ranged between -30 and 20 degrees in the AKG patients and between -30 and 24 degrees in the UAKG patients and in the HKG subjects the PTA-test ranged between 10 and 24 degrees (P \< .001).Conclusion: The KINE-MRI could be a feasible method for the evaluation of patellar tracking in adolescents.
- Detailed Description
Purpose: The impact of kinematic-MRI (KINE-MRI) in the patellofemoral instability and anterior knee pain of the adolescents is rarely reported.Interest was to evaluate the patellofemoral joint biomechanics with KINE-MRI in adolescents with affected and unaffected knees in a case-control study.Methods: KINE-MRI was performed in 29 adolescents (affected knee group, AKG, n=29 and n=26 unaffected knee group, UAKG, n=26) aged 11-16 years with unilateral patellofemoral instability. For the control group investigators enrolled ten healthy age- and sex-matched volunteers (healthy knee group, HKG, n=19 ).The study parameters, Bisect Offset (BSO), Lateral Patellar Displacement (LPD), Patellar Tilt Angle (PTA), Sulcus Angle and Insall-Salvati ratio at 0, 10, 20 and 30 degrees of flexion-extension, were measured for the AKG patients (n=29), and UAKG patients (n=26) and the HKG subjects (n=19). Results: In a comparison between the AKG patients and the HKG subjects there was a significant difference in the BSO-ratio, LPD-test and PTA-test. In these parameters the difference between the AKG patients and the HKG subjects progressively increased towards the full extension of the knee. In the AKG and UAKG patients BSO-ratio at 0 degree ranged between 0.5 and 1.2 in both groups, whereas the BSO-ratio in the HKG subjects ranged between 0.33 and 0.75 (P \< .001). At the zero degree the LPD-test ranged between 0 and 10 mm in the AKG patients and between 0 and 35 mm in the UAKG patients, whereas the lateral displacement-test ranged between 0 and 5 mm in the HKG subjects (P = .003). Patellar tilt angle-test ranged between -30 and 20 degrees in the AKG patients and between -30 and 24 degrees in the UAKG patients and in the HKG subjects the PTA-test ranged between 10 and 24 degrees (P \< .001).Conclusion: The KINE-MRI could be a feasible method for the evaluation of patellar tracking in adolescents.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 50
- The inclusion criteria for the 29 patients were as follows: objective patellar instability with or without objective or episodic patellar dislocation, anterior knee pain for more than one year with positive apprehension tests, J-tracking of the patella, lateral tilt and displacement proven clinically.
- did not enroll any patients with the knee trauma, the previous surgery and the osteochondritic lesions.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description affected knee Dynamic kine-mri Interest was to evaluate the patellofemoral joint biomechanics with KINE-MRI in adolescents with affected and unaffected knees in a case-control study unaffected knee Dynamic kine-mri Interest was to evaluate the patellofemoral joint biomechanics with KINE-MRI in adolescents with affected and unaffected knees in a case-control study
- Primary Outcome Measures
Name Time Method Bisect Offset (BSO) One year BSO is the ratio of medial to lateral displacement of the patella (Brossmann et al. Radiology 1993).
- Secondary Outcome Measures
Name Time Method Lateral Patellar Displacement (LPD) One year LPD is the lateral displacement of the patella.
Patellar Tilt Angle (PTA) One year PTA measures the lateral tilting of the patella.
Sulcus Angle One year Sulcus Angle measures the angle formed by the medial and lateral borders of the trochlea
Insall-Salvati-ratio One year Insall-Salvati-ratio measures the ratio of the length of the patella to the length of the patellar ligament.
Trial Locations
- Locations (1)
Kuopio University Hospital
🇫🇮Kuopio, Northern Savo, Finland