Clinical Trials Logo

Clinical Trial Summary

For severe recurrent patellar dislocation with poor patellar maltracking, derotation osteotomy is an effective clinical treatment. However, derotation osteotomy requires very high requirements for the surgeon. It is necessary to determine the osteotomy surface, control the axis and complete internal fixation in three dimensions. The deviation of the osteotomy surface may cause deformities such as postoperative knee valgus, knee hyperextension, or restricted extension. The hypothesis of this study is to design a 3D osteotomy template for derotation osteotomy with the aid of computer-assisted simulated surgery. Compared with traditional osteotomy, it can effectively improve the treatment effect of recurrent patellar dislocation due to poor patellar maltracking. The incidence of postoperative knee valgus shortens the operation time and reduces the number of intraoperative fluoroscopy. This study intends to adopt a randomized controlled study, and the selection criteria are adolescent patients with recurrent patellar dislocation, aged >14 years, with a positive J sign. The experimental group used mimics 20.0 software to reconstruct the three-dimensional model of the patient based on the full-length images of the lower limbs in the weight-bearing position and the CT of the hip, knee and ankle before the operation. The osteotomy template was designed and 3D printing technology was used to make the osteotomy template for intraoperative osteotomy. The control group used traditional de-rotation techniques. The knee joint range of motion, patella stability, residual rate of J-sign, knee valgus angle, femoral anteversion angle, gait analysis, etc. were compared between the two groups after surgery, and the differences between the two surgical techniques were evaluated


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT04556799
Study type Interventional
Source Beijing Jishuitan Hospital
Contact Zhijun Zhang, M.D.
Phone +86 15201277648
Email zzj5285029@163.com
Status Not yet recruiting
Phase N/A
Start date October 1, 2020
Completion date June 30, 2023

See also
  Status Clinical Trial Phase
Active, not recruiting NCT03664791 - Vanguard Rocc Post Market Surveillance
Terminated NCT00209560 - A Study of AQUAVAN® Injection in the Presence of Pre-Medication in Patients Undergoing Minor Surgical Procedures Phase 3
Completed NCT03487497 - Gait Analysis During Level and Uphill Walking After Lengthening Osteotomy of the Lateral Column
Completed NCT03388736 - Anxiolytic Effect of Lavender Oil on Orthognathic Surgery Patients N/A
Recruiting NCT04894578 - A Comparative Trial of a Minimal-invasive Technique Versus Open Arthrodesis in the Treatment of Midfoot Arthritis N/A
Not yet recruiting NCT06338982 - Fracture Pattern Following Bilateral Sagittal Split Osteotomy With or Without Impacted Third Molars N/A
Active, not recruiting NCT04653051 - PMCF Study on the Safety, Performance and Clinical Benefits of the DVR Plating System
Not yet recruiting NCT06250530 - Comparison Between TOMOFIX and BodyCAD Fine Osteotomy N/A
Completed NCT04000672 - Patient Specific Instrumentation (PSI) Referencing Osteotomy Technological Transfer - a Randomized Control Trial (RCT) N/A
Recruiting NCT05362864 - ZNN Bactiguard Cephalomedullary Nails PMCF Study
Recruiting NCT05339360 - ZNN Bactiguard Antegrade Femoral Nails PMCF Study
Completed NCT04425369 - Iliac Crest Bone Graft Harvesting for Pediatric Pelvic Osteotomy N/A
Enrolling by invitation NCT04376801 - A Retrospective Study on the Outcome of Different Fixation Methods After Olecranon Osteotomy
Recruiting NCT05461118 - Osteotomy Accuracy Using Mixed Reality Assisted Navigation N/A
Completed NCT04109469 - Shark Screw® - Hand- and Foot Surgery Study