Correction Angle Planning Using ZedKnee／ZedOsteotomy for Knee Osteotomy
Objective
In HTO for varus knee cases, quantitatively evaluate lower limb alignment and correction angle preoperatively.
Subjects
- Cases: 12 cases, 12 joints
- Sex: 3 male, 9 female
- Diagnosis: Varus knee osteoarthritis
Evaluation Items
- Lower limb alignment (FTA, MPTA)
- Osteotomy line and correction angle
- Discrepancy between the preoperative plan and postoperative alignment
Results
Based on the preoperative plan, correction to the target lower limb alignment was achieved with high precision.
Discussion
3D correction angle planning reduced variability between surgeons and enabled highly reproducible surgical planning.
ZedKnee
Overview
Supports preoperative planning for total/unicompartmental knee arthroplasty (TKA/UKA) and high tibial osteotomy (HTO) around the knee. Lower limb alignment measurement and implant sizing can be performed in 3D.
ZedKnee creates 3D models of the bone using CT data, and supports planning and assessing TKA (Total Knee Arthroplasty) and UKA (Unicompartmental Knee Arthroplasty).
User can perform surgical simulations (such as positioning of implants, calculation of parameters, etc.) in simple steps, and also calculate ROM (Range Of Motion) of the knee.
Features
- Intuitive operation on the 3D model
- Templates based on extensive installation experience
- Report output for sharing surgical records
Database of Patient Records
User can import CT data (in DICOM format) into a database application.
Patient information (such as name, sex, date of birth, etc.) can be managed uniformly.
Positioning of Implants
User can select femoral and tibial components from a library of commercially-available implants.
Implants can be placed at optimal positions on 3D model and MPR (multi-planar reconstruction) images.
Calculation of Parameters
ZedKnee can calculate parameters (such as flexion, rotation, resection amount, etc.) using reference points and coordinate axes.
Results can be used intra-operatively to perform surgery accurately.
Post-Operative Assessment (Optional)
User can compare and assess how implant placement parameters have been changed and placed against the reference plane or reference axis as well as how much the alignment has changed after the operation as compared with pre-operative plans made with ZedKnee 3D.
