Preoperative Evaluation Using ZedShoulder in Total Shoulder Arthroplasty
Objective
In total shoulder arthroplasty for glenohumeral osteoarthritis, evaluate glenoid bone morphology preoperatively.
Subjects
- Cases: 9 cases, 9 joints
- Sex: 3 male, 6 female
- Diagnosis: Glenohumeral osteoarthritis
Evaluation Items
- Glenoid bone defect pattern
- Glenoid component placement angle
- Implant size selection
Results
The optimal implant selection and placement plan tailored to the bone defect pattern could be established preoperatively.
Discussion
Preoperative planning tailored to the bone defect pattern is expected to improve initial implant fixation.
ZedShoulder
Overview
A module that supports evaluation of scapular and humeral bone morphology and implant placement simulation for shoulder arthroplasty.
ZedShoulder creates 3D models of the bone using CT data, and supports planning and assessing RSA (Reverse Shoulder Arthroplasty) and TSA (Total Shoulder Arthroplasty).
User can perform surgical simulations (such as positioning of glenoid component, calculation of parameters, etc.) in simple steps, and also calculate ROM (Range Of Motion) of the shoulder.
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.
Furthermore, this database application can be used as simple DICOM viewer to view the images in axial, sagittal and coronal views.
Positioning of Implants
.Implants can be placed at optimal positions on 3D model and MPR (Multi-Planar Reconstruction) images created based on CT images.
User can create 3D templating of off-the-shelf stem and glenoid.
Calculation of Parameters
ZedShoulder can calculate parameters such as:
- Pre-Operative Parameters: Humerus Retroversion, Glenoid Version and Inclination
- Humerus Stem: Stem Retroversion, Angle of Adduction and Flexion
- Glenoid: Version, Inclination, etc.
Bone Transplantation Simulation
User can simulate bone transplantation in a few steps.
The diagonally cut cylinder is used for the transplantation model, and the shape can be changed.
ROM Simulation
User can simulate ROM by repositioning stem and glenoid placed in 3D templating.
The position of impingement between stem and glenoid, and humerus and scapula can be checked in 3D, and a red mark is displayed at the point of impingement.
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 ZedShoulder 3D.
