The AnyBody Modeling System has been used to solve a range of problems related to shoulders: e.g. total shoulder arthroplasty implants, effects of rotator cuff tears, creating realistic loads on fracture fixation devices, and to answer many other questions related to shoulders.
- Physiological loads for activities of daily living
- Custom fracture fixation plate evaluation
- Rotator cuff influence on joint stability
- Reverse/anatomical shoulder prosthesis
- Glenohumeral joint stability
- Implant position influence on joint forces/stability
- Effects of Prosthetic Mismatch and Subscapularis Tear on GH Contact
- Subscapularis tear and COP displacement
- Humeral head translations, contact area and center of pressure (COP)
- Shoulder immobilization posture optimization following surgical repair of massive rotator cuff tears
- Influence of proximal humerus medial offset on the destabilizing forces at the intact (healthy) shoulder
- Influence of elevation plane and the friction coefficient on cuff tear arthropathy mechanics
- Influence of humeral head geometry on cuff tear arthropathy mechanics in the context of a hemiarthroplasty.
The modeling approach typically used in this type of models can be found in the Implant behavior inside body – motion, forces, stability” section.
Example of input and output for a total shoulder arthroplasty model:
- Implants CAD files (STL)
- Implant positioning data
- Bone CAD files (STL)
- Anthropometrics data
- Motion data
- Implant contact forces (accounting for muscles)
- Implant motion
- Muscle and ligament forces
- And much more
Contact us to learn more or to discuss how we could solve your problem
Schematic steps to create a force dependent shoulder model
- Reproduce the activity, e.g. arm abduction, using your own data or an existing AnyBody model
- Exclude the default engineering type of joint in the model
- Custom scale the related bones using built in morphing techniques
- Add ligaments in the joint
- Position the implant CAD files on the bones
- Set up contact force object between implants
- Specify which DOF in the model needs to be predicted by the force dependent analysis.
- Run the inverse dynamic model having the force dependent option enabled in the study.
- Evaluate the output: Motion of secondary DOF in shoulder joint, joint reaction forces, muscles, and ligament forces
- Sins L, Tétreault P, Nuño N, Hagemeister N (2016), “Effects of Prosthetic Mismatch and Subscapularis Tear on Glenohumeral Contact Patterns in Total Shoulder Arthroplasty: A Numerical Musculoskeletal Analysis“, J. Biomech. Eng., vol. 138. [DOI]
- Marie C (2015), “Strength analysis of clavicle fracture fixation devices and fixation techniques using finite element analysis with musculoskeletal force input“, Med. Biol. Eng. Comput., vol. 53, pp. 759-769. [DOI]
- Hölscher T, Weber T, Lazarev I, Englert C, Dendorfer S (2016), “Influence of rotator cuff tears on glenohumeral stability during abduction tasks“, J. Orthop. Res., vol. 34, pp. 1628-1635. [DOI]
- More papers on orthopedics