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Updated: May 27, 2026
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Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
A quantitative three-dimensional templating method for shoulder arthroplasty: biomechanical validation in cadavers.
Heinz R Hoenecke1, Lisa M Tibor, David W Elias
1Department of Orthopaedic Surgery and Sports Medicine, Scripps Clinic, La Jolla, CA 92037, USA. bhoeneck@san.rr.com
Journal of Shoulder and Elbow Surgery
|December 6, 2011
Summary
Preoperative templating for press-fit humeral stems in shoulder arthroplasty is crucial. This study developed a 3D technique, finding that stem design impacts insertion forces and fixation, guiding better surgical outcomes.
Area of Science:
- Orthopedic surgery
- Biomechanical engineering
- Implant design
Background:
- Press-fit humeral components in total shoulder arthroplasty carry risks.
- Preoperative templating and stem design improvements can mitigate these complications.
Purpose of the Study:
- Develop a 3D templating technique for humeral stems.
- Validate this technique using cadaveric specimens.
Main Methods:
- Templated cylindrical and rectangular stems in 15 clinical and 16 cadaveric shoulders.
- Measured insertion forces and monitored hoop strain and fractures in cadavers.
Main Results:
- Significant differences in cortical-implant volume ratio (CIVR) between stem types.
- Insertion forces varied with stem size and cross-section.
- Maximal hoop strain differed significantly between ideal rectangular and cylindrical stems.
Conclusions:
- CIVR effectively predicts ideal humeral stem size.
- Cylindrical and rectangular stems have distinct fixation rationales.
- Anatomic stem designs can minimize complications and optimize fixation.
