Limits...
Evaluation of a computational model to predict elbow range of motion.

Willing RT, Nishiwaki M, Johnson JA, King GJ, Athwal GS - Comput. Aided Surg. (2014)

Bottom Line: The model was validated against experimental results with a cadaveric specimen, and was able to predict the flexion and extension limits of the intact joint to 0° and 3°, respectively.The model was also able to predict the flexion and extension limits to 1° and 2°, respectively, when simulated osteophytes were inserted into the joint.Future studies based on this approach will be used for the prediction of elbow flexion-extension ROM in patients with primary osteoarthritis to help identify motion-limiting hypertrophic osteophytes, and will eventually permit real-time computer-assisted navigated excisions.

View Article: PubMed Central - PubMed

Affiliation: Bioengineering Research Laboratory, The Hand and Upper Limb Centre, Lawson Health Research Institute, St. Joseph's Health Care London , London , Ontario .

ABSTRACT
Computer models capable of predicting elbow flexion and extension range of motion (ROM) limits would be useful for assisting surgeons in improving the outcomes of surgical treatment of patients with elbow contractures. A simple and robust computer-based model was developed that predicts elbow joint ROM using bone geometries calculated from computed tomography image data. The model assumes a hinge-like flexion-extension axis, and that elbow passive ROM limits can be based on terminal bony impingement. The model was validated against experimental results with a cadaveric specimen, and was able to predict the flexion and extension limits of the intact joint to 0° and 3°, respectively. The model was also able to predict the flexion and extension limits to 1° and 2°, respectively, when simulated osteophytes were inserted into the joint. Future studies based on this approach will be used for the prediction of elbow flexion-extension ROM in patients with primary osteoarthritis to help identify motion-limiting hypertrophic osteophytes, and will eventually permit real-time computer-assisted navigated excisions.

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Related in: MedlinePlus

The specimen mounted on an elbow testing apparatus in the horizontal position. Threaded pins were used to lock the forearm in neutral rotation. Markers for the Optotrak Certus® motion tracking system were affixed to the humerus clamp and the ulna.
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f1: The specimen mounted on an elbow testing apparatus in the horizontal position. Threaded pins were used to lock the forearm in neutral rotation. Markers for the Optotrak Certus® motion tracking system were affixed to the humerus clamp and the ulna.

Mentions: The proximal end of the humerus was potted in a plastic cylinder using Denstone dental cement (Heraeus Kulzer, South Bend, IN), and the cylinder was rigidly clamped to an elbow testing apparatus (Figure 1). Pneumatic actuators applied tensile forces to cables sutured to the biceps, brachialis, and triceps muscles of the specimen, routed through pulleys to follow physiological lines of action.Figure 1.


Evaluation of a computational model to predict elbow range of motion.

Willing RT, Nishiwaki M, Johnson JA, King GJ, Athwal GS - Comput. Aided Surg. (2014)

The specimen mounted on an elbow testing apparatus in the horizontal position. Threaded pins were used to lock the forearm in neutral rotation. Markers for the Optotrak Certus® motion tracking system were affixed to the humerus clamp and the ulna.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4269151&req=5

f1: The specimen mounted on an elbow testing apparatus in the horizontal position. Threaded pins were used to lock the forearm in neutral rotation. Markers for the Optotrak Certus® motion tracking system were affixed to the humerus clamp and the ulna.
Mentions: The proximal end of the humerus was potted in a plastic cylinder using Denstone dental cement (Heraeus Kulzer, South Bend, IN), and the cylinder was rigidly clamped to an elbow testing apparatus (Figure 1). Pneumatic actuators applied tensile forces to cables sutured to the biceps, brachialis, and triceps muscles of the specimen, routed through pulleys to follow physiological lines of action.Figure 1.

Bottom Line: The model was validated against experimental results with a cadaveric specimen, and was able to predict the flexion and extension limits of the intact joint to 0° and 3°, respectively.The model was also able to predict the flexion and extension limits to 1° and 2°, respectively, when simulated osteophytes were inserted into the joint.Future studies based on this approach will be used for the prediction of elbow flexion-extension ROM in patients with primary osteoarthritis to help identify motion-limiting hypertrophic osteophytes, and will eventually permit real-time computer-assisted navigated excisions.

View Article: PubMed Central - PubMed

Affiliation: Bioengineering Research Laboratory, The Hand and Upper Limb Centre, Lawson Health Research Institute, St. Joseph's Health Care London , London , Ontario .

ABSTRACT
Computer models capable of predicting elbow flexion and extension range of motion (ROM) limits would be useful for assisting surgeons in improving the outcomes of surgical treatment of patients with elbow contractures. A simple and robust computer-based model was developed that predicts elbow joint ROM using bone geometries calculated from computed tomography image data. The model assumes a hinge-like flexion-extension axis, and that elbow passive ROM limits can be based on terminal bony impingement. The model was validated against experimental results with a cadaveric specimen, and was able to predict the flexion and extension limits of the intact joint to 0° and 3°, respectively. The model was also able to predict the flexion and extension limits to 1° and 2°, respectively, when simulated osteophytes were inserted into the joint. Future studies based on this approach will be used for the prediction of elbow flexion-extension ROM in patients with primary osteoarthritis to help identify motion-limiting hypertrophic osteophytes, and will eventually permit real-time computer-assisted navigated excisions.

Show MeSH
Related in: MedlinePlus