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Results for “Elbow Prosthesis”

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At least 469 records · Page 26Linked to original sources
PubMed1999

Fasciocutaneous flaps based on fascial feeding vessels for defects in the periolecranon area.

Skin defects over the olecranon process are usually a result of wound dehiscence following trauma or following joint replacement. Rarely, breakdown occurs over the olecranon in degenerative joint diseases and as the result of pressure necrosis. We have used a fascial feeding vessel-based fasciocutaneous flap to reconstruct 10 defects in nine patients. The technique provides a thin and supple local flap that is easy to raise and is reliable.

Adult↗
PubMed2006

Small joint arthroplasty.

There is little published on the radiology of small joint arthroplasty when compared with the commonly performed hip or knee replacement. The types of joint replacement, their clinical efficacy, and the expected radiographic appearances are reviewed for each of these upper and lower extremity joints. Potential complications and their radiographic appearances are presented.

Ankle Joint↗
PubMedDate not supplied

Surface myoelectric signal classification for prostheses control.

This paper represents an ongoing investigation for surface myoelectric signal segmentation and classification. The classical moving average technique augmented with principal components analysis and time-frency analysis were used for segmentation. Multiresolution wavelet analysis was adopted as an effective feature extraction technique while artificial neural networks were used for classification. Results of classifying four elbow and wrist movement signals recorded from biceps and triceps gave 5.1% classification error when two channels were used.

Adult↗
PubMedDate not supplied

Total elbow arthroplasty.

The surgical and therapeutic management for total elbow arthroplasty is reviewed. Surgical overview and techniques, stability issues, factors affecting therapy, and a proposed postoperative treatment plan are presented. Specific therapy management following total elbow replacement has not been published before in a peer-reviewed journal. Further study is needed to obtain patient outcome data following the proposed therapy plan.

Arthritis↗
PubMed2003

Variation in the position and orientation of the elbow flexion axis.

We analysed the axis of movement in the normal elbow during flexion in vivo using radiostereometric analysis (RSA). The results show an intraindividual variation in the inclination of the axis ranging from 2.1 degrees to 14.3 degrees in the frontal and from 1.6 degrees to 9.8 degrees in the horizontal plane analysed at 30 degrees increments. The inclination of the mean axis of rotation varied within a range of 12.7 degrees in the frontal and 4.6 degrees in the horizontal plane. In both planes, the mean axes were located close to a line joining the centres of the trochlea and capitellum. The intra- and interindividual variations of the axes of flexion of the elbow were greater than previously reported. These factors should be considered in the development of elbow prostheses.

Adult↗
PubMed1988

Strength function after elbow arthroplasty.

A prospective study of elbow strength after total elbow joint arthroplasty was conducted in 27 patients (31 procedures). In this overall group, flexion strength improved 92%, pronation, 63%, and supination, 69%. Grip strength improved 35%, but there was no mean improvement in extension strength among these patients. After 27 procedures for rheumatoid arthritis, the average strength improvement of all five functions was 71% compared to a 25% improvement in four patients with nonrheumatoid involvement. Placement of the prosthetic axis of rotation proximal or anterior to the normal axis was associated with consistently poorer strength. The sample was too small to distinguish performance among prosthetic types, but the triceps-sparing approach showed consistently better strength in extension (averaging 20%) than did the other exposures.

Arthritis↗
PubMed1986

The development of a surface arthroplasty for the elbow.

Complex kinematics, anatomical features, and load distribution have contributed to the poor function of constrained and semiconstrained cemented arthroplasties of the elbow. Resurfacing by porous-coated components has the potential, by reproduction of normal joint geometry and restoration of ligament balance, to re-create relatively normal kinematics and load-bearing and provide relief of pain. A method was developed to provide information on the geometry of the lower humeral joint surface and olecranon fossa. The information gained was used to design components to resurface the trochlea, capitellum, and olecranon fossa. A technique was also developed to remove a minimal amount of subchondral bone from the ulna and humerus in a precisely directed fashion for exact fit of the porous-coated components.

Elbow Joint↗
PubMed1979

Total joint arthroplasty. Introduction to the upper extremity.

Total joint replacement in the upper extremity has developed in step with that of the lower extremity. The indications for treatment, the place of total joint arthroplasty in contrast to other forms of arthroplasty, and the criteria for patient selection have recently been classified. A number of problem areas are under biomechanical and clinical study, and most investigators are proceeding cautiously. In properly selected patients, however, prosthetic replacement offers great improvement in both relief of pain and joint function, and improvement should continue. The patient and physician should recognize the limitations that are inherent in any "artificial joint" replacement. Realistic expectations would be for improvement that approaches, but rarely achieves, normal function.

Arthritis↗