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SHR Neuro Cancer Cardio Lipid Metab Microb
Kasten, P; Krefft, M; Hesselbach, J; Weinberg, AM.
Kinematics of the ulna during pronation and supination in a cadaver study: implications for elbow arthroplasty.
Clin Biomech (Bristol, Avon). 2004; 19(1):31-35
Doi: 10.1016/j.clinbiomech.2003.08.006
Web of Science
PubMed
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- Leading authors Med Uni Graz
- Weinberg Annelie-Martina
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- Abstract:
- OBJECTIVE: Aim of this study was to exactly describe and quantify kinematics of the ulna during pro- and supination. DESIGN: Biomechanical study in fresh frozen cadavers. BACKGROUND: A previous MRI study revealed a varus/valgus motion of the ulna averaging 7.1 degrees during pro-/supination. Axial rotation, however, could not be quantified. METHODS: Sixteen arms were examined in a new apparatus that fixed the humerus on a template and allowed forearm rotation. Motion of a Kirschner wire placed in the ulna was recorded in steps of 30 degrees by two perpendicularly arranged charge coupled device cameras during pro- and supination. RESULTS: From supination to pronation the ulna showed a semi-lunar evasive motion in the coronal and transverse plane with an initial varus shift, then a dorsal and finally a valgus shift. Motion in the coronal plane averaged 14.14 degrees (SD 4.78). Valgus angles of the ulna in 30 degrees, 60 degrees and 90 degrees pronation were significant (P<0.05) to each other and the neutral position. Varus angles of the ulna in 30 degrees, 60 degrees and 90 degrees supination (P<0.01) were significant to each other and the neutral position.A maximum ulnar axial pronation rotation of 3.2 degrees (SD 2 degrees ) was noted. Axial rotation angles of 90 degrees and 60 degrees of pronation were significant to each other and to the neutral position (P<0.05), respectively. CONCLUSIONS: To prevent increased stress on the bone-cement interface in elbow arthroplasty, a mean axial rotation of at least 3.2 degrees should be possible.
- Find related publications in this database (using NLM MeSH Indexing)
- Arthroplasty, Replacement -
- Biomechanics -
- Bone Wires -
- Humans -
- Pronation - physiology
- Supine Position - physiology
- Ulna - physiology
- Find related publications in this database (Keywords)
- pronation
- supination
- ulnar kinematics
- elbow arthroplasty
- forearm rotation
- biomechanics
- ulnar axial rotation