dc.contributor.author |
Chanlalit C. |
|
dc.contributor.author |
Shukla D.R. |
|
dc.contributor.author |
Fitzsimmons J.S. |
|
dc.contributor.author |
An K.-N. |
|
dc.contributor.author |
O'Driscoll S.W. |
|
dc.date.accessioned |
2021-04-05T03:34:06Z |
|
dc.date.available |
2021-04-05T03:34:06Z |
|
dc.date.issued |
2012 |
|
dc.identifier.issn |
10582746 |
|
dc.identifier.other |
2-s2.0-84862651249 |
|
dc.identifier.uri |
https://ir.swu.ac.th/jspui/handle/123456789/14316 |
|
dc.identifier.uri |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84862651249&doi=10.1016%2fj.jse.2011.05.001&partnerID=40&md5=e96495e951ef512dc67512044192403a |
|
dc.description.abstract |
Background: Successful bone ingrowth around cementless implants requires adequate initial stability. Hoop stress fractures during stem insertion can potentially hinder prosthesis stability. Hypothesis: We hypothesized that an oversized radial head prosthetic stem (1 mm "too large" and causing a hoop stress fracture during insertion) would result in an unacceptable amount of micromotion. Materials and methods: Grit-blasted radial head prosthetic stems were implanted into cadaveric radii. Rasp and stem insertion energies were measured, along with micromotion at the stem tip. The sizes were increased until a fracture developed in the radial neck. Results: Prosthetic radial head stems that were oversized by 1 mm caused small cracks in the radial neck. Micromotion of oversized stems (42 ± 7 μm) was within the threshold conducive for bone ingrowth (<100 μm) and not significantly different from that for the maximum sized stems (50 ± 12 μm) (P ≥.4). Discussion: Contrary to our hypothesis, hoop stress fractures caused by implantation of a stem oversized by 1 mm did not result in loss of stability. Stem micromotion remained within the range for bone ingrowth and was not significantly diminished after the fracture. This suggests that if a crack occurs during the final stages of stem insertion, it may be acceptable to leave the stem in place without adding a cerclage wire. Conclusion: A small radial neck fracture occurring during insertion of a radial head prosthetic stem oversized by 1 mm does not necessarily compromise initial stability. © 2012 Journal of Shoulder and Elbow Surgery Board of Trustees. |
|
dc.subject |
arm prosthesis |
|
dc.subject |
article |
|
dc.subject |
cerclage |
|
dc.subject |
clinical article |
|
dc.subject |
human |
|
dc.subject |
human tissue |
|
dc.subject |
micromotion |
|
dc.subject |
motion |
|
dc.subject |
priority journal |
|
dc.subject |
radius fracture |
|
dc.subject |
stress fracture |
|
dc.subject |
Aged, 80 and over |
|
dc.subject |
Analysis of Variance |
|
dc.subject |
Arthroplasty, Replacement, Elbow |
|
dc.subject |
Biomechanics |
|
dc.subject |
Cadaver |
|
dc.subject |
Coated Materials, Biocompatible |
|
dc.subject |
Elbow Joint |
|
dc.subject |
Elbow Prosthesis |
|
dc.subject |
Female |
|
dc.subject |
Fractures, Stress |
|
dc.subject |
Humans |
|
dc.subject |
Male |
|
dc.subject |
Motion |
|
dc.subject |
Osseointegration |
|
dc.subject |
Prosthesis Design |
|
dc.subject |
Prosthesis Failure |
|
dc.subject |
Radius |
|
dc.subject |
Random Allocation |
|
dc.subject |
Stress, Mechanical |
|
dc.subject |
Surface Properties |
|
dc.title |
Effect of hoop stress fracture on micromotion of textured ingrowth stems for radial head replacement |
|
dc.type |
Article |
|
dc.rights.holder |
Scopus |
|
dc.identifier.bibliograpycitation |
Journal of Shoulder and Elbow Surgery. Vol 21, No.7 (2012), p.949-954 |
|
dc.identifier.doi |
10.1016/j.jse.2011.05.001 |
|