Medical Journal of the Islamic Republic Of Iran
مجله پزشکی جمهوری اسلامی ایران
Med J Islam Repub Iran
Medical Sciences
http://mjiri.iums.ac.ir
2
journal2
1016-1430
2251-6840
8
10.18869/mjiri
14
8888
13
en
jalali
1375
2
1
gregorian
1996
5
1
10
1
online
1
fulltext
en
RESPONSE OF METACARPAL FRACTURE FIXATION CONSTRUCTS TO PHYSIOLOGICAL LOADINGS
Biological Sciences
Biological Sciences
Original Research: Basic Science in Medicine
Original Research: Basic Science in Medicine
This study compares the functional capabilities of different metacarpal
fixation constructs under physiological loadings in an attempt to identify the
optimal construct rather than the strongest one. One hundred and twenty-six
preserved human metacarpals were mechanically tested after oblique osteotomies
and internal fixation. Maximum load to failure, average structural rigidity, and
energy absorbed were determined. All the fixations, except the intramedullary
rods, tolerated the assigned physiological loadings below their failure limits in
tension and torsion. The safety factor for K-wire tension band in bendings was only
1.4, which is very low compared to those of dorsal plate fixation (4.3) and the two
interfragmentary lag screw fixation (4.0). Both torsional and axial rigidity of the
K-wire tension band fixation were significantly less than the two interfragmentary
lag screw fixation. Fixation by two interfragmentary lag screws was the optimal
method, providing adequate strength and stability while requiring less soft tissue
dissection than dorsal plate fixation.
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http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-464&slc_lang=en&sid=1
KEIKHOSROW
FIROOZBAKHSH
20031947532846005462
20031947532846005462
Yes
From the Department of Mechanical Engineering, Biomechanics Division, Sharif University of Technology, Tehran, Islamic Republic of Iran
MOHEB S.
MONEIM
20031947532846005463
20031947532846005463
No
the Department of Orthopedics and Rehabilitation, Medical School, University of New Mexico, Albuquerque, New Mexico, U.S.A.