Document Detail


A femoral neck fracture model in rabbits.
MedLine Citation:
PMID:  12594991     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A technique was developed to create a reproducible femoral neck fracture in vitro using 5-month-old JW/CSK series male rabbits. Force attenuation of a newly developed damping material was also evaluated using this model. Ten pairs of the femora with smaller deviations in length and weight were harvested and cleaned of soft tissue. Either a right or left of each pair of the specimens was randomly selected and put into either the control or the experimental group, both of which contained equal numbers of the right and left femora. The specimens were attached to an L-shaped plate and embedded in a resin from the proximal diaphysis to the distal end so as to maintain a consistent position of the femora. They were mounted and fixed on a pedestal slanted in the coronal plane at 20 degrees. The impact load testing was conducted using an impact mallet dropped from a height of 3 cm. The impact load was applied onto the femoral head. To the specimens in the experimental group, attenuated impact forces were loaded through the damping material, but those in the control group were subjected to forces directly transmitted without the material. All the impact testing was performed in a temperature and humidity controlled chamber. All of the femoral specimens exposed to the direct impact forces (controlled group) sustained fracture at the neck. The fracture line passed from the base of the femoral head laterally and to the calcar area just proximal to the minor trochanter medially. The location of each fracture line was almost identical among the specimens. None of the specimens that were exposed to the impact force through the damping material (experimental group) sustained fracture macroscopically and roentgenographically.
Authors:
Isao Ohnishi; Katsuhiko Oikawa; Koichiro Tsuji; Tadashi Ichikawa; Takahide Kurokawa
Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of biomechanics     Volume:  36     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2003-02-21     Completed Date:  2003-07-02     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  431-42     Citation Subset:  IM    
Affiliation:
Department of Orthopaedic Surgery, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan. ohnishi-dis@h.u-tokyo.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Animals
Compressive Strength
Epoxy Resins / therapeutic use
Femoral Neck Fractures / physiopathology*
Fracture Fixation / methods*
Male
Models, Biological
Rabbits
Reference Values
Stress, Mechanical
Weight-Bearing*
Chemical
Reg. No./Substance:
0/Epoxy Resins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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