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Anterior or posterior obliquity of the lag screw in the lateral view-Does it affect the sliding characteristics on unstable trochanteric fractures?

Authors
 Si Young Park  ;  Jin Park  ;  Kyu Hyun Yang  ;  Han Kook Yoon  ;  Dong Joo Rhee 
Citation
 INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED, Vol.38(7) : 785-791, 2007 
Journal Title
INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED
ISSN
 0020-1383 
Issue Date
2007
MeSH
Bone Screws ; Fracture Fixation, Intramedullary/instrumentation* ; Hip Fractures/surgery* ; Humans ; Models, Anatomic
Abstract
We investigated the sliding pattern characteristics of proximal fragment in 16 proximal femur models of 31-A2.1 type trochanteric fractures fixed with dynamic hip screw system under load. In eight models, the lag screw was inserted with an anterior-to-posterior vector within the neck and the head of femur (group 1). The other eight had a posterior-to-anterior vector (group 2). A force of 500 N (30 cycles) was applied to the fracture fragment-plate complex using the Instron 6022. No significant difference was noted in the sliding distance between the two groups (p = 0.17). However, the mean angle of rotation of the proximal fragment was twice as great in group 1 (16 ± 3.7°) than that in group 2 (8.1 ± 1.5°) (p < 0.001). In group 1, early eccentric contact in the anterior aspect of the intertrochanteric area caused internal rotation of the proximal fragment. Breakage of the anterior cortex of the lateral wall was noted in five out of the eight cases in group 1 and no case in group 2 (p = 0.026). Fracture of the anterior cortices significantly threatened the integrity of the lateral wall in group 1.
Full Text
http://www.sciencedirect.com/science/article/pii/S0020138307001210
DOI
10.1016/j.injury.2007.03.010
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Park, Si Young(박시영)
Park, Jin(박진)
Yang, Kyu Hyun(양규현) ORCID logo https://orcid.org/0000-0001-7183-588X
Yoon, Han Kook(윤한국)
Rhee, Dong Joo(이동주)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/96118
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