Impact of tip-apex distance and femoral head lag screw position on treatment outcomes of unstable intertrochanteric fractures using cephalomedullary nails

The Journal of International Medical Research
Cheng-Hung LeeYun-Che Wu

Abstract

Background Cephalomedullary nails are frequently used in unstable intertrochanteric fractures. The implant position is an important factor for surgical success. Thus, in the present study, finite element analysis methods were used to investigate the biomechanical behavior of five different cephalomedullary nail positions in unstable intertrochanteric fractures. Methods Five different cephalomedullary nail implant positions were investigated. The observed indicators were the maximum displacement of the lag screw, the stress on the intertrochanteric fracture with involvement of the posteromedial cortex, and the tip-apex distance. Results The smallest lag screw displacement was achieved when the implant was closer to the inferior femoral head. Lower stress was placed on the posteromedial cortex when the implant was positioned closer to the inferior femoral head. However, the tip-apex distance increased when the lag screw was positioned more inferiorly. Conclusions The results of this study suggest that positioning the lag screw closer to the inferior aspect of the femoral head can reduce stress on the posteromedial cortex and deformation of the implant in unstable intertrochanteric fractures. These findings provide a biomechanical...Continue Reading

References

Jul 1, 1995·The Journal of Bone and Joint Surgery. American Volume·M R BaumgaertnerJ M Keggi
Sep 29, 2009·Orthopaedics & Traumatology, Surgery & Research : OTSR·H MnifA Abid
Feb 18, 2012·Journal of Orthopaedic Trauma·Paul R T KuzykEmil H Schemitsch
Nov 10, 2012·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Jérôme M GoffinA Hamish Simpson
Jan 4, 2013·BMC Musculoskeletal Disorders·Alicja J BojanAnders Jönsson
Mar 12, 2013·TheScientificWorldJournal·J M BroderickK J Mulhall
Jun 1, 2013·The Bone & Joint Journal·S G F AbramA J M D Andrade
Oct 19, 2013·Journal of Orthopaedic Surgery and Research·Andrej N NikoloskiPiers J Yates
Oct 24, 2013·Journal of Orthopaedic Trauma·James D Michelson
Jan 18, 2014·Orthopaedics & Traumatology, Surgery & Research : OTSR·P Adam
Apr 25, 2014·Clinical Orthopaedics and Related Research·Patrick KaneChristopher Born

❮ Previous
Next ❯

Citations

Jul 28, 2020·Technology and Health Care : Official Journal of the European Society for Engineering and Medicine·Cheng-Chi WangKuo-Chih Su
Feb 11, 2021·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·James R OnggoSina Babazadeh

❮ Previous
Next ❯

Software Mentioned

ANSYS Workbench
ANSYS Workbench FEA
SolidWorks

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.