Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8398
Title: Functional restoration and risk of non-union of the first metatarsocuneiform arthrodesis for hallux valgus: A finite element approach
Authors: Wong, DWC
Wang, Y
Zhang, M
Leung, AKL
Issue Date: 2015
Source: Journal of biomechanics, 2015
Abstract: First metatarsocuneiform arthrodesis is one of the surgical interventions to correct hallux valgus, especially those with hypermobile first ray. There is lacking of biomechanical investigations to assess this operation. The objective of this study was to explore the functional restoration and the risk of non-union after the surgery via finite element analysis.A three-dimensional foot model was constructed from a female aged 28 via magnetic resonance imaging. Thirty bones and encapsulated bulk tissue were modeled. Walking stance was simulated by the gait analysis data of the same participant. Parts of the first metatarsal and cuneiform were resected and the bone graft was assigned with the same stiffness as adjacent bones to resemble the surgery of first metatarsocuneiform arthrodesis.The third principal stress of the first metatarsal at midstance (25% stance) and push off (60% stance) was increased by 76% and 139% respectively after the operation, while that of the second metatarsal was decreased by 14% and 66%. The operation reduced the medial deviation of the first metatarsal head by about 3.5. mm during initial push off (60% stance). Besides, the bone graft could experience tensile stress inferiorly (26.51. MPa).In conclusion, the increase of stress on the first metatarsal and the reduced medial excursion of the first metatarsal head after the simulated operation reflected that metatarsocuneiform arthrodesis could restore the load-bearing function of the first ray. However, inter-fragmentary compression could not be guaranteed. The appropriate course of hardware and non-weight-bearing protocol should be noted and further investigated.
Keywords: Bone graft
Hallux valgus
Inter-fragmentary compression
Lapidus procedure
Metatarsocuneiform arthrodesis
Metatarsus primus varus
Publisher: Elsevier
Journal: Journal of biomechanics 
ISSN: 0021-9290
DOI: 10.1016/j.jbiomech.2015.07.013
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

24
Last Week
0
Last month
0
Citations as of Aug 29, 2020

WEB OF SCIENCETM
Citations

18
Last Week
0
Last month
0
Citations as of Sep 14, 2020

Page view(s)

112
Last Week
0
Last month
Citations as of Sep 15, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.