Biomechanical comparison of plantar-to-dorsal and dorsal-to-plantar screw fixation strength for subtalar arthrodesis

Nileshkumar Chaudhari; Alexandre Leme Godoy-Santos; Cesar de Cesar Netto; Ramon Rodriguez; Shouchen Dun; Jun Kit He; Haley McKissack; Glenn S. Fleisig; Eduardo Araujo Nee; Ashish Shah

doi:10.31744/einstein_journal/2020AO5052

Back

Biomechanical comparison of plantar-to-dorsal and dorsal-to-plantar screw fixation strength for subtalar arthrodesis

Journal article

Open access

Biomechanical comparison of plantar-to-dorsal and dorsal-to-plantar screw fixation strength for subtalar arthrodesis

Nileshkumar Chaudhari, Alexandre Leme Godoy-Santos, Cesar de Cesar Netto, Ramon Rodriguez, Shouchen Dun, Jun Kit He, Haley McKissack, Glenn S. Fleisig, Eduardo Araujo Nee and Ashish Shah

Einstein (São Paulo, Brazil), Vol.18, pp.e0-AO5052

01/01/2020

DOI: 10.31744/einstein_journal/2020AO5052

PMCID: PMC7046341

PMID: 32159606

Files and links (1)

url

https://doi.org/10.31744/einstein_journal/2020AO5052View

Published (Version of record) Open Access

Abstract

Objective: To compare screw fixation strength for subtalar arthrodesis. Methods: Eight matched pairs of cadaver feet underwent subtalar joint arthrodesis with two 7.3mm cannulated screws. Randomization was used to assign screw orientation, such that one foot in each pair was assigned dorsal to plantar screw orientation (DP Group), and the other foot, plantar to dorsal orientation (PD Group). Standard surgical technique with fluoroscopy was used for each approach. Following fixation, each specimen was loaded to failure with a Bionix (R) 858 MTS device, applying a downward axial force at a distance to create torque. Torque to failure was compared between DP and PD Groups using Student's t test, with p=0.05 used to determine statistical significance. Results: Statistical analysis demonstrated that the mean torque to failure slightly favored the DP Group (37.3Nm) to the PD Group (32.2Nm). However, the difference between the two groups was not statistically significant (p = 0.55). Conclusion: In subtalar arthrodesis, there is no significant difference in construct strength between dorsal-to-plantar and plantar-to-dorsal screw orientation. The approach chosen by the surgeon should be based on factors other than the biomechanical strength of the screw orientation.

General & Internal Medicine

Life Sciences & Biomedicine

Medicine, General & Internal

Science & Technology

Details

Title: Subtitle: Biomechanical comparison of plantar-to-dorsal and dorsal-to-plantar screw fixation strength for subtalar arthrodesis
Creators: Nileshkumar Chaudhari - University of Alabama at Birmingham
Alexandre Leme Godoy-Santos - Hospital Israelita Albert Einstein
Cesar de Cesar Netto - Univ Iowa Hlth Care, Carver Coll Med, Iowa City, IA USA
Ramon Rodriguez - Tulane University
Shouchen Dun - University of Alabama at Birmingham
Jun Kit He - University of Alabama at Birmingham
Haley McKissack - Univ Alabama Birmingham, Birmingham, AL USA
Glenn S. Fleisig - American Sports Medicine Institute
Eduardo Araujo Nee - Hosp Israelita Albert Einstein, Sao Paulo, SP, Brazil
Ashish Shah - University of Alabama at Birmingham
Resource Type: Journal article
Publication Details: Einstein (São Paulo, Brazil), Vol.18, pp.e0-AO5052
DOI: 10.31744/einstein_journal/2020AO5052
PMID: 32159606
PMCID: PMC7046341
NLM abbreviation: Einstein (Sao Paulo)
ISSN: 1679-4508
eISSN: 2317-6385
Publisher: Inst Israelita Ensino & Pesquisa Albert Einstein
Number of pages: 6
Language: English
Date published: 01/01/2020
Academic Unit: Orthopedics and Rehabilitation
Record Identifier: 9984304720002771

Metrics

31 Record Views

1 Times Cited - Web of Science

See more details