Finite element analysis of plate-screw systems used in medial opening wedge proximal tibial osteotomies

Julie Kimsal; Deana Mercer; Robert Schenck; Thomas DeCoster; Shahram Bozorgnia; Jennifer Fitzpatrick; Gary Mlady; Jesus Lerma; Tariq Khraishi

doi:10.1504/IJBET.2015.072934

Finite element analysis of plate-screw systems used in medial opening wedge proximal tibial osteotomies

Julie Kimsal, Deana Mercer, Robert Schenck, Thomas DeCoster, Shahram Bozorgnia, Jennifer Fitzpatrick, Gary Mlady, Jesus Lerma, Tariq Khraishi

Orthopaedic Surgery

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

This study investigates, through finite-element analysis, different plate-screw fixation systems used for medial opening proximal tibial osteotomies (locking or non-locking with or without a medial spacer). Sulzer stainless steel non-locking without spacer, Synthes titanium locking without spacer, Smith and Nephew custom titanium locking with a wedge spacer and Arthrex stainless steel non-locking with a wedge spacer fixation systems were modelled and compared. All fixation systems were tested under static loading of 889 N applied evenly over the proximal tibia particular surface. The areas of highest stress experienced in the bone and the plate/screw interface were analysed. Tendency of the osteotomy wedge to close under loading for each fixation system was analysed. The numerical results suggest the titanium locking plate with wedge spacer block outperforms the others by achieving lower stresses (incurred by the fixation system and bone) and loss of correction. Locking screw mechanisms and wedge spacer blocks appear advantageous.

Original language	English (US)
Pages (from-to)	154-168
Number of pages	15
Journal	International Journal of Biomedical Engineering and Technology
Volume	19
Issue number	2
DOIs	https://doi.org/10.1504/IJBET.2015.072934
State	Published - 2015

Keywords

Osteotomy
finite element analysis
orthopaedics
osteoarthritis
tibia.

ASJC Scopus subject areas

Biomedical Engineering

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Finite element analysis of plate-screw systems used in medial opening wedge proximal tibial osteotomies. / Kimsal, Julie; Mercer, Deana; Schenck, Robert; DeCoster, Thomas; Bozorgnia, Shahram; Fitzpatrick, Jennifer; Mlady, Gary; Lerma, Jesus; Khraishi, Tariq.

In: International Journal of Biomedical Engineering and Technology, Vol. 19, No. 2, 2015, p. 154-168.

Research output: Contribution to journal › Article › peer-review

Kimsal, Julie ; Mercer, Deana ; Schenck, Robert ; DeCoster, Thomas ; Bozorgnia, Shahram ; Fitzpatrick, Jennifer ; Mlady, Gary ; Lerma, Jesus ; Khraishi, Tariq. / Finite element analysis of plate-screw systems used in medial opening wedge proximal tibial osteotomies. In: International Journal of Biomedical Engineering and Technology. 2015 ; Vol. 19, No. 2. pp. 154-168.

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abstract = "This study investigates, through finite-element analysis, different plate-screw fixation systems used for medial opening proximal tibial osteotomies (locking or non-locking with or without a medial spacer). Sulzer stainless steel non-locking without spacer, Synthes titanium locking without spacer, Smith and Nephew custom titanium locking with a wedge spacer and Arthrex stainless steel non-locking with a wedge spacer fixation systems were modelled and compared. All fixation systems were tested under static loading of 889 N applied evenly over the proximal tibia particular surface. The areas of highest stress experienced in the bone and the plate/screw interface were analysed. Tendency of the osteotomy wedge to close under loading for each fixation system was analysed. The numerical results suggest the titanium locking plate with wedge spacer block outperforms the others by achieving lower stresses (incurred by the fixation system and bone) and loss of correction. Locking screw mechanisms and wedge spacer blocks appear advantageous.",

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