A finite element analysis of bone plates available for prophylactic internal fixation of the radial osteocutaneous donor site using the sheep tibia model

C. M E Avery, Péter Bujtár, János Simonovics, Tamás Dézsi, K. Váradi, George K B Sándor, Jingzhe Pan

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Introduction: The strengthening effect of prophylactic internal fixation (PIF) with a bone plate at the radial osteocutaneous flap donor site has previously been demonstrated using the sheep tibia model of the human radius. This study investigated whether a finite element (FE) model could accurately represent this biomechanical model and whether stress or strain based failure criteria are most appropriate. Methods: An FE model of an osteotomised sheep tibia bone was strengthened using 4 types of plates with unilocking or bicortical screw fixation. Torsion and 4-point bending simulations were performed. The maximum von Mises stresses and strain failure criteria were studied. Results: The strengthening effects when applying stress failure criteria [factor 1.76-4.57 bending and 1.33-1.80 torsion] were comparable to the sheep biomechanical model [factor 1.73-2.43 bending and 1.54-2.63 torsion]. The strongest construct was the straight 3.5. mm stainless steel unilocking plate. Applying strain criteria the strongest construct was the straight 3.5. mm stainless DCP plate with bicortical screw fixation. Conclusions: The FE model was validated by comparison with the sheep tibia model. The complex biomechanics at the bone-screw interface require further investigation. This FE modelling technique may be applied to a model of the human radius and other sites.

Original languageEnglish
Pages (from-to)1421-1430
Number of pages10
JournalMedical Engineering and Physics
Volume35
Issue number10
DOIs
Publication statusPublished - Oct 2013

Fingerprint

Bone Plates
Finite Element Analysis
Tibia
Sheep
Bone
Finite element method
Bone Screws
Torsional stress
Stainless Steel
Biomechanical Phenomena
Bone and Bones
Biomechanics
Stainless steel

Keywords

  • Biomechanics
  • Bone plate
  • Finite element analysis
  • Fracture
  • Morbidity
  • Radius
  • Sheep tibia

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biophysics

Cite this

A finite element analysis of bone plates available for prophylactic internal fixation of the radial osteocutaneous donor site using the sheep tibia model. / Avery, C. M E; Bujtár, Péter; Simonovics, János; Dézsi, Tamás; Váradi, K.; Sándor, George K B; Pan, Jingzhe.

In: Medical Engineering and Physics, Vol. 35, No. 10, 10.2013, p. 1421-1430.

Research output: Contribution to journalArticle

Avery, C. M E ; Bujtár, Péter ; Simonovics, János ; Dézsi, Tamás ; Váradi, K. ; Sándor, George K B ; Pan, Jingzhe. / A finite element analysis of bone plates available for prophylactic internal fixation of the radial osteocutaneous donor site using the sheep tibia model. In: Medical Engineering and Physics. 2013 ; Vol. 35, No. 10. pp. 1421-1430.
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AB - Introduction: The strengthening effect of prophylactic internal fixation (PIF) with a bone plate at the radial osteocutaneous flap donor site has previously been demonstrated using the sheep tibia model of the human radius. This study investigated whether a finite element (FE) model could accurately represent this biomechanical model and whether stress or strain based failure criteria are most appropriate. Methods: An FE model of an osteotomised sheep tibia bone was strengthened using 4 types of plates with unilocking or bicortical screw fixation. Torsion and 4-point bending simulations were performed. The maximum von Mises stresses and strain failure criteria were studied. Results: The strengthening effects when applying stress failure criteria [factor 1.76-4.57 bending and 1.33-1.80 torsion] were comparable to the sheep biomechanical model [factor 1.73-2.43 bending and 1.54-2.63 torsion]. The strongest construct was the straight 3.5. mm stainless steel unilocking plate. Applying strain criteria the strongest construct was the straight 3.5. mm stainless DCP plate with bicortical screw fixation. Conclusions: The FE model was validated by comparison with the sheep tibia model. The complex biomechanics at the bone-screw interface require further investigation. This FE modelling technique may be applied to a model of the human radius and other sites.

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