Stress analysis of compression plate fixation and its effects on long bone remodeling

Cheal, E. J.; Hayes, Wilson C.; White, Augustus A.; Perren, Stephan M.

doi:10.1016/0021-9290(85)90006-5

Cited by 50 publications

(36 citation statements)

References 15 publications

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“…Early FE studies conducted on long bones employed highly simplified tubular models [16][17][18], which only model the femoral diaphysis, and thus exclude the distal condyles and/or the proximal trochanteric region. Advances in computing hardware have allowed for more complicated, and thus more realistic, bone geometries to be used in FE studies, like, for example those used by Wang and co-workers [12,13].…”

Section: Use Of Bone Analogues For Biomechanical Studiesmentioning

confidence: 99%

“…Both cancellous ðE¼ 206 MPaÞ and cortical ðE¼ 10 GPaÞ bone were assumed to be linear elastic and isotropic, an approximation that is commonly used in FE studies where comparative, rather than absolute, values of stress are required [12][13][14][16][17][18][19][20], to assess implant performance. The material properties are based on values for the 3rd generation composite bone provided by Pacific Research Laboratories.…”

Section: Meshing and Materials Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Finite element analysis of a femoral retrograde intramedullary nail subject to gait loading

Zalzal

Bhandari

Spelt

et al. 2004

Medical Engineering & Physics

162

141

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Section: Use Of Bone Analogues For Biomechanical Studiesmentioning

confidence: 99%

Section: Meshing and Materials Propertiesmentioning

confidence: 99%

Finite element analysis of a femoral retrograde intramedullary nail subject to gait loading

Zalzal

Bhandari

Spelt

et al. 2004

Medical Engineering & Physics

162

141

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“…While compression plate preloads have been included in some previous numerical studies (Rybicki and Simonen 1977;Cheal et al 1985;Beaupre et al 1988;Ferguson et al 1996;Kim et al 2010), their inclusion is via application of concentrated loads or as prescribed displacements. The effect produced by such techniques is not completely realistic; for example, an applied displacement to the bottom of a screw does not induce loads akin to screw fastening as the threads closest to the displacement will carry larger loads.…”

Section: Introductionmentioning

confidence: 99%

Reasons why dynamic compression plates are inferior to locking plates in osteoporotic bone: a finite element explanation

MacLeod

Simpson

Pankaj

2014

Computer Methods in Biomechanics and Biomedical Engineering

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While locking plate fixation is becoming increasingly popular for complex and osteoporotic fractures, for many indications compression plating remains the standard choice. This study compares the mechanical behaviour of the more recent locking compression plate (LCP) device, with the traditional dynamic compression plates (DCPs) in bone of varying quality using finite element modelling. The bone properties considered include orthotropy, inhomogeneity, cortical thinning and periosteal apposition associated with osteoporosis. The effect of preloads induced by compression plating was included in the models. Two different fracture scenarios were modelled: one with complete reduction and one with a fracture gap. The results show that the preload arising in DCPs results in large principal strains in the bone all around the perimeter of the screw hole, whereas for LCPs large principal strains occur primarily on the side of the screw proximal to the load. The strains within the bone produced by the two screw types are similar in healthy bone with a reduced fracture gap; however, the DCP produces much larger strains in osteoporotic bone. In the presence of a fracture gap, the DCP results in a considerably larger region with high tensile strains and a slightly smaller region with high compressive strains. These findings provide a biomechanical basis for the reported improved performance of locking plates in poorer bone quality.

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“…Previous studies investigated the degree of mechanical stress shielding within plated bones using in vivo animal models (2,3,5,9,11,32,34,35,46,47,48,49), in vitro studies (17,18), and theoretical techniques (4,8,9,(12)(13)(14)(15)26,36,39,40,41,49,50).…”

mentioning

confidence: 99%

Stresses in plated long‐bones: The role of screw tightness and interface slipping

Beaupré

Carter

Orr

et al. 1988

Journal Orthopaedic Research

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Using a three-dimensional finite element model of a plated long bone, we studied the influence of screw tightness, sliding frictional interfaces, and loading magnitude on the stresses within the plated bone. The model incorporated frictional interface elements that allowed stress-free separation under tensile loading to occur between the plate and bone and between the screw heads and the plate. The applied loading stimulated both static preloads created by tightening the screws that secure the plate to the bone and physiologic loads created by activity. Initial screw tightening with plate application created regions of bone hydrostatic compressive stress that may be partly responsible for ischemia under the plate. The inclusion of frictional interfaces resulted in a nonlinear relationship between physiologic loan and bone strain that was dependent on screw tightness. This nonlinear response correlated well with the results of previous in vitro studies showing that slippage between the plate and the bone can occur at physiologic load levels. The results showed that the effect of such slippage can be at least as important as plate material, rigidity, and placement in determining the degree of stress shielding. The results also indicated that previous plated bone models that assumed tight interfaces may have overestimated the extent of mechanical stress shielding.

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Stress analysis of compression plate fixation and its effects on long bone remodeling

Cited by 50 publications

References 15 publications

Finite element analysis of a femoral retrograde intramedullary nail subject to gait loading

Finite element analysis of a femoral retrograde intramedullary nail subject to gait loading

Reasons why dynamic compression plates are inferior to locking plates in osteoporotic bone: a finite element explanation

Stresses in plated long‐bones: The role of screw tightness and interface slipping

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