Effect of Implantation Accuracy on Ankle Contact Mechanics with a Metallic Focal Resurfacing Implant

Anderson, Donald D.; Tochigi, Yuki; Rudert, Maximilian; Vaseenon, Tanawat; Brown, Thomas; Amendola, Annunziato

doi:10.2106/jbjs.i.00431

Cited by 41 publications

(32 citation statements)

References 54 publications

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“…However, a compressive load of only 300 N (approximately one-half of body weight) was applied in the present study, consistent with previous cadaveric models 12,14,37 , although one previous study used 700 N 17 . Large joint moments are also generated about the ankle, with plantar flexion moments as high as 250 Nm [38][39][40] .…”

Section: Discussionsupporting

confidence: 85%

Initial Instability in Total Ankle Replacement: A Cadaveric Biomechanical Investigation of the STAR and Agility Prostheses

McInnes

Younger

Oxland

2014

The Journal of Bone and Joint Surgery

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Section: Discussionsupporting

confidence: 85%

Initial Instability in Total Ankle Replacement: A Cadaveric Biomechanical Investigation of the STAR and Agility Prostheses

McInnes

Younger

Oxland

2014

The Journal of Bone and Joint Surgery

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“…7,8,10,11 These findings also have clinical significance when considering hemiarthroplasty and metallic osteochondral defect fillers, as an illustration of nonphysiologic cartilage stresses associated with a metal-on-cartilage situation. 12 …”

Section: Discussionmentioning

confidence: 99%

Cartilage‐on‐cartilage versus metal‐on‐cartilage impact characteristics and responses

Heiner

Smith

Goetz

et al. 2013

Journal Orthopaedic Research

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A common in vitro model for studying acute mechanical damage in cartilage is to impact an isolated osteochondral or cartilage specimen with a metallic impactor. The mechanics of a cartilage-on-cartilage (COC) impact, as encountered in vivo, are likely different than those of a metal-on-cartilage (MOC) impact. The hypothesis of this study was that impacted in vitro COC and MOC specimens would differ in their impact behavior, mechanical properties, chondrocyte viability, cell metabolism, and histologic structural damage. Osteochondral specimens were impacted with either an osteochondral plug or a metallic cylinder at the same delivered impact energy per unit area, and processed after 14 days in culture. The COC impacts resulted in about half of the impact maximum stress and a quarter of the impact maximum stress rate of change, as compared to the MOC impacts. The impacted COC specimens had smaller changes in mechanical properties, smaller decreases in chondrocyte viability, higher total proteoglycan content, and less histologic structural damage, as compared to the impacted MOC specimens. If metal-on-cartilage impact conditions are to be used for modeling of articular injuries and post-traumatic osteoarthritis, the differences between COC and MOC impacts must be kept in mind.

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“…Most current finite element models of TAR are limited to the intra-articular aspects or to the prosthetic components (Anderson et al, 2006(Anderson et al, , 2010Reggiani et al, 2006;Espinosa et al, 2010;Barg et al, 2011). Therefore, the goal of this study was to develop and validate a finite element model of TAR, for future testing of hypotheses related to clinical issues.…”

Section: Introductionmentioning

confidence: 99%

Development and experimental validation of a finite element model of total ankle replacement

Terrier

Larrea

Guerdat

et al. 2014

Journal of Biomechanics

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a b s t r a c tTotal ankle replacement remains a less satisfactory solution compared to other joint replacements. The goal of this study was to develop and validate a finite element model of total ankle replacement, for future testing of hypotheses related to clinical issues. To validate the finite element model, an experimental setup was specifically developed and applied on 8 cadaveric tibias. A non-cemented press fit tibial component of a mobile bearing prosthesis was inserted into the tibias. Two extreme anterior and posterior positions of the mobile bearing insert were considered, as well as a centered one. An axial force of 2 kN was applied for each insert position. Strains were measured on the bone surface using digital image correlation. Tibias were CT scanned before implantation, after implantation, and after mechanical tests and removal of the prosthesis. The finite element model replicated the experimental setup. The first CT was used to build the geometry and evaluate the mechanical properties of the tibias. The second CT was used to set the implant position. The third CT was used to assess the bone-implant interface conditions. The coefficient of determination (R-squared) between the measured and predicted strains was 0.91. Predicted bone strains were maximal around the implant keel, especially at the anterior and posterior ends. The finite element model presented here is validated for future tests using more physiological loading conditions.

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Effect of Implantation Accuracy on Ankle Contact Mechanics with a Metallic Focal Resurfacing Implant

Cited by 41 publications

References 54 publications

Initial Instability in Total Ankle Replacement: A Cadaveric Biomechanical Investigation of the STAR and Agility Prostheses

Initial Instability in Total Ankle Replacement: A Cadaveric Biomechanical Investigation of the STAR and Agility Prostheses

Cartilage‐on‐cartilage versus metal‐on‐cartilage impact characteristics and responses

Development and experimental validation of a finite element model of total ankle replacement

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