The biomechanical effect of artificial and human bone density on stopping and stripping torque during screw insertion

Tsuji, Matthew; Crookshank, Meghan; Olsen, Michael; Schemitsch, Emil H.; Zdero, Rad

doi:10.1016/j.jmbbm.2013.03.006

Cited by 52 publications

(30 citation statements)

References 40 publications

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“…[48] on cortical screw purchase, it was found that artificial 'normal' humeri required higher absolute force than embalmed humeri. To usefully apply the findings to the clinical context, correction coefficients need to be developed [49] . Besides the maximum pullout force, other parameters such as stiffness and strain energy provide useful information regarding screw fixation as well.…”

Section: Discussionmentioning

confidence: 99%

Effect of various factors on pull out strength of pedicle screw in normal and osteoporotic cancellous bone models

Varghese

Kumar

Krishnan

2017

Medical Engineering & Physics

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Section: Discussionmentioning

confidence: 99%

Effect of various factors on pull out strength of pedicle screw in normal and osteoporotic cancellous bone models

Varghese

Kumar

Krishnan

2017

Medical Engineering & Physics

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“…As we have chosen to demonstrate the mechanical stability in a generic test setup simulating stability under well‐defined loading conditions, sawbone foam specimens provided a much better availability and reproducibility. The transferability of the findings of mechanical tests in polyurethane foam to human trabecular bone although not perfect might be adequate for the chosen testing scenario . Nevertheless, we found it necessary to confirm our findings in sawbone specimens by testing the reproducibility in bovine trabecular bone specimens.…”

Section: Discussionmentioning

confidence: 76%

Fixation performance of an ultrasonically fused, bioresorbable osteosynthesis implant: A biomechanical and biocompatibility study

Augat

Robioneck²,

Abdulazim

et al. 2015

J Biomed Mater Res

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Bioresorbable implants may serve as an alternative option for the fixation of bone fractures. Because of their minor inherent mechanical properties and insufficient anchorage within bone bioresorbable implants have so far been limited to mechanically nondemanding fracture types. By briefly liquefying the surface of the biomaterial during insertion, bioresorbable implants can be ultrasonically fused with bone to improve their mechanical fixation. The objective of this study was to investigate the biomechanical fixation performance and in vivo biocompatibility of an ultrasonically fused bioresorbable polymeric pin (SonicPin). First, we biomechanically compared the fused pin with press fitted metallic and bioresorbable polymeric implants for quasi-static and fatigue strength under shear and tensile loading in a polyurethane foam model. Second, fused implants were inserted into cancellous bovine bone and tested biomechanically to verify the reproducibility of their fusion behavior. Finally, the fused pins were tested in a lapine model of femoral condyle osteotomies and were histologically examined by light and transmission electron microscopy. While comparable under static shear loads, fixation performance of ultrasonically fused pins was significantly (p = 0.001) stronger under tensile loading than press fit implants and showed no pull-out. Both bioresorbable implants withstood comparable fatigue shear strength, but less than the K-wire. In bovine bone the ultrasonic fusion process worked highly reproducible and provided consistent mechanical fixation. In vivo, the polymeric pin produced no notable foreign body reactions or resorption layers. Ultrasonic fusion of polymeric pins achieved adequate and consistent mechanical fixation with high reproducibility and exhibits good short-term resorption and biocompatibility.

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“…Commercially available bones do not deliver realistic haptic feedback during orthopedic interventions [12][13][14]. In addition, a surgical simulator for the training of parietal graft lifts is currently not available and therefore it is apparent that sufficient artificial bones would be beneficial for surgical training.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies show that these PU models match in mechanical properties with human bones [10,11]. However investigations dealing with orthopedic applications on these PU based models show controverse results [12][13][14]. The goal of this investigation was the development of parietal bone surrogates which are validated for drilling, milling and sawing.…”

Section: Introductionmentioning

confidence: 99%

Development of parietal bone surrogates for parietal graft lift training

Hollensteiner

Fürst

Esterer

et al. 2016

Current Directions in Biomedical Engineering

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Abstract:Currently the surgical training of parietal bone graft techniques is performed on patients or specimens. Commercially available bone models do not deliver realistic haptic feedback. Thus customized parietal skull surrogates were developed for surgical training purposes. Two human parietal bones were used as reference. Based on the measurement of insertion forces of drilling, milling and saw procedures suitable material compositions for molding cortical and cancellous calvarial layers were found. Artificial skull caps were manufactured and tested. Additionally microtomograpy images of human and artificial parietal bones were performed to analyze outer table and diploe thicknesses. Significant differences between human and artificial skulls were not detected with the mechanical procedures tested. Highly significant differences were found for the diploe thickness values. In conclusion, an artificial bone has been created, mimicking the properties of human parietal bone thus being suitable for tabula externa graft lift training.

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The biomechanical effect of artificial and human bone density on stopping and stripping torque during screw insertion

Cited by 52 publications

References 40 publications

Effect of various factors on pull out strength of pedicle screw in normal and osteoporotic cancellous bone models

Effect of various factors on pull out strength of pedicle screw in normal and osteoporotic cancellous bone models

Fixation performance of an ultrasonically fused, bioresorbable osteosynthesis implant: A biomechanical and biocompatibility study

Development of parietal bone surrogates for parietal graft lift training

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