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Glenoid bone strain after anatomical total shoulder arthroplasty: In vitro measurements with micro-CT and digital volume correlation.

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Title: Glenoid bone strain after anatomical total shoulder arthroplasty: In vitro measurements with micro-CT and digital volume correlation.
Authors: Boulanaache, Y.1 (AUTHOR), Becce, F.2 (AUTHOR), Farron, A.3 (AUTHOR), Pioletti, D.P.1 (AUTHOR), Terrier, A.1 (AUTHOR) alexandre.terrier@epfl.ch
Source: Medical Engineering & Physics. Nov2020, Vol. 85, p48-54. 7p.
Subjects: Bones, Arthroplasty, Glenohumeral joint, Eccentric loads, Shoulder, Error analysis in mathematics
Abstract: • Glenoid bone displacement and strain evaluated during 1500 N applied loading. • Digital Volume Correlation (DVC) applied to measure implanted glenoid bone strain. • Loading device developed to fit in micro-CT scanner. • In-depth error analysis of the DVC technique evaluated. • DVC measurement technique suitable to provide glenoid bone full-field strain map. Glenoid implant loosening remains a major source of failure and concern after anatomical total shoulder arthroplasty (aTSA). It is assumed to be associated with eccentric loading and excessive bone strain, but direct measurement of bone strain after aTSA is not available yet. Therefore, our objective was to develop an in vitro technique for measuring bone strain around a loaded glenoid implant. A custom loading device (1500 N) was designed to fit within a micro-CT scanner, to use digital volume correlation for measuring displacement and calculating strain. Errors were evaluated with three pairs of unloaded scans. The average displacement random error of three pairs of unloaded scans was 6.1 µm. Corresponding systematic and random errors of strain components were less than 806.0 µε and 2039.9 µε, respectively. The average strain accuracy (MAER) and precision (SDER) were 694.3 µε and 440.3 µε, respectively. The loaded minimum principal strain (8738.9 µε) was 12.6 times higher than the MAER (694.3 µε) on average, and was above the MAER for most of the glenoid bone volume (98.1%). Therefore, this technique proves to be accurate and precise enough to eventually compare glenoid implant designs, fixation techniques, or to validate numerical models of specimens under similar loading. Image, graphical abstract [ABSTRACT FROM AUTHOR]
Copyright of Medical Engineering & Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Label: Title
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  Data: Glenoid bone strain after anatomical total shoulder arthroplasty: In vitro measurements with micro-CT and digital volume correlation.
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  Data: <searchLink fieldCode="AR" term="%22Boulanaache%2C+Y%2E%22">Boulanaache, Y.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Becce%2C+F%2E%22">Becce, F.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Farron%2C+A%2E%22">Farron, A.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pioletti%2C+D%2EP%2E%22">Pioletti, D.P.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Terrier%2C+A%2E%22">Terrier, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> alexandre.terrier@epfl.ch</i>
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  Data: <searchLink fieldCode="JN" term="%22Medical+Engineering+%26+Physics%22">Medical Engineering & Physics</searchLink>. Nov2020, Vol. 85, p48-54. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Bones%22">Bones</searchLink><br /><searchLink fieldCode="DE" term="%22Arthroplasty%22">Arthroplasty</searchLink><br /><searchLink fieldCode="DE" term="%22Glenohumeral+joint%22">Glenohumeral joint</searchLink><br /><searchLink fieldCode="DE" term="%22Eccentric+loads%22">Eccentric loads</searchLink><br /><searchLink fieldCode="DE" term="%22Shoulder%22">Shoulder</searchLink><br /><searchLink fieldCode="DE" term="%22Error+analysis+in+mathematics%22">Error analysis in mathematics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Glenoid bone displacement and strain evaluated during 1500 N applied loading. • Digital Volume Correlation (DVC) applied to measure implanted glenoid bone strain. • Loading device developed to fit in micro-CT scanner. • In-depth error analysis of the DVC technique evaluated. • DVC measurement technique suitable to provide glenoid bone full-field strain map. Glenoid implant loosening remains a major source of failure and concern after anatomical total shoulder arthroplasty (aTSA). It is assumed to be associated with eccentric loading and excessive bone strain, but direct measurement of bone strain after aTSA is not available yet. Therefore, our objective was to develop an in vitro technique for measuring bone strain around a loaded glenoid implant. A custom loading device (1500 N) was designed to fit within a micro-CT scanner, to use digital volume correlation for measuring displacement and calculating strain. Errors were evaluated with three pairs of unloaded scans. The average displacement random error of three pairs of unloaded scans was 6.1 µm. Corresponding systematic and random errors of strain components were less than 806.0 µε and 2039.9 µε, respectively. The average strain accuracy (MAER) and precision (SDER) were 694.3 µε and 440.3 µε, respectively. The loaded minimum principal strain (8738.9 µε) was 12.6 times higher than the MAER (694.3 µε) on average, and was above the MAER for most of the glenoid bone volume (98.1%). Therefore, this technique proves to be accurate and precise enough to eventually compare glenoid implant designs, fixation techniques, or to validate numerical models of specimens under similar loading. Image, graphical abstract [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Medical Engineering & Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.medengphy.2020.09.009
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        Text: English
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        Type: general
      – SubjectFull: Arthroplasty
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      – SubjectFull: Glenohumeral joint
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      – SubjectFull: Eccentric loads
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      – SubjectFull: Shoulder
        Type: general
      – SubjectFull: Error analysis in mathematics
        Type: general
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      – TitleFull: Glenoid bone strain after anatomical total shoulder arthroplasty: In vitro measurements with micro-CT and digital volume correlation.
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              Text: Nov2020
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