Surface extraction can provide a reference for micro-CT analysis of retrieved total knee implants
Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple sc...
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| Veröffentlicht in: | The knee Jg. 21; H. 4; S. 801 - 805 |
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Elsevier B.V
01.08.2014
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| Abstract | Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness.
New tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined.
The deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010mm) were less (p<0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053mm).
An extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries.
This will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo. |
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| AbstractList | Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness.
New tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined.
The deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010 mm) were less (p<0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053 mm).
An extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries.
This will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo. Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness. New tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined. The deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010mm) were less (p<0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053mm). An extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries. This will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo. Abstract Background Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness. Methods New tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined. Results The deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010 mm) were less (p < 0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053 mm). Conclusions An extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries. Clinical relevance This will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo. Background Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness. Methods New tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined. Results The deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010mm) were less (p<0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053mm). Conclusions An extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries. Clinical relevance This will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo. Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness.BACKGROUNDQuantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information. However, to perform these measurements there needs to be an estimate of the original, unworn geometry of the component, often requiring multiple scans of the various sizes of components that have been retrieved. The objective of this study was to determine whether the articular and backside surfaces could be independently segmented from a micro-CT reconstruction of a tibial insert, such that a tibial insert of one thickness could be used as a reference for a tibial insert of a different thickness.New tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined.METHODSNew tibial inserts of a single width but with six different thicknesses were obtained and scanned with micro-CT. An automated method was developed to computationally segment the articular and backside surfaces of the components. Variability between intact and extracted components was determined.The deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010 mm) were less (p<0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053 mm).RESULTSThe deviations between the comparisons of the extracted surfaces (range, 0.0004 to 0.010 mm) were less (p<0.001) than the baseline deviation between the intact surfaces (range, 0.0002 to 0.053 mm).An extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries.CONCLUSIONSAn extracted surface from one insert thickness could be used to accurately represent the surface of an insert of a different thickness. This greatly enhances the feasibility of performing retrieval studies using micro-CT as a quantitative tool, by reducing the costs and time associated with acquiring, scanning, and reconstructing multiple reference tibial insert geometries.This will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo.CLINICAL RELEVANCEThis will add greater detail to studies of retrieved implants, to better establish how implants are functioning in vivo. |
| Author | Naudie, Douglas D.R. MacDonald, Steven J. Teeter, Matthew G. Milner, Jaques S. |
| Author_xml | – sequence: 1 givenname: Matthew G. surname: Teeter fullname: Teeter, Matthew G. email: matthew.teeter@lhsc.on.ca organization: Division of Orthopaedic Surgery, London Health Sciences Centre, London, ON, Canada – sequence: 2 givenname: Jaques S. surname: Milner fullname: Milner, Jaques S. organization: Imaging Research Laboratories, Robarts Research Institute, London, ON, Canada – sequence: 3 givenname: Douglas D.R. surname: Naudie fullname: Naudie, Douglas D.R. organization: Division of Orthopaedic Surgery, London Health Sciences Centre, London, ON, Canada – sequence: 4 givenname: Steven J. surname: MacDonald fullname: MacDonald, Steven J. organization: Division of Orthopaedic Surgery, London Health Sciences Centre, London, ON, Canada |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/24853191$$D View this record in MEDLINE/PubMed |
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| CitedBy_id | crossref_primary_10_1016_j_knee_2016_12_010 crossref_primary_10_1016_j_wear_2020_203552 crossref_primary_10_1155_2018_3601480 crossref_primary_10_3390_ma10040364 crossref_primary_10_1002_jbm_b_33684 crossref_primary_10_1016_j_arth_2015_06_036 crossref_primary_10_1016_j_arth_2015_07_045 |
| Cites_doi | 10.1016/j.arth.2009.11.001 10.1002/jbm.820170510 10.1002/jbm.b.32782 10.1097/01.blo.0000063604.67412.04 10.1016/j.arth.2010.01.096 10.1007/s11999-012-2513-2 10.1177/0954411913486755 10.5435/00124635-200701000-00006 10.1016/j.biomaterials.2007.07.040 10.1007/s11999-011-2143-0 10.1088/1742-6596/13/1/074 |
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| Keywords | Retrieval analysis Total knee arthroplasty Polyethylene wear Micro-computed tomography |
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| References | Knowlton, Wimmer (bb0040) 2013 Apr; 101 Teeter, Naudie, Bourne, Holdsworth (bb0030) 2012 Jul; 470 Bills, Brown, Jiang, Blunt (bb0050) 2005; 13 McKellop (bb0010) 2007 Dec; 28 Naudie, Ammeen, Engh, Rorabeck (bb0045) 2007 Jan; 15 Engh, Zimmerman, Hopper, Engh (bb0015) 2013 Jan; 471 Teeter, Naudie, Charron, Holdsworth (bb0020) 2010 Feb; 25 Teeter, Milner, MacDonald, Naudie (bb0025) 2013 Aug; 227 Hood, Wright, Burstein (bb0005) 1983 Sep; 17 Muratoglu, Perinchief, Bragdon, O'Connor, Konrad, Harris (bb0055) 2003 May; 410 Teeter, Naudie, Milner, Holdsworth (bb0035) 2011 Apr; 26 Teeter (10.1016/j.knee.2014.04.009_bb0025) 2013; 227 Teeter (10.1016/j.knee.2014.04.009_bb0035) 2011; 26 Hood (10.1016/j.knee.2014.04.009_bb0005) 1983; 17 Engh (10.1016/j.knee.2014.04.009_bb0015) 2013; 471 Bills (10.1016/j.knee.2014.04.009_bb0050) 2005; 13 McKellop (10.1016/j.knee.2014.04.009_bb0010) 2007; 28 Teeter (10.1016/j.knee.2014.04.009_bb0020) 2010; 25 Naudie (10.1016/j.knee.2014.04.009_bb0045) 2007; 15 Teeter (10.1016/j.knee.2014.04.009_bb0030) 2012; 470 Muratoglu (10.1016/j.knee.2014.04.009_bb0055) 2003; 410 Knowlton (10.1016/j.knee.2014.04.009_bb0040) 2013; 101 |
| References_xml | – volume: 17 start-page: 829 year: 1983 Sep end-page: 842 ident: bb0005 article-title: Retrieval analysis of total knee prostheses: a method and its application to 48 total condylar prostheses publication-title: J Biomed Mater Res – volume: 28 start-page: 5049 year: 2007 Dec end-page: 5057 ident: bb0010 article-title: The lexicon of polyethylene wear in artificial joints publication-title: Biomaterials – volume: 227 start-page: 884 year: 2013 Aug end-page: 889 ident: bb0025 article-title: Manufacturing lot affects polyethylene tibial insert volume, thickness, and surface geometry publication-title: Proc Inst Mech Eng H – volume: 470 start-page: 1847 year: 2012 Jul end-page: 1854 ident: bb0030 article-title: How do CAD models compare with reverse engineered manufactured components for use in wear analysis? publication-title: Clin Orthop Relat Res – volume: 26 start-page: 497 year: 2011 Apr end-page: 503 ident: bb0035 article-title: Determination of reference geometry for polyethylene tibial insert wear analysis publication-title: J Arthroplasty – volume: 15 start-page: 53 year: 2007 Jan end-page: 64 ident: bb0045 article-title: Wear and osteolysis around total knee arthroplasty publication-title: J Am Acad Orthop Surg – volume: 13 start-page: 316 year: 2005 end-page: 319 ident: bb0050 article-title: A metrology solution for the orthopaedic industry publication-title: J Phys Conf Ser – volume: 471 start-page: 86 year: 2013 Jan end-page: 93 ident: bb0015 article-title: Can microcomputed tomography measure retrieved polyethylene wear? 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| Snippet | Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable information.... Abstract Background Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable... Background Quantitative measurements of damage and wear in orthopaedic components retrieved from patients during revision surgery can provide valuable... |
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| SubjectTerms | Algorithms Device Removal Geometry Humans Knee Prosthesis Manufacturers Manufacturing Medical research Methods Micro-computed tomography Orthopedics Polyethylene Polyethylene wear Principal components analysis Prosthesis Design Retrieval analysis Software utilities Studies Total knee arthroplasty X-Ray Microtomography |
| Title | Surface extraction can provide a reference for micro-CT analysis of retrieved total knee implants |
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