Size and shape of the resection surface geometry of the osteoarthritic knee in relation to total knee replacement design.
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| Title: | Size and shape of the resection surface geometry of the osteoarthritic knee in relation to total knee replacement design. |
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| Authors: | Fitzpatrick CK (AUTHOR), FitzPatrick DP (AUTHOR), Auger DD (AUTHOR), Fitzpatrick, C K1 (AUTHOR), FitzPatrick, D P (AUTHOR), Auger, D D (AUTHOR) |
| Source: | Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing). Aug2008, Vol. 222 Issue 6, p923-932. 10p. |
| Abstract: | This study examines the resection surface geometry of the femur, tibia, and patella in relation to the design of total knee implants. Using a technique known as principal component analysis (PCA), the variation in the resection geometry of the knee was summarized. Of the total variation of the knee, 58 per cent was due to variation in size and 14 per cent was due to varying femoral intercondylar notch width. A PCA was performed on each bone separately and it was found that 60 per cent, 76 per cent and 71 per cent of variation was due to size for the femur, tibia, and patella respectively. Femoral and tibial size were highly correlated (r = 0.95) while patellar size had poorer correlation with both femoral and tibial size (r < 0.7). Simple linear dimensions (femoral epicondylar width or tibial mediolateral width) were reliable indicators of knee size. The effect of shape variation, which is generally not accounted for in implant design, was measured. The resected surfaces of each subject were compared with a model of the resection surfaces of the knee which varied in size but not shape. The maximum overhang and underhang of the model on the resection surfaces were measured. There was average maximum model overhang of 3.6 mm and underhang of 3.9 mm in the femur, 2.3 mm overhang and 1.9 mm underhang in the tibia, and 2.6 mm overhang and 2.5 mm underhang in the patella. The maximum coverage that an implant can be expected to provide for a population is quantified. Implant designs which include some shape as well as size variation improve on the implant fit. [ABSTRACT FROM AUTHOR] |
| Copyright of Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing) is the property of Professional Engineering Publishing 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 105627430 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Size and shape of the resection surface geometry of the osteoarthritic knee in relation to total knee replacement design. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Fitzpatrick+CK%22">Fitzpatrick CK</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22FitzPatrick+DP%22">FitzPatrick DP</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Auger+DD%22">Auger DD</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fitzpatrick%2C+C+K%22">Fitzpatrick, C K</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22FitzPatrick%2C+D+P%22">FitzPatrick, D P</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Auger%2C+D+D%22">Auger, D D</searchLink> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Proceedings+of+the+Institution+of+Mechanical+Engineers+--+Part+H+--+Journal+of+Engineering+in+Medicine+%28Professional+Engineering+Publishing%29%22">Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing)</searchLink>. Aug2008, Vol. 222 Issue 6, p923-932. 10p. – Name: Abstract Label: Abstract Group: Ab Data: This study examines the resection surface geometry of the femur, tibia, and patella in relation to the design of total knee implants. Using a technique known as principal component analysis (PCA), the variation in the resection geometry of the knee was summarized. Of the total variation of the knee, 58 per cent was due to variation in size and 14 per cent was due to varying femoral intercondylar notch width. A PCA was performed on each bone separately and it was found that 60 per cent, 76 per cent and 71 per cent of variation was due to size for the femur, tibia, and patella respectively. Femoral and tibial size were highly correlated (r = 0.95) while patellar size had poorer correlation with both femoral and tibial size (r < 0.7). Simple linear dimensions (femoral epicondylar width or tibial mediolateral width) were reliable indicators of knee size. The effect of shape variation, which is generally not accounted for in implant design, was measured. The resected surfaces of each subject were compared with a model of the resection surfaces of the knee which varied in size but not shape. The maximum overhang and underhang of the model on the resection surfaces were measured. There was average maximum model overhang of 3.6 mm and underhang of 3.9 mm in the femur, 2.3 mm overhang and 1.9 mm underhang in the tibia, and 2.6 mm overhang and 2.5 mm underhang in the patella. The maximum coverage that an implant can be expected to provide for a population is quantified. Implant designs which include some shape as well as size variation improve on the implant fit. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing) is the property of Professional Engineering Publishing 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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| RecordInfo | BibRecord: BibEntity: Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 923 Titles: – TitleFull: Size and shape of the resection surface geometry of the osteoarthritic knee in relation to total knee replacement design. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Fitzpatrick CK – PersonEntity: Name: NameFull: FitzPatrick DP – PersonEntity: Name: NameFull: Auger DD – PersonEntity: Name: NameFull: Fitzpatrick, C K – PersonEntity: Name: NameFull: FitzPatrick, D P – PersonEntity: Name: NameFull: Auger, D D IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2008 Type: published Y: 2008 Identifiers: – Type: issn-print Value: 09544119 Numbering: – Type: volume Value: 222 – Type: issue Value: 6 Titles: – TitleFull: Proceedings of the Institution of Mechanical Engineers -- Part H -- Journal of Engineering in Medicine (Professional Engineering Publishing) Type: main |
| ResultId | 1 |
