Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing

SUMMARY: Accurate implant sizing is one of the major determinants in defining the success of total knee arthroplasty (TKA). Current TKA implants are based on Caucasian knee morphometry which is well documented to be larger than Asian knees. Even more, with regards to sizing, implant mismatch tends t...

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Autores principales:	Ab-Rahman,Shaifuzain, Radhakrishnan,Sanjeevan, Shokri,AmranAhmed, Ahmad,Muhammad Rajaei, Ismail,Ahmad Filza, Hashim,Hairul Anuar, Muzaffar,Tengku
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2021
Materias:	Morphometric measurement FemaleMalaysian knees Total knee arthroplasty Knee dimensions
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000100192
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spelling	oai:scielo:S0717-950220210001001922021-03-01Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant SizingAb-Rahman,ShaifuzainRadhakrishnan,SanjeevanShokri,AmranAhmedAhmad,Muhammad RajaeiIsmail,Ahmad FilzaHashim,Hairul AnuarMuzaffar,Tengku Morphometric measurement FemaleMalaysian knees Total knee arthroplasty Knee dimensions SUMMARY: Accurate implant sizing is one of the major determinants in defining the success of total knee arthroplasty (TKA). Current TKA implants are based on Caucasian knee morphometry which is well documented to be larger than Asian knees. Even more, with regards to sizing, implant mismatch tends to be more evident in the female population. This study was designed to evaluate the distal femur dimensions of Malaysian female patients who underwent TKA in our institution and to compare them with the current prosthetic system in use. A total of 199 female patients (207 knees) who underwent TKA were enrolled in this study. Intraoperatively, the AP dimensions (medial and lateral condyles) and mediolateral (ML) width were measured. Known dimension of the femoral component of the prosthetic knee system currently in use were compared with the morphological data. The average femoral component overhang was 2.11 mm (SD 3.94 mm). There was significant difference between the mean ML width of the resected femur and the femoral component (p<0.01). Analysis also revealed a significant positive and weak relationship between both, AP (medial and lateral) and ML dimension. The aspect ratio (ML/AP) of the native femur was generally smaller than the implant aspect ratio which is likely to cause overhang in our population. In general, this study shows that the knees of our female sub-population are even narrower than the other Asian female knees from previous studies. Implants should be designed based on the morphological data of the local population. Implant manufactures should tailor them to accommodate a smaller change in ML width for an increment in the AP length and provide several ML widths for one AP length to obtain a better fitting prosthesis hence curbing the problem of ML overhang.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.39 n.1 20212021-02-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000100192en10.4067/S0717-95022021000100192
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Morphometric measurement FemaleMalaysian knees Total knee arthroplasty Knee dimensions
spellingShingle	Morphometric measurement FemaleMalaysian knees Total knee arthroplasty Knee dimensions Ab-Rahman,Shaifuzain Radhakrishnan,Sanjeevan Shokri,AmranAhmed Ahmad,Muhammad Rajaei Ismail,Ahmad Filza Hashim,Hairul Anuar Muzaffar,Tengku Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing
description	SUMMARY: Accurate implant sizing is one of the major determinants in defining the success of total knee arthroplasty (TKA). Current TKA implants are based on Caucasian knee morphometry which is well documented to be larger than Asian knees. Even more, with regards to sizing, implant mismatch tends to be more evident in the female population. This study was designed to evaluate the distal femur dimensions of Malaysian female patients who underwent TKA in our institution and to compare them with the current prosthetic system in use. A total of 199 female patients (207 knees) who underwent TKA were enrolled in this study. Intraoperatively, the AP dimensions (medial and lateral condyles) and mediolateral (ML) width were measured. Known dimension of the femoral component of the prosthetic knee system currently in use were compared with the morphological data. The average femoral component overhang was 2.11 mm (SD 3.94 mm). There was significant difference between the mean ML width of the resected femur and the femoral component (p<0.01). Analysis also revealed a significant positive and weak relationship between both, AP (medial and lateral) and ML dimension. The aspect ratio (ML/AP) of the native femur was generally smaller than the implant aspect ratio which is likely to cause overhang in our population. In general, this study shows that the knees of our female sub-population are even narrower than the other Asian female knees from previous studies. Implants should be designed based on the morphological data of the local population. Implant manufactures should tailor them to accommodate a smaller change in ML width for an increment in the AP length and provide several ML widths for one AP length to obtain a better fitting prosthesis hence curbing the problem of ML overhang.
author	Ab-Rahman,Shaifuzain Radhakrishnan,Sanjeevan Shokri,AmranAhmed Ahmad,Muhammad Rajaei Ismail,Ahmad Filza Hashim,Hairul Anuar Muzaffar,Tengku
author_facet	Ab-Rahman,Shaifuzain Radhakrishnan,Sanjeevan Shokri,AmranAhmed Ahmad,Muhammad Rajaei Ismail,Ahmad Filza Hashim,Hairul Anuar Muzaffar,Tengku
author_sort	Ab-Rahman,Shaifuzain
title	Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing
title_short	Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing
title_full	Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing
title_fullStr	Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing
title_full_unstemmed	Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing
title_sort	unique morphology of intraoperative measurement of distal femur in northern malaysian females and its correlation with total knee arthroplasty implant sizing
publisher	Sociedad Chilena de Anatomía
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000100192
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Unique Morphology of Intraoperative Measurement of Distal Femur in Northern Malaysian Females and its Correlation With Total Knee Arthroplasty Implant Sizing

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