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    An application of principal component analysis to the clavicle and clavicle fixation devices.

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    Authors
    Daruwalla, Zubin J
    Courtis, Patrick
    Fitzpatrick, Clare
    Fitzpatrick, David
    Mullett, Hannan
    Affiliation
    Department of Orthopaedic Surgery, Beaumont Hospital, Dublin, Republic of Ireland. zubinjimmydaruwalla@rcsi.ie
    Issue Date
    2010
    
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    Citation
    An application of principal component analysis to the clavicle and clavicle fixation devices. 2010, 5:21 J Orthop Surg Res
    Journal
    Journal of orthopaedic surgery and research
    URI
    http://hdl.handle.net/10147/127125
    DOI
    10.1186/1749-799X-5-21
    PubMed ID
    20346123
    Abstract
    Principal component analysis (PCA) enables the building of statistical shape models of bones and joints. This has been used in conjunction with computer assisted surgery in the past. However, PCA of the clavicle has not been performed. Using PCA, we present a novel method that examines the major modes of size and three-dimensional shape variation in male and female clavicles and suggests a method of grouping the clavicle into size and shape categories.
    Twenty-one high-resolution computerized tomography scans of the clavicle were reconstructed and analyzed using a specifically developed statistical software package. After performing statistical shape analysis, PCA was applied to study the factors that account for anatomical variation.
    The first principal component representing size accounted for 70.5 percent of anatomical variation. The addition of a further three principal components accounted for almost 87 percent. Using statistical shape analysis, clavicles in males have a greater lateral depth and are longer, wider and thicker than in females. However, the sternal angle in females is larger than in males. PCA confirmed these differences between genders but also noted that men exhibit greater variance and classified clavicles into five morphological groups.
    This unique approach is the first that standardizes a clavicular orientation. It provides information that is useful to both, the biomedical engineer and clinician. Other applications include implant design with regard to modifying current or designing future clavicle fixation devices. Our findings support the need for further development of clavicle fixation devices and the questioning of whether gender-specific devices are necessary.
    Item Type
    Article
    Language
    en
    ISSN
    1749-799X
    ae974a485f413a2113503eed53cd6c53
    10.1186/1749-799X-5-21
    Scopus Count
    Collections
    Beaumont Hospital

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