title: Reliability of a PowerPoint method for wear measurement after total hip arthroplasty: a retrieval study using 3-dimensional laser scanning.
abstract: The purpose of this study was to evaluate the reliability of the PowerPoint (PP) (2007 Version; Microsoft, Redmond, Wash) method for measuring polyethylene liner wear after total hip arthroplasty. Seventeen retrieved polyethylene liners were included in this study. Wear volumes were calculated using the PP, the Dorr and Wan, and 3-dimensional (3D) laser scanning methods. Spearman correlation coefficients for wear volume results indicated strong correlations between the PP and 3D laser scanning methods (range, 0.89-0.93). On the other hand, Spearman correlation analysis revealed only moderate correlations between the Dorr and Wan and 3D laser scanning methods (range, 0.67-0.77). The PP method can be used to monitor linear wear after total hip arthroplasty and could serve as an alternative method when computerized methods are not available.
authors.affiliation: Department of Orthopaedic Surgery, Seoul Veterans Hospital, Seoul, Korea.
authors.forename: Ho Hyun
authors.initials: HH
authors.lastname: Yun
authors.forename: Won Yong
authors.initials: WY
authors.lastname: Shon
authors.forename: Jung Ro
authors.initials: JR
authors.lastname: Yoon
authors.forename: Jae-Hyuk
authors.initials: JH
authors.lastname: Yang
authors.forename: Deuk-Soo
authors.initials: DS
authors.lastname: Lim
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D021621:Imaging, Three-Dimensional; D007834:Lasers; D008297:Male; D008422:Materials Testing; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design; D015203:Reproducibility of Results; D012984:Software; D055815:Young Adult
chemical_list: D020959:Polyethylene