title: Trapeziometacarpal joint implants can be evaluated by roentgen stereophotogrammetric analysis.
abstract: Both marker-based roentgen stereophotogrammetric analysis (RSA) and model-based RSA have been helpful evaluation tools in hip and knee arthroplasty. The purpose of this study was to test both model-based and marker-based RSA in the evaluation of total joint prostheses of the trapeziometacarpal joint. In a phantom study, the precision of marker-based RSA was tested with a cemented polyethylene cup and compared with the precision of model-based RSA in an uncemented Elektra screw cup. The precision of model-based RSA of the metacarpal stem was tested using an uncemented Elektra metacarpal stem. In a clinical study 11 patients had double stereo radiographs followed by RSA analysis. The precision of translation in both marker-based and model-based RSA was sufficient for clinical use, but rotation cannot be estimated with sufficient precision.
authors.affiliation: Department of Orthopaedics, Section of Hand Surgery, Regional Hospital Holstebro, Holstebro, Denmark. tbhansen@dadlnet.dk
authors.forename: T B
authors.initials: TB
authors.lastname: Hansen
authors.forename: K
authors.initials: K
authors.lastname: Larsen
authors.forename: L
authors.initials: L
authors.lastname: Bjergelund
authors.forename: M
authors.initials: M
authors.lastname: Stilling
mesh_terms: D019643:Arthroplasty, Replacement; D050824:Carpal Joints / Q000601:surgery*; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D050279:Metacarpal Bones / Q000601:surgery*; D019047:Phantoms, Imaging; D010780:Photogrammetry; D011857:Radiographic Image Interpretation, Computer-Assisted; D013933:Thumb / Q000601:surgery; D014025:Titanium; D051222:Trapezium Bone / Q000601:surgery*
chemical_list: D014025:Titanium