Morphology of the radial head: a reverse engineering based evaluation using three-dimensional anatomical data of radial bone.
The proximal part of the radius has a complex shape and dimension that cannot be precisely determined by standard roentgenogram for real three-dimensional anatomical shape which is important for prosthesis design. This study presents a method by which computer tomography (CT) images are combined with the reverse engineering technique to obtain and analyse the three-dimensional inner and outer geometry of the proximal radius. The three-dimensional models were reconstructed from CT images obtained from 40 radial bones and approximated with two- and three-dimensional fitting algorithms based on reverse engineering methods. The mean total length of the radius was 240.0 mm [standard deviation (SD) = 17.3]. The radial head in this study is more likely to be circular with an average diameter of 20.5 mm (SD = 1.9). The outer diameter of the radial neck averages 14.7 mm (SD = 1.0). The thickness of the radial head averages 12.9 mm (SD = 1.4). The intramedullary canal diameter of the radial neck averages 7.4 mm (SD = 1.4). The depth of the fossa at the articular surface averages 1.5 mm (SD = 0.4).
Department of Orthopaedic Surgery, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
B
B
Mahaisavariya
B
B
Saekee
K
K
Sitthiseripratip
P
P
Oris
T
T
Tongdee
E L J
EL
Bohez
J
J
Vander Sloten
D000328:Adult; D000368:Aged; D000465:Algorithms; D001698:Biomedical Engineering / Q000379:methods*; D002102:Cadaver; D017076:Computer-Aided Design; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design / Q000379:methods*; D011859:Radiography; D011884:Radius / Q000033:anatomy & histology* / Q000000981:diagnostic imaging* / Q000601:surgery; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity