title: Comparison of Different Materials and Proximal Coatings Used for Femoral Components in One-Stage Bilateral Total Hip Arthroplasty.
abstract: To evaluate the mid-term effects of different materials and coatings used for femoral components, we prospectively performed 21 one-stage bilateral total hip arthroplasties using 2 anatomical stems which have identical geometries, randomized to side. One stem was made of Ti6Al4V alloy and had a hydroxyapatite coating on grit-blasted surface proximally, and the other was made of TMZF™ alloy and had a proximal coating of hydroxyapatite in addition to an arc-deposited titanium surface coating. Although we found extensions of radiopaque lines to the surface of coatings of seven grit-blasted stems whereas we found none in the case of the arc-deposited titanium stems, all hips showed excellent clinical and radiological outcomes as shown by radiographs and bone mineral density at the final follow-up, average 5.5 years postoperatively.
authors.affiliation: Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Miyatake
authors.affiliation: Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Jinno
authors.affiliation: Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Koga
authors.affiliation: Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Yamauchi
authors.affiliation: Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Muneta
authors.affiliation: Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Okawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000497:Alloys; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D015519:Bone Density; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D005260:Female; D006622:Hip Prosthesis / Q000706:statistics & numerical data*; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design; D014025:Titanium; D055815:Young Adult
chemical_list: D000497:Alloys; D020099:Coated Materials, Biocompatible; C000609926:Ti-12Mo-6Zr-2Fe alloy; C031462:titanium alloy (TiAl6V4); D017886:Durapatite; D014025:Titanium
keywords: anatomical stem; arc-deposited titanium surface; beta titanium alloy; bone mineral density; grit-blasted surface; stress shielding