title: Maintenance of periprosthetic bone mineral density with a cementless three dimensional straight tapered stem.
abstract: Periprosthetic bone loss is a well documented phenomenon after cementless total hip arthroplasty. We compared the bone mineral density (BMD) in 33 patients using the three dimension taper shape stem and 13 patients with a straight component with a distal taper. Postoperative follow-up was evaluated by dual-energy X-ray absorptiometry. BMD was recorded in seven Gruen zones. BMD was correlated with clinical examination, Harris Hip Score (HHS), Body Mass Index (BMI) and age. Clinical assessment took place at 12 months post operation. Periprosthetic BMD loss using the three dimensional straight tapered stem was consistently much less in comparison with the straight type component with a distal tapered design stem. BMD in Gruen zone 1 was maintained. There was no correlation between periprosthetic bone mineral density and clinical factors.
authors.affiliation: Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe - Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Hayashi
authors.forename: Takayuki
authors.initials: T
authors.lastname: Nishiyama
authors.forename: Takaaki
authors.initials: T
authors.lastname: Fujishiro
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Kanzaki
authors.forename: Shingo
authors.initials: S
authors.lastname: Hashimoto
authors.forename: Ken
authors.initials: K
authors.lastname: Takebe
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kurosaka
mesh_terms: D015502:Absorptiometry, Photon; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D015992:Body Mass Index; D001843:Bone Cements; D015519:Bone Density; D016723:Bone Remodeling / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D015207:Osteoarthritis, Hip / Q000000981:diagnostic imaging / Q000378:metabolism / Q000601:surgery*; D011446:Prospective Studies; D011474:Prosthesis Design
chemical_list: D001843:Bone Cements