title: Second- and third-generation Omniflex modular femoral stem: results 3 to 8 years after surgery.
abstract: Primary cementless total hip arthroplasty (THA) using the Omniflex modular femoral stem was conducted on 73 hips in 70 patients. The arc deposition (AD)-type stem was used in 26 hips, and the hydroxyapatite (HA)-type stem was used in 47 hips. The mean follow-up period of patients in the AD group was 78 (range, 61-96) months and that of patients in the HA group was 52 (range, 36-61) months. Clinically, improvement in the Harris hip score occurred in all cases. Thigh pain was reported in 3 (11.5%) AD hips and in 1 (2.1%) HA hip. Radiologically, bone ingrowth fixation was seen in 88.5% of the AD group and in 97.9% of the HA group. No subtrochanteric stress shielding, stem migration of > 2 mm, or revision THA occurred. The second- and third- generation Omniflex stems are useful cementless devices resulting in favorable initial biologic fixation and little bone atrophy at mid-term follow-up.
authors.affiliation: Department of Orthopaedic Surgery, Hiroshima University School of Medicine, Hiroshima, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Takahashi
authors.forename: Yuji
authors.initials: Y
authors.lastname: Yasunaga
authors.forename: Takashi
authors.initials: T
authors.lastname: Hisatome
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Ikuta
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Ochi
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D016896:Treatment Outcome