title: A comparison of cemented and cementless titanium femoral components used for primary total hip arthroplasty: a radiographic and survivorship study.
abstract: Titanium has a low modulus of elasticity that makes it an attractive metal for femoral hip components. We directly compared 2 similar titanium stems, one cemented (n = 102 hips) and the other cementless (n = 78 hips), controlling for the most important surgical variables. The average radiographic follow-up was 6.7 and 7.0 years. Osteolysis below the joint line, zones 2 through 6, was 12.7% (13 of 102) in the cemented group and 0% in the cementless group (P<.001). There were 17 acetabular revisions in each study group. The cementless group had no femoral revisions, whereas 9 acetabular revisions in the cemented group had a simultaneous femoral revision (P=.005). Survivorship, defined as revision of the femur, was 84% for the cemented group and 100% for the cementless group at 10 years. Cementless titanium stems are more resistant to osteolysis and mechanical failure compared with similar cemented titanium stems.
authors.affiliation: Texas Center for Joint Replacement, Plano, Texas, USA. rhemersonjr@MSN.com
authors.forename: Roger H
authors.initials: RH
authors.lastname: Emerson
authors.forename: William C
authors.initials: WC
authors.lastname: Head
authors.forename: Caroline B
authors.initials: CB
authors.lastname: Emerson
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Rosenfeldt
authors.forename: Linda L
authors.initials: LL
authors.lastname: Higgins
mesh_terms: D000077:Acetabulum / Q000601:surgery; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D002484:Cementation / Q000009:adverse effects; D019544:Equipment Failure Analysis; D005269:Femur / Q000601:surgery; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D010014:Osteolysis / Q000209:etiology; D011474:Prosthesis Design; D012086:Reoperation / Q000706:statistics & numerical data; D014025:Titanium
chemical_list: D014025:Titanium