title: Longevity® constrained cup: an operative technical tip for prevention of metallic ring disassembly.
abstract: Constrained liners are a salvage procedure for treating or preventing recurrent dislocations. The Longevity® constrained liner (Zimmer) has a special design with cut-outs on its circumference for avoiding impingement in certain areas and a metallic constraining ring that has to be impacted. The ring impaction may be technical demanding. We recommend preassembly with the head component prior to seating into the acetabular cup, thus avoiding the soft tissue or cement interference and malposition due to bad angle of incidence of impaction force.
authors.affiliation: University Hospital Santa Lucía, Cartagena - Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Ferrero Manzanal
authors.affiliation: University Hospital Santa Lucía, Cartagena - Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Murcia Asensio
authors.affiliation: University Hospital Reina Sofía, Murcia - Spain.
authors.forename: Raquel
authors.initials: R
authors.lastname: Lax Pérez
authors.affiliation: University Hospital Santa Lucía, Cartagena - Spain.
authors.forename: José Eduardo
authors.initials: JE
authors.lastname: Gil Gómez
authors.affiliation: Institute of Orthopaedics and Traumatology of Barcelona, Barcelona - Spain.
authors.forename: Mariano
authors.initials: M
authors.lastname: Fernández Fairén
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001843:Bone Cements; D006622:Hip Prosthesis; D006801:Humans; D015207:Osteoarthritis, Hip / Q000601:surgery*; D011474:Prosthesis Design
chemical_list: D001843:Bone Cements