Francesco Castagnini1, Barbara Bordini2, Makiko Yorifuji2,3, Federico Giardina4, Simone Natali4, Francesco Pardo4, Francesco Traina4. 1. Ortopedia-Traumatologia e Chirurgia Protesica e dei Reimpianti d'Anca e di Ginocchio, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy, francescocastagnini@hotmail.it. 2. Laboratorio di Tecnologia Medica, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy. 3. Department of Orthopedic Surgery, Tokyo Medical University, Tokyo, Japan. 4. Ortopedia-Traumatologia e Chirurgia Protesica e dei Reimpianti d'Anca e di Ginocchio, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.
Abstract
OBJECTIVE: Highly porous titanium cups have been recently introduced, with contradictory outcomes. A retrospective consecutive case series involving bilateral metachronous total hip arthroplasties (THA) performed with 2 different cups, i.e., Fixa (F) and Fixa Ti-Por (T) (Adler Ortho, Milan, Italy), and the same stem, was evaluated. T sockets, manufactured using electron beam melting, were supposed to prove superior in terms of clinical results, survival rates, and radiographic parameters in comparison to hydroxyapatite-coated F cups with conventional porosity. SUBJECTS AND METHODS: Twenty-four bilateral metachronous THAs with an F cup on one side and a T socket on the other side were evaluated. Preoperative and postoperative Harris hip scores (HHS) were collected for every patient. Radiographic signs of loosening were assessed. The radiographic signs of osseointegration (radiolucent lines, superolateral buttress, inferomedial buttress, radial trabeculae, and stress shielding) were evaluated. RESULTS: No intraoperative complications occurred. The mean HHS score was excellent and comparable in both groups. At the mean follow-up of 134 months (F) and 79 months (T), no cup or liner revisions were performed. No radiographic signs of loosening were reported. All of the patients revealed 3 parameters of good bony ingrowth at least. Both groups showed similar radiographic parameters regarding osseointegration, which were stable over the time. Stress shielding was more evident in the T cohort (p =0.07). CONCLUSION: Highly porous titanium cups produced using an additive manufacturing and electron beam melting technology achieved reliable midterm clinical and radiographic results not inferior to those of second-generation cups.
OBJECTIVE: Highly porous titanium cups have been recently introduced, with contradictory outcomes. A retrospective consecutive case series involving bilateral metachronous total hip arthroplasties (THA) performed with 2 different cups, i.e., Fixa (F) and Fixa Ti-Por (T) (Adler Ortho, Milan, Italy), and the same stem, was evaluated. T sockets, manufactured using electron beam melting, were supposed to prove superior in terms of clinical results, survival rates, and radiographic parameters in comparison to hydroxyapatite-coated F cups with conventional porosity. SUBJECTS AND METHODS: Twenty-four bilateral metachronous THAs with an F cup on one side and a T socket on the other side were evaluated. Preoperative and postoperative Harris hip scores (HHS) were collected for every patient. Radiographic signs of loosening were assessed. The radiographic signs of osseointegration (radiolucent lines, superolateral buttress, inferomedial buttress, radial trabeculae, and stress shielding) were evaluated. RESULTS: No intraoperative complications occurred. The mean HHS score was excellent and comparable in both groups. At the mean follow-up of 134 months (F) and 79 months (T), no cup or liner revisions were performed. No radiographic signs of loosening were reported. All of the patients revealed 3 parameters of good bony ingrowth at least. Both groups showed similar radiographic parameters regarding osseointegration, which were stable over the time. Stress shielding was more evident in the T cohort (p =0.07). CONCLUSION: Highly porous titanium cups produced using an additive manufacturing and electron beam melting technology achieved reliable midterm clinical and radiographic results not inferior to those of second-generation cups.
Authors: Douglas D R Naudie; Lyndsay Somerville; Abigail Korczak; Xunhua Yuan; Richard W McCalden; David Holdsworth; Robert B Bourne Journal: J Arthroplasty Date: 2013-08-13 Impact factor: 4.757
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Authors: William J Long; Samir Nayyar; Kevin K Chen; David Novikov; Roy I Davidovitch; Jonathan M Vigdorchik Journal: Arthroplast Today Date: 2018-01-02
Authors: Francesco Pardo; Barbara Bordini; Francesco Castagnini; Federico Giardina; Cesare Faldini; Francesco Traina Journal: J Mater Sci Mater Med Date: 2021-01-20 Impact factor: 3.896