Prospective longitudinal study of one hundred patients with total hip arthroplasty using a second-generation cementless dual-mobility cup.
OBJECTIVE
The aim of our study was to assess the radio-clinical results, mid-term survivorship and dislocation rate of a new-generation dual-mobility cup.


METHODS
The first 100 patients (104 primary total hip arthroplasties) who were implanted with a new-generation cementless dual-mobility cup (Sunfit TH, Serf, Décines) were included in our study, with a minimum follow-up of five years.


RESULTS
Average follow-up was six years ± 0.44 (5-7). At last follow-up, the Harris and PMA scores were significantly improved, from 56 to 94 and 13 to 17 respectively (p < 0.001). No radiolucent line could be observed. There were no cases of prosthetic or intraprosthetic dislocation in our series. Survivorship without cup loosening as the endpoint was 100 %.


CONCLUSIONS
This study confirmed the interest of dual mobility in preventing prosthetic hip dislocation. Intraprosthetic dislocation is a complication that seems to have been resolved in the mid-term follow-up.
Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopedique et Traumatologique, 165 Chemin Grand Revoyet, 69495, Pierre-Bénite, France.
Thibault
T
Vermersch
Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopedique et Traumatologique, 165 Chemin Grand Revoyet, 69495, Pierre-Bénite, France. anthony.viste@chu-lyon.fr.|Université de Lyon, 69622, Lyon, France. anthony.viste@chu-lyon.fr.|Université Claude Bernard Lyon 1, 69100, Villeurbanne, France. anthony.viste@chu-lyon.fr.|IFSTTAR, UMRT_ 9406, Laboratoire de Biomécanique et Mécanique des Chocs, 69675, Bron, France. anthony.viste@chu-lyon.fr.
Anthony
A
Viste
Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopedique et Traumatologique, 165 Chemin Grand Revoyet, 69495, Pierre-Bénite, France.
Romain
R
Desmarchelier
Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Service de Chirurgie Orthopedique et Traumatologique, 165 Chemin Grand Revoyet, 69495, Pierre-Bénite, France.|Université de Lyon, 69622, Lyon, France.|Université Claude Bernard Lyon 1, 69100, Villeurbanne, France.|IFSTTAR, UMRT_ 9406, Laboratoire de Biomécanique et Mécanique des Chocs, 69675, Bron, France.
Michel-Henri
MH
Fessy
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D001843:Bone Cements; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000209:etiology / Q000517:prevention & control; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design; D011859:Radiography; D015996:Survival Rate
D001843:Bone Cements
Cementless; Dislocation; Dual-mobility cup; Titanium-hydroxyapatite coating