of the




of Dual Mobility invented in 1975 by Professor Gilles Bousquet from Saint-Etienne University Hospital and Mr. André Rambert, founder of SERF, relies on two fundamental principles in orthopaedics.

The idea

The first mobility

The first mobility enables mobility between a liner and a femoral head according to the Charnley concept: a small diameter head to reduce the wear volume and a layer of thick polyethylene.

The second mobility

The second mobility is the high mobility between a liner and an acetabular cup. It is close to the actual diameter of the femoral head.
This is based on the McKee-Farrar concept which advocates for the use of a large diameter head in order to increase the range of motion and reduce the risk of dislocation at the same time. This reduces the risk of instability.

A French


In the 1970s, the incidence of recurrence after a first episode of reduced dislocation varied between 25% and 60%, depending on the series.

This is why, in 1975, Mr. André RAMBERT (Founder of the SERF company) and Prof. Gilles BOUSQUET (Department Head at Saint-Etienne University Hospital) pooled their skills to develop the dual mobility concept, which now has 45 years behind it.

Prof. Gilles BOUSQUET
(1936 – 1996)

(1927 – 2018)

The history of the DUAL MOBILITY concept is closely linked to SERF.

Since its invention in 1976, SERF has been developing and marketing it.
Based on the clinical experience gained, the DUAL MOBILITY concept has evolved and been optimised for increased reliability and quality of implants over the years.

Today, SERF is the only company that can boast such familiarity with Dual Mobility,
with over 45 years of optimisation and experience.

Visit the dedicated page to learn more about our range of dual mobility acetabular cups

Novae range

They speak about it

Among the 80 articles available on our dual mobility cup, we have selected more than 38 articles that highlight the interest and reliability of our concept and the optimizations developed on the dual mobility.
  1. Adam P, Farizon F, Fessy M-H. [Dual articulation retentive acetabular liners and wear : surface analysis of 40 retrieved polyethylene implants].
    Rev Chir Orthop Reparatrice Appar Mot. nov 2005;91(7):627 36.
  2. Adam P. Contribution à l’étude des arthroplasties totales de hanche à double mobilité. Analyse clinique et mécanique. Confrontation des données expérimentales à l’étude des pièces ayant fonctionné in vivo [Internet].
    2006. Disponible sur :
  3. Bel J-C, Carret J-P. Total hip arthroplasty with minimal invasive surgery in elderly patients with neck of femur fractures: our institutional experience. Injury.
    janv 2015;46 Suppl 1:S13-17.
  4. Bouvier J. Etude à court terme des prothèses totales de hanche sans ciment. Cotyle NOVAE-Tige SAGITTA.
    Travail du Service d’Orthopédie Traumatologie du Centre Hospitalier d’Aubenas (07200). 1997.
  5. Boyer B. Modélisation du fonctionnement de la Prothèse Totale de Hanche Double Mobilité – Compréhension des comportements biomécanique et tribologique.
    [Internet]. 2014. Disponible sur:
  6. Boyer B, Neri T, Di Iorio A, Geringer J, Philippot R, Farizon F. The linear penetration rate is not relevant for evaluating wear of dual mobility cups: an explant study.
    Int Orthop. mars 2017;41(3):599 603.
  7. Boyer B, Neri T, Geringer J, Di Iorio A, Philippot R, Farizon F. Understanding wear in dual mobility total hip replacement: first generation explant wear patterns.
    Int Orthop. mars 2017;41(3):529 33.
  8. Boyer B, Philippot R, Geringer J, Farizon F. Primary total hip arthroplasty with dual mobility socket to prevent dislocation: a 22-year follow-up of 240 hips.
    Int Orthop. mars 2012;36(3):511 8.
  9. CIRILLI A. Reconstruction osseuse apres descellement de protheses totales de hanche cimentees : a propos de 46 cas de reprise par prothese sans ciment de bousquet.
  10. Dangin A, Boulat S, Farizon F, Philippot R. Prevention of Dislocation Risk During Hip Revision Surgery with the Dual Mobility Concept; Study of a New Generation of Dual Mobility Cups.
    Surg Technol Int. 26 oct 2016;29:314 9.
  11. Delaunay CP, Bonnomet F, Clavert P, Laffargue P, Migaud H. THA using metal-on-metal articulation in active patients younger than 50 years.
    Clin Orthop Relat Res. févr 2008;466(2):340 6.
  12. El Blidi S. Le traitement des luxations récidivantes de prothèses totales de hanche par le cotyle rétentif de Bousquet.
    [Université de Caen]; 1992.
  13. F. Lemonne, P. Bizot, R. Nizard, E. Van Gaver, G.-F. Penneçot, L. Sedel. Traitement chirurgical d’une agénésie fémorale sévère chez l’adulte.
    Revue de Chirurgie Orthopédique et Traumatologique. nov 2003;1304(7):580.
  14. Farizon F, de Lavison R, Azoulai JJ, Bousquet G. Results with a cementless alumina-coated cup with dual mobility. A twelve-year follow-up study.
    Int Orthop. 1998;22(4):219 24.
  15. Fessy M-H. La double mobilité.
    Revue de Chirurgie Orthopédique et Traumatologique. nov 2010;96(7):891 8.
  16. Fessy M-H. Dual Mobility Concept – Bipolar Hip Replacement. In: Bentley G, éditeur.
    European Surgical Orthopaedics and Traumatology: The EFORT Textbook [Internet]. Berlin, Heidelberg: Springer Berlin Heidelberg; 2014. p. 2635‑47. Disponible sur:
  17. Fessy M-H. La double mobilité. Un concept stéphanois.
    Maitrise orthopédique. 2006.
  18. Kleeman L, Lachiewicz P. Dual-mobility components obviate the need for constrained components in revision total hip arthroplasty–Affirms.
    Seminars in Arthroplasty. 1 déc 2016;27(4):256 60.
  19. Mohammed R, Hayward K, Mulay S, Bindi F, Wallace M. Outcomes of dual-mobility acetabular cup for instability in primary and revision total hip arthroplasty.
    J Orthop Traumatol. mars 2015;16(1):913.
  20. Neri T, Boyer B, Batailler C, Klasan A, Lustig S, Philippot R, et al. Dual mobility cups for total hip arthroplasty: tips and tricks.
    SICOT J. 2020;6:17.
  1. Philippot R, Camilleri JP, Boyer B, Adam P, Farizon F. The use of a dual-articulation acetabular cup system to prevent dislocation after primary total hip arthroplasty: analysis of 384 cases at a mean follow-up of 15 years.
    Int Orthop. août 2009;33(4):927 32.
  2. Philippot R, Boyer B, Farizon F. Intraprosthetic dislocation: a specific complication of the dual-mobility system.
    Clin Orthop Relat Res. mars 2013;471(3):965 70.
  3. KOHLMANN R. L’implant cotyloïdien sans ciment « NOVAE T » à crochet obturateur dans les descellements aseptiques et les dysplasies luxantes. Revue des 28 cas opérés au pavillion T. Hopital E.Herriot. LYON. [Lyon]; 1998.
  4. Lecuire F, Benareau I, Rubini J, Basso M. [Intra-prosthetic dislocation of the Bousquet dual mobility socket].
    Rev Chir Orthop Reparatrice Appar Mot. mai 2004;90(3):249 55.
  5. Leiber- Wackenheim F. Reprise acétabulaire par cupule à double mobilité pour luxation recidivante de PTH. A propos de 59 cas à 8 ans de recul.
    [Université de Picardie Jules Verne Faculté de médecine d’Amiens]; 2007.
  6. Leiber-Wackenheim F, Brunschweiler B, Ehlinger M, Gabrion A, Mertl P. Treatment of recurrent THR dislocation using of a cementless dual-mobility cup: a 59 cases series with a mean 8 years’ follow-up.
    Orthop Traumatol Surg Res. févr 2011;97(1):8 13.
  7. Martino ID. Dual mobility cups in total hip arthroplasty.
    WJO. 2014;5(3):180.
  8. Mesko DR, Molloy R, Rueda CH. The dual mobility liner: Is it ready for prime time?
    Seminars in Arthroplasty. 1 sept 2015;26(3):186 9.
  9. Neri T, Boyer B, Geringer J, Di Iorio A, Caton JH, PhiIippot R, et al. Intraprosthetic dislocation of dual mobility total hip arthroplasty: still occurring?
    Int Orthop. mai 2019;43(5):1097 105.
  10. Neri T, Philippot R, Farizon F, Boyer B. Results of primary total hip replacement with first generation Bousquet dual mobility socket with more than twenty five years follow up. About a series of two hundred and twelve hips.
    Int Orthop. mars 2017;41(3):557 61.
  11. Neri T, Philippot R, Klasan A, Putnis S, Leie M, Boyer B, et al. Dual mobility acetabular cups for total hip arthroplasty: advantages and drawbacks.
    Expert Rev Med Devices. nov 2018;15(11):835 45.
  12. Philippot R, Adam P, Farizon F, Fessy M-H, Bousquet G. Survie à dix ans d’une cupule double mobilité non cimentée.
    Revue de Chirurgie Orthopédique et Réparatrice de l’Appareil Moteur. 1 juin 2006;92(4):326 31.
  13. Vielpeau C, Lebel B, Ardouin L, Burdin G, Lautridou C. The dual mobility socket concept: experience with 668 cases.
    Int Orthop. févr 2011;35(2):225 30.
  14. Leclercq S, El Blidi S, Aubriot JH. Traitement de la luxation récidivante de prothèse totale de hanche par le cotyle de Bousquet. A propos de 13 cas.
    Revue De Chirurgie Orthopedique Et Reparatrice De L’appareil Moteur. 1995;1995, 81, 389 394.
  15. Philippot R, Baulot E, Vermorel P-H, Genestoux V, Alixant P, Martz P, et al. Outcomes of Augmented Dual Mobility Acetabular Cups.
    Surg Technol Int. 10 nov 2019;35:274 9.
  16. Philippot R, Neri T, Boyer B, Viard B, Farizon F. Bousquet dual mobility socket for patient under fifty years old. More than twenty year follow-up of one hundred and thirty one hips.
    Int Orthop. mars 2017;41(3):589 94.
  17. Pineau V, Lebel B, Gouzy S, Dutheil J-J, Vielpeau C. Dual mobility hip arthroplasty wear measurement: Experimental accuracy assessment using radiostereometric analysis (RSA).
    Orthop Traumatol Surg Res. oct 2010;96(6):609 15.
  18. Wegrzyn J, Malatray M, Al-Qahtani T, Pibarot V, Confavreux C, Freyer G. Total Hip Arthroplasty for Periacetabular Metastatic Disease. An Original Technique of Reconstruction According to the Harrington Classification.
    J Arthroplasty. août 2018;33(8):2546 55.