Dual mobility cups associated with proximal femoral replacement in nontumoral indications: Results and complications - 13/04/22
, Matthieu Malatray a, Vincent Pibarot a, Julien Wegrzyn b
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Abstract |
Introduction |
Reconstruction of extensive proximal femoral bone loss is a major challenge during total hip arthroplasty (THA). Proximal femoral replacement (PFR), initially used for bone tumors, is an alternative to allograft-prosthetic composite reconstruction. However, PFRs present a high complication rate, particularly related to dislocation. Moreover, dual mobility cups (DMCs) are effective in preventing dislocation, and no study has yet assessed their association with PFRs. Therefore, the aim of this study was to assess the dislocation and complication rates in THA using PFRs with DMCs.
Hypothesis |
The use of a DMC decreases the dislocation rate associated with PFRs in nontumoral indications.
Methods |
From 2008 to 2017, 66 PFRs associated with a DMC (40 women, mean age=71 years [26–94]) were included in our total joint registry and retrospectively reviewed. The main indications were complex periprosthetic and pertrochanteric fractures (26 THAs, 40%), aseptic loosening (22 THAs, 33%) and periprosthetic joint infections (18 THAs, 27%). A single design of PFR implant was used (Global Modular Replacement System (GMRS), Stryker, Mahwah, NJ, USA) with an uncemented stem in 54 THAs (82%).
Results |
Eighteen complications (27%) were reported at a mean follow-up of 4.6 years [2–10]: 5 dislocations (7.5%), 9 periprosthetic joint infections (13.6%), 2 aseptic loosening (3%) and 2 femur fractures (3%). Overall survivorship at 5 years was 72% (95% CI: 58–82). Survivorship free from dislocation was 94% (95% CI: 85–98) at 1 year. The mean Harris Hip Score was 70±16.4 [26–100] at latest follow-up.
Conclusion |
The use of DMCs limits the risk of PFR dislocation, in comparison to other series in the literature that used large femoral heads, without compromising implant survivorship. In addition, DMCs make it possible to overcome the potential risks of mechanical failure associated with constrained acetabular components.
Level of Evidence |
IV; retrospective cohort.
El texto completo de este artículo está disponible en PDF.Keywords : Dual mobility cup, Proximal femoral bone loss, Proximal femoral replacement, Dislocation, Complication
Esquema
Vol 108 - N° 2
Artículo 103029- avril 2022 Regresar al número
Artículo precedente
- Cementless hydroxyapatite-coated stem with dual mobility and posterior approach in over-80 year-old patients with osteoarthritis: Rates of dislocation and periprosthetic fracture at a mean 8 years’ follow-up
- Vincent Belgaïd, Anthony Viste, Michel-Henri Fessy
- Influence of dual-mobility acetabular implants on revision and survivorship of cup and Kerboull-type reinforcement ring constructs in aseptic acetabular loosening
- Olivier Bozon, Louis Dagneaux, Thomas Sanchez, Florent Gaillard, Mazen Hamoui, François Canovas
Bienvenido a EM-consulte, la referencia de los profesionales de la salud.