title: Finite element model of the impaction of a press-fitted acetabular cup.
abstract: Press-fit surgical procedures aim at providing primary stability to acetabular cup (AC) implants. Impact analysis constitutes a powerful approach to retrieve the AC implant insertion properties. The aim of this numerical study was to investigate the dynamic interaction occurring between the hammer, the ancillary and bone tissue during the impact and to assess the potential of impact analysis to retrieve AC implant insertion conditions. A dynamic two-dimensional axisymmetric model was developed to simulate the impaction of the AC implant into bone tissue assuming friction at the bone-implant interface and large deformations. Different values of interference fit (from 0.5 to 2 mm) and impact velocities (from 1 to 2 m.s-1) were considered. For each configuration, the variation of the force applied between the hammer and the ancillary was analyzed and an indicator I was determined based on the impact momentum of the signal. The simulated results are compared to the experiments. The value of the polar gap decreases with the impact velocity and increases with the interference fit. The bone-implant contact area was significantly correlated with the resonance frequency (R2= 0.94) and the indicator (R2= 0.95). The results show the potential of impact analyses to retrieve the bone-implant contact properties.
authors: Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France.
authors: Adrien
authors: A
authors: Michel
authors: Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France.
authors: Vu-Hieu
authors: VH
authors: Nguyen
authors: Service de Chirurgie Plastique et Reconstructive, Hôpital Henri Mondor AP-HP, CHU Paris 12, Université Paris-Est, 51 avenue du Maréchal de Lattre de Tassigny, 94000, Créteil, France.
authors: Romain
authors: R
authors: Bosc
authors: Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France.
authors: Romain
authors: R
authors: Vayron
authors: Service de Chirurgie Orthopédique, Hôpital Henri Mondor AP-HP, CHU Paris 12, Université Paris-Est, 51 avenue du Maréchal de Lattre de Tassigny, 94000, Créteil, France.
authors: Philippe
authors: P
authors: Hernigou
authors: Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France.
authors: Salah
authors: S
authors: Naili
authors: CNRS, Laboratoire de Modélisation et de Simulation Multi‑Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France. guillaume.haiat@univ-paris-est.fr.|École de technologie supérieure, 1100 Notre-Dame Street West, Montreal, QC, H3C 1K3, Canada. guillaume.haiat@univ-paris-est.fr.|Research Center, Hôpital du Sacré-Cœur de Montréal, 5400, Gouin Boul. West, Montreal, QC, H4J 1C5, Canada. guillaume.haiat@univ-paris-est.fr.
authors: Guillaume
authors: G
authors: Haiat
mesh_terms: D000077:Acetabulum / Q000503:physiopathology*; D020342:Finite Element Analysis; D017276:Friction / Q000502:physiology; D006622:Hip Prosthesis; D006801:Humans; D055595:Mechanical Phenomena
keywords: Acetabular cup; Biomechanics; Bone; Finite element; Hip replacement; Impact