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Michel A, Nguyen VH, Bosc R, Vayron R, Hernigou P, Naili S, Haiat G. Finite element model of the impaction of a press-fitted acetabular cup. Med Biol Eng Comput 2016; 55:781-791. [PMID: 27491803 DOI: 10.1007/s11517-016-1545-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 07/03/2016] [Indexed: 01/07/2023]
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 (R 2 = 0.94) and the indicator (R 2 = 0.95). The results show the potential of impact analyses to retrieve the bone-implant contact properties.
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Affiliation(s)
- Adrien Michel
- Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - Vu-Hieu Nguyen
- Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - Romain Bosc
- 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
| | - Romain Vayron
- Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - Philippe Hernigou
- 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
| | - Salah Naili
- Université Paris Est, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France
| | - Guillaume Haiat
- CNRS, Laboratoire de Modélisation et de Simulation Multi‑Echelle, UMR CNRS 8208, 61 avenue du Général de Gaulle, 94010, Créteil, France.
- École de technologie supérieure, 1100 Notre-Dame Street West, Montreal, QC, H3C 1K3, Canada.
- Research Center, Hôpital du Sacré-Cœur de Montréal, 5400, Gouin Boul. West, Montreal, QC, H4J 1C5, Canada.
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Michel A, Bosc R, Sailhan F, Vayron R, Haiat G. Ex vivo estimation of cementless acetabular cup stability using an impact hammer. Med Eng Phys 2015; 38:80-6. [PMID: 26671784 DOI: 10.1016/j.medengphy.2015.10.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 08/17/2015] [Accepted: 10/15/2015] [Indexed: 11/29/2022]
Abstract
Obtaining primary stability of acetabular cup (AC) implants is one of the main objectives of press-fit procedures used for cementless hip arthroplasty. The aim of this study is to investigate whether the AC implant primary stability can be evaluated using the signals obtained with an impact hammer. A hammer equipped with a force sensor was used to impact the AC implant in 20 bovine bone samples. For each sample, different stability conditions were obtained by changing the cavity diameter. For each configuration, the inserted AC implant was impacted four times with a maximum force comprised between 2500 and 4500 N. An indicator I was determined based on the partial impulse estimation and the pull-out force was measured. The implant stability and the value of the indicator I reached a maximum value for an interference fit equal to 1 mm for 18 out of 20 samples. When pooling all samples and all configurations, the implant stability and I were significantly correlated (R(2) = 0.83). The AC implant primary stability can be assessed through the analysis of the impact force signals obtained using an impact hammer. Based on these ex vivo results, a medical device could be developed to provide a decision support system to the orthopedic surgeons.
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Affiliation(s)
- Adrien Michel
- CNRS, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208,61 Avenue du Général de Gaulle, Créteil 94010, France
| | - Romain Bosc
- Service de Chirurgie Orthopédique et Traumatologique, Hôpital Henri Mondor AP-HP, CHU Paris 12, Université Paris-Est, 51 avenue du Maréchal de Lattre de Tassigny, Créteil 94000, France
| | - Frédéric Sailhan
- Service de Chirurgie Ostéo-articulaire et carcinologique, Clinique Arago, 54, boulevard Saint-Jacques, 75014 Paris, France
| | - Romain Vayron
- CNRS, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208,61 Avenue du Général de Gaulle, Créteil 94010, France
| | - Guillaume Haiat
- CNRS, Laboratoire de Modélisation et de Simulation Multi-Echelle, UMR CNRS 8208,61 Avenue du Général de Gaulle, Créteil 94010, France; Ecole de Technologie Superieure, Department of Mechanical Engineering, 1100 Rue Notre-Dame Ouest, Montréal, QC H3C 1K3, Canada.
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