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Berthe S, Bahlouli N, Bilasse M, Liverneaux P. Pull-out resistance of connected K-wires for osteosynthesis: development of a numerical model. Comput Methods Biomech Biomed Engin 2024:1-9. [PMID: 38293739 DOI: 10.1080/10255842.2024.2310729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 01/19/2024] [Indexed: 02/01/2024]
Abstract
A predictive finite element model was developed to investigate the best configuration of a fixation pins system consisting of two K-wires inserted in a synthetic model (Sawbones®) at different angles and secured to a connecting rod. Two key parameters were considered to determine the best configuration delivering the higher pull-out strength and lower pull-out length: the diameter and insertion angle. Results show that as the diameter and insertion angle increased, the pull-out force increased, while the pull-out length decreased. Results are successfully compared with available experimental data in literature. This model can be used as an alternative to experimental study.
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Affiliation(s)
- Samuel Berthe
- ICube CNRS UMR7357, Strasbourg University, Strasbourg, France
- ICAM, Schiltigheim, France
| | - Nadia Bahlouli
- ICube CNRS UMR7357, Strasbourg University, Strasbourg, France
| | - Massamaesso Bilasse
- ICube CNRS UMR7357, Strasbourg University, Strasbourg, France
- ICAM, Schiltigheim, France
| | - Philippe Liverneaux
- ICube CNRS UMR7357, Strasbourg University, Strasbourg, France
- Department of Hand Surgery, Strasbourg University Hospitals, FMTS, Strasbourg, France
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Ruffenach L, Heintz D, Villette C, Cosentino C, Funfschilling D, Bodin F, Bahlouli N, Chatelin S. Ultrasonic elastography for the prevention of breast implant rupture: Detection of an increase with stiffness over implantation time. J Biomech 2024; 163:111955. [PMID: 38266533 DOI: 10.1016/j.jbiomech.2024.111955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 01/26/2024]
Abstract
Breast implants are widely used after breast cancer resection and must be changed regularly to avoid a rupture. To date, there are no quantitative criteria to help this decision. The mechanical evolution of the gels and membranes of the implants is still underinvestigated, although it can lead to early rupture. In this study, 35 breast explants having been implanted in patients for up to 17 years were characterized by ex vivo measurements of their mechanical properties. Using Acoustic Radiation Force Impulse (ARFI) ultrasound elastography, an imaging method for non-destructive mechanical characterization, an increase in the stiffness of the explants has been observed. This increase was correlated with the implantation duration, primarily after 8 years of implantation. With an increase of the shear modulus of up to a factor of nearly 3, the loss of flexibility of the implants is likely to lead to a significant increase of their risk of rupture. A complementary analysis of the gel from the explants by mass spectrometry imaging (MSI) and liquid chromatography coupled to high resolution mass spectrometry (LC-HRMS) confirms the presence of metabolites of cholesterol originating from the breast tissues, which most likely crossed the membrane of the implants and most likely degrades the gel. By observing the consequences of the physical-chemical mechanisms at work within patients, this study shows that ultrasound elastography could be used in vivoas a quantitative indicator of the risk of breast implant rupture and help diagnose their replacement.
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Affiliation(s)
- Laetitia Ruffenach
- ICube, UMR 7357 CNRS, University of Strasbourg, Strasbourg, France; Service de chirurgie plastique esthétique et reconstructrice, Hautepierre hospital, CHRU Strasbourg, HUS, Strasbourg, France
| | - Dimitri Heintz
- Plant Imaging & Mass Spectrometry (PIMS), IBMP, UPR 2357 CNRS, University of Strasbourg, Strasbourg, France
| | - Claire Villette
- Plant Imaging & Mass Spectrometry (PIMS), IBMP, UPR 2357 CNRS, University of Strasbourg, Strasbourg, France
| | | | | | - Frédéric Bodin
- ICube, UMR 7357 CNRS, University of Strasbourg, Strasbourg, France; Service de chirurgie plastique esthétique et reconstructrice, Hautepierre hospital, CHRU Strasbourg, HUS, Strasbourg, France
| | - Nadia Bahlouli
- ICube, UMR 7357 CNRS, University of Strasbourg, Strasbourg, France
| | - Simon Chatelin
- ICube, UMR 7357 CNRS, University of Strasbourg, Strasbourg, France
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Mereb T, Favreau H, Ollivier M, Jmal H, Bonnomet F, Bahlouli N, Martz P, Ehlinger M. Experimental study of risk of medial hinge fracture during distal femoral varus osteotomy. Orthop Traumatol Surg Res 2022; 109:103527. [PMID: 36563962 DOI: 10.1016/j.otsr.2022.103527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 05/12/2022] [Accepted: 05/16/2022] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Lateral opening wedge distal femoral osteotomy (LOWDFO) is indicated for isolated lateral osteoarthritis in the valgus morphotype. Medial hinge fracture is a factor for poor prognosis. The present study had two aims: 1) to assess the impact of a temporary K-wire on hinge fracture risk; and 2) to assess the impact of LOWDFO opening speed. HYPOTHESIS The main study hypothesis was that a temporary hinge K-wire reduces hinge fracture risk. The second hypothesis was that faster opening speed increases fracture risk. MATERIAL AND METHOD Twenty femurs were produced by 3D printing from a CT database, reproducing LOWDFO anatomy. The ABS® polymer showed the same breaking-point behavior as human bone. Ten specimens were included in the "K-wire" group (KW+) and 10 in the "No K-wire" group (KW-). To determine high and low speed, a motion-capture glove was used by 2 operators, providing 3D modeling of the surgeon's hand. High speed was defined as 152mm/min and low speed as 38mm/min. The KW+ and KW- groups were subdivided into high- and low-speed subgroups (HS, LS) of 5 each. Compression tests were conducted using an Instron® mechanical test machine up to hinge fracture. The main endpoint was maximum breaking-point force (N); the secondary endpoints were maximum displacement (mm) and maximum speed (min) at breaking point. RESULTS The K-wire significantly increased maximum breaking-point force (LS, 143.08N vs. 93.71N, p<0.01; and HS, 186.98N vs. 95.22N, p<0.01), but not maximum displacement (LS, 26.17mm vs 24.11mm, p= 0.31; and HS 26.18mm vs. 23.66mm, p=0.14) or maximum time (LS, 27.07sec vs. 24.94sec, p=0.31; and HS, 5.24sec vs. 4.73sec, p=0.14). Speed did not affect maximum force (KW+, 143.08N vs. 186.98N, p= 0.06; and KW-, 93.71N vs. 95.22N, p=0.42) or maximum displacement (KW+, 26.17mm vs. 26.18mm, p=1; and KW-, 24.11mm vs. 23.66mm, p=0.69). Only maximum time was greater at low speed (KW+, 27.07sec vs. 5.24sec, p>0.01; and KW-, 24.94sec vs. 4.73sec, p<0.01), which is obvious for constant distance. DISCUSSION The first study hypothesis was confirmed, with significantly lower hinge fracture risk with the K-wire, independently of opening speed. The second hypothesis was not confirmed. The study was performed under strict experimental conditions, unprecedented to our knowledge in the literature. However, complementary clinical studies are needed to confirm the present findings. LEVEL OF EVIDENCE IV, experimental study.
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Affiliation(s)
- Thomas Mereb
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 Avenue Molière, 67098 Strasbourg cedex, France; Laboratoire ICube, CNRS UMR 7357, 2-4 Rue Boussingault, 67000 France
| | - Henri Favreau
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 Avenue Molière, 67098 Strasbourg cedex, France
| | - Matthieu Ollivier
- Département de Chirurgie Orthopédique et Traumatologie, Aix Marseille Université, APHM, CNRS, ISM, Hôpital Sainte-Marguerite, Institut de la Locomotion, Marseille, France
| | - Hamdi Jmal
- Laboratoire ICube, CNRS UMR 7357, 2-4 Rue Boussingault, 67000 France
| | - François Bonnomet
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 Avenue Molière, 67098 Strasbourg cedex, France
| | - Nadia Bahlouli
- Laboratoire ICube, CNRS UMR 7357, 2-4 Rue Boussingault, 67000 France
| | - Pierre Martz
- CHU Dijon, Service d'Orthopédie Traumatologie, 14 Rue Paul Gaffarel, 21000 Dijon, France; Unité INSERM UMR CAPS U1093. UFR STAPS, - BP 27877, Campus Universitaire, 21078 Dijon Cedex, France
| | - Matthieu Ehlinger
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 Avenue Molière, 67098 Strasbourg cedex, France; Laboratoire ICube, CNRS UMR 7357, 2-4 Rue Boussingault, 67000 France.
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Perruisseau-Carrier A, Marco Y, Azoti W, Jmal H, Liverneaux P, Bahlouli N. Caractérisation mécanique du plexus brachial en traction uniaxiale et compression radiale, et corrélation histomorphologique. Hand Surgery and Rehabilitation 2022. [DOI: 10.1016/j.hansur.2022.09.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Didier A, Favreau H, Ollivier M, Jmal H, Bonnomet F, Bahlouli N, Martz P, Ehlinger M. Experimental investigation of the risk of lateral cortex fracture during valgus tibial osteotomy. Orthop Traumatol Surg Res 2022; 108:103428. [PMID: 36202319 DOI: 10.1016/j.otsr.2022.103428] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 01/23/2022] [Accepted: 03/16/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND Valgus-producing medial opening-wedge proximal tibial osteotomies (V-MOW-PTO) are used to treat isolated medial-compartment knee osteoarthritis in patients with varus malalignment. A fracture of the lateral cortical hinge is a risk factor for poor outcomes. Implantation of a protective K-wire has been suggested to prevent this complication. The primary objective of this bench study was to assess the ability of a protective K-wire to prevent lateral cortical fractures. The secondary objective was to evaluate the influence of the opening speed on fracture risk during the osteotomy. HYPOTHESIS The primary hypothesis was that a protective K-wire decreased the risk of hinge fracture. The secondary hypothesis was that this risk was greater when the opening speed was high. MATERIALS AND METHODS We performed an experimental study of 20 simulated thermoplastic-polymer (ABS) tibias obtained by 3D printing to assess the effects of wedge-opening speed (high vs. low) and presence of a protective K-wire (yes vs. no). The opening rates were determined in a preliminary study of Sawbone® specimens opened using a distractor. The opening rate was measured using an accelerometer via a motion-capture glove. After assessing several high and low opening speeds, we selected 38mm/min and 152mm/min for the study. We divided the 20 ABS specimens into four groups of five each: high speed and K-wire, low speed and K-wire, high speed and no K-wire, and low speed and no K-wire. The force was applied using an Instron™ testing machine until construct failure. The primary outcome measure was the load at failure (N) and the secondary outcome measures were the displacement (mm) and maximum time to failure (s). RESULTS At both speeds, values were significantly higher with vs. without a K-wire for load to failure (low: 253.3N vs. 175.5N, p<0.01; high: 262.2N vs. 154.1N, p<0.01), displacement (low: 11.1mm vs. 8.7mm, p<0.01; high: 11mm vs. 8.9mm; p=0.012), and maximal time to failure (low: 11.4 s vs. 8.9 s; p=0.012; high: 2.2 s vs. 1.8 s; p=0.011). Thus, the osteotomy opening speed seemed to have no influence on the risk of lateral cortex fracture. DISCUSSION Our main hypothesis was confirmed but our secondary hypothesis was refuted: a protective K-wire significantly decreased the risk of hinge fracture, whereas the osteotomy opening speed had no influence. To our knowledge, this is the first published study assessing the potential influence of opening speed on risk of lateral cortex fracture. Our findings were obtained in the laboratory and should be evaluated in clinical practice. LEVEL OF EVIDENCE IV, experimental study.
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Affiliation(s)
- Alexandre Didier
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, hôpitaux universitaires de Strasbourg, 1, avenue Molière, 67098 Strasbourg cedex, France; Laboratoire ICube, CNRS UMR 7357, 2-4, rue Boussingault, 67000, France
| | - Henri Favreau
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, hôpitaux universitaires de Strasbourg, 1, avenue Molière, 67098 Strasbourg cedex, France
| | - Matthieu Ollivier
- CNRS, ISM, département de chirurgie orthopédique et traumatologie de chirurgie orthopédique, hôpital Sainte-Marguerite, Institut de la Locomotion, Aix-Marseille université, AP-HM, Marseille, France
| | - Hamdi Jmal
- Laboratoire ICube, CNRS UMR 7357, 2-4, rue Boussingault, 67000, France
| | - François Bonnomet
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, hôpitaux universitaires de Strasbourg, 1, avenue Molière, 67098 Strasbourg cedex, France
| | - Nadia Bahlouli
- Laboratoire ICube, CNRS UMR 7357, 2-4, rue Boussingault, 67000, France
| | - Pierre Martz
- Service d'orthopédie traumatologie, CHU Dijon, 14, rue Paul-Gaffarel, 21000 Dijon, France; Unité Inserm UMR CAPS U1093. UFR STAPS, Campus universitaire, BP 27877, 21078 Dijon cedex, France
| | - Matthieu Ehlinger
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, hôpitaux universitaires de Strasbourg, 1, avenue Molière, 67098 Strasbourg cedex, France; Laboratoire ICube, CNRS UMR 7357, 2-4, rue Boussingault, 67000, France.
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Elhassan L, El Amiri L, Braymand S, Bahlouli N, Facca S, Sapa MC, Liverneaux P. Pullout strength of connected pins in hand surgery: Effect of pin diameter and insertion angle. Orthop Traumatol Surg Res 2022; 108:103411. [PMID: 36126870 DOI: 10.1016/j.otsr.2022.103411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/03/2022] [Accepted: 07/18/2022] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The purpose of this study was to examine the effect of insertion angles on the pullout strength of connected pins using a synthetic model simulating a hand bone. MATERIAL AND METHODS The material consisted of Sawbones® (20 mm×20 mm × 60 mm), fixation pins secured to a connecting rod much like an external fixator, an electric drill (speed 1,290 rpm) and a tensile testing machine. The Sawbones® were drilled with different pin diameters (1.2 mm, 1.5 mm, and 1.8 mm) and insertion angles (100°, 110° and 120°). A vertical displacement of 1 mm/min was applied until the pins were extracted (maximum force). RESULTS The pullout strength increased with the insertion angle of the connected pins. It also increased with their diameter. Regardless of the pin diameter, the load-displacement curve during the pullout test had 4 sections (peak 1, ascending slope, peak 2, descending slope) that corresponded to the combined frictional force and contact force between the pins and Sawbones®. DISCUSSION Our study findings showed that, theoretically, for wrist or hand fractures treated with connected pins, the larger the diameter and insertion angle, the better the mechanical holding power of the pins. LEVEL OF EVIDENCE I, experimental study.
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Affiliation(s)
- Lagsaiar Elhassan
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - Laela El Amiri
- Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France
| | - Sandrine Braymand
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - Nadia Bahlouli
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - Sybille Facca
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France; Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France
| | - Marie Cécile Sapa
- Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France
| | - Philippe Liverneaux
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France; Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France.
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Tamiti L, Braymand S, Bahlouli N, Facca S, Sapa MC, Liverneaux P. K-wire pullout strength in hand surgery: Impact of diameter, threading length and drilling speed. Orthop Traumatol Surg Res 2022; 108:103248. [PMID: 35181514 DOI: 10.1016/j.otsr.2022.103248] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 08/23/2021] [Accepted: 09/03/2021] [Indexed: 02/03/2023]
Abstract
INTRODUCTION The aim of the present study was to assess the impact, combined and in interaction, of diameter, threading length and drilling speed on K-wire pullout strength in a synthetic model of a hand bone. MATERIAL AND METHODS The material comprised Sawbones® (20 ×20×50mm), K-wires (diameter 1.2mm, 1.5mm, 1.8mm; threading 0mm, 5mm, 10mm, 15mm), a universal chuck with T handle and a drill (speed 0, 320, 500, 830, 1,290rpm), and tensile testing machine and a digital decision aid. The Sawbones® were drilled, varying diameter, threading and speed. The Statistical Design of Experiments (SDOE) methodology enabled the number of trials to be reduced from 300 to 70. Tensile tests at 1mm/s was imposed on the K-wire up to pullout (pullout strength). RESULTS There was no interaction between threading length and diameter effects or between drilling speed and diameter effects, but a strong interaction between drilling speed and threading length effects. CONCLUSION Before using K-wires for internal fixation in wrist or hand fracture, the surgeon has to select their characteristics, optimal holding power being theoretically ensured by large diameter wires with long threading inserted by a high-speed drill. LEVEL OF EVIDENCE I, experimental study.
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Affiliation(s)
- Louisa Tamiti
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - Sandrine Braymand
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - Nadia Bahlouli
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - Sybille Facca
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France; Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France
| | - Marie Cécile Sapa
- Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France
| | - Philippe Liverneaux
- ICube CNRS UMR7357, Strasbourg University, 2-4, rue Boussingault, 67000 Strasbourg, France; Department of Hand Surgery, Strasbourg University Hospitals, FMTS, 1, avenue Molière, 67200 Strasbourg, France.
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Pierret M, Favreau H, Bonnomet F, Elizondo Moreno D, Bahlouli N, Martz P, Ehlinger M. Comparison of five methods for locked-plate fixation of complex diaphyseal fractures. Orthop Traumatol Surg Res 2022; 108:103400. [PMID: 36096378 DOI: 10.1016/j.otsr.2022.103400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 05/03/2022] [Accepted: 05/11/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND Peri-prosthetic fractures (PPFs) are steadily rising in number due to population ageing and increased performance of joint replacement procedures. Although PPFs without implant loosening are usually managed by internal fixation, no consensus exists regarding the optimal construct. The primary objective of this study was to compare five constructs, and the secondary objective was to compare sub-groups of mono-cortical screw constructs, with the goal of identifying the method most appropriate for diaphyseal fracture fixation when prosthetic material is present within the intra-medullary canal. HYPOTHESIS The primary hypothesis was that fixation using bi-cortical screws, i.e., the current reference standard, was superior over other fixation methods. The secondary hypothesis was that adding double cerclage to mono-cortical screw fixation provided the greatest mechanical strength. MATERIALS AND METHODS Synthetic osteoporotic bone was used to compare five methods for locking-screw fixation of a femoral diaphyseal plate. One method involved bi-cortical screws and four methods mono-cortical screws, with no cerclage wire, a single cerclage wire on either side positioned near or at a distance from the fracture, and two cerclage wires on both sides of the fracture. A complex fracture was simulated by creating a 2-cm diaphyseal gap. Load-to-failure was determined by applying compression loading along the anatomical axis of the femur. RESULTS Bi-cortical screw fixation provided greater mechanical strength than did three of the four mono-cortical screw constructs. The exception was the mono-cortical-screw and double-cerclage construct, for which no significant difference was found compared to bi-cortical screw fixation. Thus, mono-cortical screw fixation with double cerclage may be the best alternative when presence of an implant in the intra-medullary canal precludes bi-cortical screw fixation. CONCLUSION The findings from this study have clear implications for clinical practice. The study hypotheses were partly confirmed. The absence of a significant difference between the reference-standard bi-cortical screw fixation method and mono-cortical screw fixation with double cerclage, combined with the results regarding the secondary objective, suggest that mono-cortical screws plus double cerclage deserve preference in patients with an intra-medullary implant. Clinical studies are needed to assess the results of this bench study. LEVEL OF EVIDENCE IV, bench study.
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Affiliation(s)
- Marie Pierret
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67098 Strasbourg cedex, France; Laboratoire ICube, Université de Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France
| | - Henri Favreau
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67098 Strasbourg cedex, France
| | - François Bonnomet
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67098 Strasbourg cedex, France
| | - Daniel Elizondo Moreno
- Laboratoire ICube, Université de Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France; Plateforme IRIS/ICube, Université de Strasbourg- CNRS, 1 place de l'hôpital, 67000 Strasbourg, France
| | - Nadia Bahlouli
- Laboratoire ICube, Université de Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France
| | - Pierre Martz
- CHU Dijon, service d'orthopédie traumatologie, 14 rue Paul Gaffarel, 21000 Dijon, France; Unité INSERM UMR CAPS U1093. UFR STAPS, - BP 27877, Campus Universitaire, 21078 Dijon Cedex, France
| | - Matthieu Ehlinger
- Service de Chirurgie Orthopédique et de Traumatologie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67098 Strasbourg cedex, France; Laboratoire ICube, Université de Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France.
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Azoti W, Aghazade M, Ollivier M, Bahlouli N, Favreau H, Ehlinger M. Orientation and end zone of the osteotomy cut for high tibial osteotomy: Influence on the risk of lateral hinge fracture. A finite element analysis. Orthop Traumatol Surg Res 2021; 107:103031. [PMID: 34343697 DOI: 10.1016/j.otsr.2021.103031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 02/22/2021] [Accepted: 03/09/2021] [Indexed: 02/03/2023]
Abstract
INTRODUCTION the hinge plays a fundamental role in the support and consolidation of a high tibial osteotomy. The objective of this work was to analyse the influence of the end zone of the osteotomy cut and its orientation in relation to the articular joint line (JL) on the risk of hinge fracture. HYPOTHESIS a specific orientation and end zone of the osteotomy cut can be utilised to decrease the risk of hinge fracture. MATERIAL AND METHOD a finite element (FE) model was used to reproduce the proximal portion of the tibia and the proximal tibiofibular joint with transverse isotropic elastic bone properties. A 1.27mm thick, complete, anteroposterior saw cut was made with a U-shaped saw blade. Five proximal and lateral tibial zones were used according to Nakamura et al corresponding to the end zones of the osteotomy cut. Three angulations of the cut relative to the JL were defined: 10°, 15°, 20°. The tests consisted of simulating 15 possible situations (3 angulations for each of the 5 end zones) on this model. These simulations made it possible to identify the existence of a local stress concentration (von Mises, in MPa) at the level of the hinge, corresponding to the main judgment criterion. RESULTS If we consider only the end zones of the osteotomy cut, regardless of its angulation with respect to the JL, the zone which presents, on average, the lowest local stress concentration is the AM zone (40.3MPa). If we consider only the angulation of the osteotomy cut, with respect to the JL, regardless of the end zone of the cut, the angulation that locally concentrates, on average, the least stress is an angulation at 10° (147.7MPa). Finally, it is important to define the best end zone of the osteotomy cut for each angulation value in relation to the JL: for an angulation of 10°, the end zone must be in AM (38MPa), but also for an angulation of 15° (45MPa), and for an angulation of 20° (38MPa). DISCUSSION-CONCLUSION With the inherent caveats of the experimental conditions, the hypothesis is confirmed. An end zone of the osteotomy cut exists (AM) and an orientation (10°) that induces the lowest local stress concentration and therefore the least likely to induce lateral hinge fracture. However, the orientation of the osteotomy cut is also a matter of surgical habit, especially regarding complementary osteotomy of the tibial tuberosity that some may want to avoid. Thus, it is equally important to know the best end zone associated with a given angulation of the cut in relation to the JL, which according to these results is the AM zone for each angulation. This information helps guide the operator in their surgical practices according to their habits. LEVEL OF EVIDENCE V, expert opinion.
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Affiliation(s)
- Wiyao Azoti
- Laboratoire ICube, équipe MMB, 67400 Illkirch, France
| | | | - Matthieu Ollivier
- Département de chirurgie orthopédique, hôpital Sainte-Marguerite, hôpital Universitaire de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France
| | | | - Henri Favreau
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, 1, avenue Molière, 67098 Strasbourg cedex, France
| | - Matthieu Ehlinger
- Laboratoire ICube, équipe MMB, 67400 Illkirch, France; Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, 1, avenue Molière, 67098 Strasbourg cedex, France.
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Kharouf N, Mancino D, Zghal J, Helle S, Jmal H, Lenertz M, Viart N, Bahlouli N, Meyer F, Haikel Y, Ball V. Dual role of tannic acid and pyrogallol incorporated in plaster of Paris: Morphology modification and release for antimicrobial properties. Mater Sci Eng C Mater Biol Appl 2021; 127:112209. [PMID: 34225861 DOI: 10.1016/j.msec.2021.112209] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 05/01/2021] [Accepted: 05/22/2021] [Indexed: 12/17/2022]
Abstract
The design of bioactive plasters is of major interest for the amelioration of dental and bone cements. In this article, a one pot and environmentally friendly strategy based on the addition of a cheap polyphenol-tannic acid (TA) or the main phenolic constituent of TA, namely pyrogallol (PY)- able to interact with calcium sulfate is proposed. Tannic acid and pyrogallol not only modify the morphology of the obtained plaster+TA/PY composites but a part of it is released and provides strong-up to twenty fold- antibacterial effect against Staphylococcus aureus. It is shown that the higher antibacterial efficiency of PY is related to a greater release compared to TA even if in solution the antibacterial effect of PY is lower than that of TA when reported on the basis of the molar concentration in PY units.
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Affiliation(s)
- Naji Kharouf
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Davide Mancino
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Jihed Zghal
- ICube Laboratory, UMR 7357 CNRS, Mechanics Department, University of Strasbourg, 6700 Strasbourg, France; Laboratoire Energetique Mecanique Electromagnetisme, University of Paris Ouest, 50 rue de Sèvres, 92410 Ville d'Avray, France
| | - Sophie Helle
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Hamdi Jmal
- ICube Laboratory, UMR 7357 CNRS, Mechanics Department, University of Strasbourg, 6700 Strasbourg, France
| | - Marc Lenertz
- Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS, Université de Strasbourg, 23 rue du Lœss, F-67034 Strasbourg, France
| | - Nathalie Viart
- Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS, Université de Strasbourg, 23 rue du Lœss, F-67034 Strasbourg, France
| | - Nadia Bahlouli
- ICube Laboratory, UMR 7357 CNRS, Mechanics Department, University of Strasbourg, 6700 Strasbourg, France
| | - Florent Meyer
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Youssef Haikel
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Vincent Ball
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France.
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11
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Kharouf N, Zghal J, Addiego F, Gabelout M, Jmal H, Haikel Y, Bahlouli N, Ball V. Tannic acid speeds up the setting of mineral trioxide aggregate cements and improves its surface and bulk properties. J Colloid Interface Sci 2021; 589:318-326. [PMID: 33472151 DOI: 10.1016/j.jcis.2020.12.115] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/01/2020] [Accepted: 12/29/2020] [Indexed: 12/18/2022]
Abstract
HYPOTHESIS The setting time and mechanical properties of cements are a major technical concern for a long time in civil engineering. More recently those practical problems became a major concern for biomedical applications -in bone surgery and in dentistry- in particular concerning the setting time which should be minimized. The possibility to add organic additives to interact with the different constituting ions in cements constitutes a way to modify the setting kinetics. We made the assumption that a hydrolysable polyphenol like tannic acid could modify the setting time and the physical properties of Mineral Trioxide Aggregate (MTA). EXPERIMENTS Tannic acid is added in variable proportions to the water used to set MTA. The formation of the hybrid organic-mineral cements is investigated using a combination of structural, chemical and mechanical methods. X-ray tomography was also used to investigate the changes in porosity and pore size distribution upon incorporation of tannic acid in MTA based cements. The hydrophilicity of the cements was evaluated by measuring the permeation kinetics of small water droplets. FINDINGS We found that tannic acid allowed to reduce markedly the setting time of MTA based cements. The obtained cements have an increased hydrophilicity and display excellent resistance to compression. The number of pores but not the average pore size is also affected. The possible roles of tannic acid in modifying the cement properties are discussed.
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Affiliation(s)
- Naji Kharouf
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Jihed Zghal
- ICube Laboratory, University of Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France; ECAM Strasbourg Europe, 2 Rue de Madrid, 67300 Schiltigheim, France
| | - Frédéric Addiego
- Luxembourg Institute of Science and Technology (LIST), Department Materials Research and Technology (MRT), ZAE Robert Steichen, 5 Rue Bommel, L-4940 Hautcharage, Luxembourg
| | - Manon Gabelout
- R&D/Innovation, ITENA CLINICAL, 31 Avenue Georges Clemenceau, 93420 Villepinte, France
| | - Hamdi Jmal
- ICube Laboratory, University of Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France
| | - Youssef Haikel
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Nadia Bahlouli
- ICube Laboratory, University of Strasbourg- CNRS, 2 rue Boussingault, 67000 Strasbourg, France
| | - Vincent Ball
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 8 rue Sainte Elisabeth, 67000 Strasbourg, France; Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France.
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Colak OU, Uzunsoy D, Bahlouli N, Francart C. Experimental investigation of oligo cyclic compression behavior of pure epoxy and graphene-epoxy nanocomposites. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03453-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tamiti L, Braymand S, Bahlouli N, Jmal H, Facca S. Pullout strength of K-wires: optimal solutions analysis. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1811498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- L. Tamiti
- ICube laboratory, University of Strasbourg/CNRS, Strasbourg, France
| | - S. Braymand
- ICube laboratory, University of Strasbourg/CNRS, Strasbourg, France
| | - N. Bahlouli
- ICube laboratory, University of Strasbourg/CNRS, Strasbourg, France
| | - H. Jmal
- ICube laboratory, University of Strasbourg/CNRS, Strasbourg, France
| | - S. Facca
- ICube laboratory, University of Strasbourg/CNRS, Strasbourg, France
- SOS main, hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, Illkirch, France
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Jacquet C, Marret A, Myon R, Ehlinger M, Bahlouli N, Wilson A, Kley K, Rossi JM, Parratte S, Ollivier M. Adding a protective screw improves hinge's axial and torsional stability in High Tibial Osteotomy. Clin Biomech (Bristol, Avon) 2020; 74:96-102. [PMID: 32151903 DOI: 10.1016/j.clinbiomech.2020.02.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 02/25/2020] [Accepted: 02/27/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUNDS Despite the use of a locking plate a 30% incidence of lateral hinge fracture after Open-Wedge High Tibial Ostetomy was described in the literature. A finite element model was used to analyze if the presence of a hinge-securing screw in the osteotomy area, using Patient Specific Cutting Guides with a locking plate, decreases the stresses within the lateral hinge during compression and torsion. METHODS A 3D model of a tibial sawbone was used to simulate an opening wedge of 10°. To apply loads on the tibial plateau, two supports were modelled on each tibial plateau to simulate the femoral condyles forces. A two second model with a hinge-stabilizing was defined with two different screws (diameter 2 mm and 4 mm). Two cases of static charges were considered 1) compression test (2500 N) 2) Torsion test (along the tibial mechanical axis). FINDINGS During compression simulation, 17% of the total surface of lateral hinge was stressed between 41-50Mpa without hinge-securing screw while the amount of surface under stress between 41 and 50 MPa dropped significantly under screw stabilization (1% for the 2 mm and 3% for the 4 mm). During torsion stress simulation a decrease of the value of the maximal stress in the lateral hinge was also observed with the addition of a hinge-securing screw (37 MPa without screw, 27Mpa with a 2 mm screw and 25 Mpa with a 4 mm screw). INTERPRETATION Positioning a screw intersecting the cutting plane at the theoretical lateral hinge location associated with a locking plate reduces lateral hinge stress in both compression and torsion. Those findings need to be confirmed by further specimens' mechanical testing.
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Affiliation(s)
- Christophe Jacquet
- Institute of Movement and locomotion Department of Orthopedics and Traumatology, St Marguerite Hospital, 270 Boulevard Sainte Marguerite, BP 29 13274 Marseille, France; Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France
| | - Auriane Marret
- Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France
| | - Robin Myon
- Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France
| | - Matthieu Ehlinger
- Service de Chirurgie Orthopédique et de Traumatologie, CHU Hautepierre, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 Avenue Molière, 67098 Strasbourg Cedex, France
| | - Nadia Bahlouli
- Laboratoire ICube, IUT de Haguenau 2 rue Boussingault, FR-67000 Strasbourg, France
| | - Adrian Wilson
- Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France
| | - Kristian Kley
- Institute of Movement and locomotion Department of Orthopedics and Traumatology, St Marguerite Hospital, 270 Boulevard Sainte Marguerite, BP 29 13274 Marseille, France
| | - Jean-Marie Rossi
- Institute of Movement and locomotion Department of Orthopedics and Traumatology, St Marguerite Hospital, 270 Boulevard Sainte Marguerite, BP 29 13274 Marseille, France; Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France; Centrale Marseille, 13451 Marseille Cedex 20, France
| | - Sebastien Parratte
- Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France
| | - Matthieu Ollivier
- Institute of Movement and locomotion Department of Orthopedics and Traumatology, St Marguerite Hospital, 270 Boulevard Sainte Marguerite, BP 29 13274 Marseille, France; Aix Marseille Univ, APHM, CNRS, ISM, Sainte-Marguerite Hospital, Institute for Locomotion, Department of Orthopedics and Traumatology, Marseille, France.
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Kharouf N, Cebula H, Cifti S, Talon I, Séverac F, Bahlouli N, Facca S. Benefits of using the "Micro-Clock" to evaluate the acquisition and maintenance of microsurgery skills. Hand Surg Rehabil 2019; 38:353-357. [PMID: 31589934 DOI: 10.1016/j.hansur.2019.09.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 09/25/2019] [Accepted: 09/30/2019] [Indexed: 10/25/2022]
Abstract
This study was done using an educational tool called the "Micro-Clock", which was inspired by Chan's "round-the-clock" training model. The Micro-Clock consisted of a surgical sponge on which 12 sewing needles were configured in the shape of a clock. The subjects were asked to thread a small suture through the eyelets as quickly as possible. Steadiness and instrument manipulation were evaluated during each trial and graded from 1 to 3. The execution time was measured in seconds. Fifteen instructors did the Micro-Clock test once in order to validate this tool's ability to assess the skills of qualified microsurgeons. Next, nine students, who were enrolled in a microsurgery diploma program, did the test nine times during the program to measure their progression and to evaluate their mastery and execution speed. There was no significant differences among the three instructor sub-groups (residents, assistants and senior surgeons) in their steadiness, instrument manipulation and execution time. When the students performed the Micro-Clock test, there was a significant improvement in movement fluidity as well as the execution time between the first and ninth test. Nevertheless, the execution time did not improve further after the fourth test. The Micro-Clock is a useful and reliable tool for teaching microsurgery skills and testing the maintenance of skills in qualified microsurgeons.
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Affiliation(s)
- N Kharouf
- Inserm UMR 1121, Université de Strasbourg, 11, rue Humann, 67000 Strasbourg, France; Faculté de Chirurgie Dentaire, Université de Strasbourg, 8, rue Sainte-Elisabeth, 67000 Strasbourg, France
| | - H Cebula
- Service de Neurochirurgie, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67200 Strasbourg, France
| | - S Cifti
- Inserm UMR 1121, Université de Strasbourg, 11, rue Humann, 67000 Strasbourg, France; Service de Chirurgie ORL, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67200 Strasbourg, France
| | - I Talon
- Inserm UMR 1121, Université de Strasbourg, 11, rue Humann, 67000 Strasbourg, France; Service de Chirurgie Infantile Viscérale, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67200 Strasbourg, France
| | - F Séverac
- Laboratoire de Biostatistique et Informatique Médicale, ICube UMR 7357, Hôpitaux Universitaires de Strasbourg, 67091 Strasbourg cedex, France
| | - N Bahlouli
- ICube, Université de Strasbourg, CNRS, Département de Mécanique, équipe MMB, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - S Facca
- ICube, Université de Strasbourg, CNRS, Département de Mécanique, équipe MMB, 2-4, rue Boussingault, 67000 Strasbourg, France; Service de chirurgie de la Main, SOS main, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67200 Strasbourg, France.
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Ehlinger M, Ollivier M, Course S, Guerin A, Lantz É, Zahraa D, Bonnomet F, Bahlouli N. Effect of saw blade geometry on crack initiation and propagation on the lateral cortical hinge for HTO: Finite element analysis. Orthop Traumatol Surg Res 2019; 105:1079-1083. [PMID: 31447398 DOI: 10.1016/j.otsr.2019.04.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 01/23/2019] [Accepted: 04/16/2019] [Indexed: 02/02/2023]
Abstract
INTRODUCTION The hinge plays a primary role in the hold and healing of a high tibial osteotomy (HTO). Weakening of the hinge is a risk factor for failure. The aim of our study was to determine whether the geometry of the saw blade's cutting edge impacts crack initiation or propagation on the hinge. HYPOTHESIS A certain cutting edge geometry exists that will reduce this risk. MATERIALS AND METHODS A finite element model with transverse isotropic elastic bone properties was created. A 1.27-mm thick saw cut (full thickness in anteroposterior direction) was made leaving a 1cm lateral cortical hinge. Three different cutting edge geometries were compared: rectangular, U-shaped, V-shaped. Opening of the osteotomy was done over 1mm for 1 s by a load applied distally with the proximal portion fixed. In the first simulation, no crack was initiated at the hinge, while in the second simulation, the beginnings of a 2mm crack angled upward at 15° was added. These two simulations were used to identify whether a local stress riser was present at the hinge. This information was used to calculate the energy release rate to the hinge, which corresponds to the energy needed to initiate and propagate a crack on the hinge. RESULTS In the first simulation (no crack initiation), a rectangular saw blade geometry resulted in the lowest local stress concentration. In the second simulation (with crack initiation), the U-shaped geometry resulted in the lowest local stress concentration. The U-shaped geometry had the lowest energy release rate, meaning that it was the least likely to initiate and propagate a crack on the lateral cortical hinge. DISCUSSION/CONCLUSION Keeping the inherent limitations related to computer modelling in mind, our findings show that a U-shaped cutting edge is least likely to initiate or propagate a crack since it has the lowest energy release rate. This confirms our hypothesis. LEVEL OF EVIDENCE V, expert opinion.
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Affiliation(s)
- Matthieu Ehlinger
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, CHU de Strasbourg, 1, avenue Molière, 67098 Strasbourg, France; Laboratoire ICube, équipe MMB, 67400 Illkirch, France.
| | - Matthieu Ollivier
- Département de chirurgie orthopédique, hôpital Sainte-Marguerite, hôpital universitaire de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France
| | | | - Arnaud Guerin
- Laboratoire ICube, équipe MMB, 67400 Illkirch, France
| | - Éric Lantz
- Laboratoire ICube, équipe MMB, 67400 Illkirch, France
| | - Dany Zahraa
- Laboratoire ICube, équipe MMB, 67400 Illkirch, France
| | - François Bonnomet
- Service de chirurgie orthopédique et de traumatologie, hôpital de Hautepierre, CHU de Strasbourg, 1, avenue Molière, 67098 Strasbourg, France
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Ehlinger M, Soenen M, Bahlouli N, Bonnevialle P. Interprosthetic femoral fracture: Crime or punishment? Orthop Traumatol Surg Res 2019; 105:577-578. [PMID: 30885817 DOI: 10.1016/j.otsr.2019.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 03/02/2019] [Indexed: 02/02/2023]
Affiliation(s)
- Matthieu Ehlinger
- Pôle Locomax, service de chirurgie orthopédique et de traumatologie du membre inférieur, hôpital de Hautepierre II, hôpitaux universitaires de Strasbourg, 1, avenue Molière, 67098 Strasbourg cedex, France; Équipe MMB, laboratoire ICube, 300, boulevard Sébastien-Brant, 67400 Illkirch, France.
| | - Marc Soenen
- Polyclinique du Parc, avenue des Sables, 49300 Cholet, France
| | - Nadia Bahlouli
- Équipe MMB, laboratoire ICube, 300, boulevard Sébastien-Brant, 67400 Illkirch, France
| | - Paul Bonnevialle
- Département universitaire d'orthopédie traumatologie, hôpital PP Riquet, place Baylac, 31052 Toulouse cedex, France
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Jmal H, Bahlouli N, Wagner-Kocher C, Leray D, Ruch F, Munsch JN, Nardin M. Influence of the grade on the variability of the mechanical properties of polypropylene waste. Waste Manag 2018; 75:160-173. [PMID: 29463419 DOI: 10.1016/j.wasman.2018.02.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/12/2018] [Accepted: 02/03/2018] [Indexed: 06/08/2023]
Abstract
The prior properties of recycled polypropylene depend on the origin of waste deposits and its chemical constituents. To obtain specific properties with a predefine melt flow index of polypropylene, the suppliers of polymer introduce additives and fillers. However, the addition of additives and/or fillers can modify strongly the mechanical behaviour of recycled polypropylene. To understand the impact of the additives and fillers on the quasi-static mechanical behaviour, we consider, in this study, three different recycled polypropylenes with three different melt flow index obtained from different waste deposits. The chemical constituents of the additives and filler contents of the recycled polypropylenes are determined through thermo-physico-chemical analysis. Tensile and bending tests performed at different strain rates allow identifying the mechanical properties such as the elastic modulus, the yield stress, the maximum stress, and the failure mechanisms. The results obtained are compared with non-recycled polypropylene and with few researches to explain the combined effect of additives. Finally, a post-mortem analysis of the samples was carried out to make the link between the obtained mechanical properties and microstructure.
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Affiliation(s)
- Hamdi Jmal
- ICube, Université de Strasbourg, CNRS, 2-4 rue Boussingault, 67000 Strasbourg, France.
| | - Nadia Bahlouli
- ICube, Université de Strasbourg, CNRS, 2-4 rue Boussingault, 67000 Strasbourg, France.
| | - Christiane Wagner-Kocher
- LPMT - ENSISA, Université de Haute Alsace, Mulhouse, 11 rue Alfred Werner, 68093 Mulhouse, France; LMGC, Univ. Montpellier, CNRS, Montpellier, France.
| | - Dimitri Leray
- Cetim-Cermat, 21 Rue de Chemnitz, 68200 Mulhouse, France.
| | - Frédéric Ruch
- Cetim-Cermat, 21 Rue de Chemnitz, 68200 Mulhouse, France.
| | - Jean-Nicolas Munsch
- Institut de Science des Matériaux de Mulhouse (IS2M), UMR 7361, 15 Jean Starcky, 68057 Mulhouse, France.
| | - Michel Nardin
- Institut de Science des Matériaux de Mulhouse (IS2M), UMR 7361, 15 Jean Starcky, 68057 Mulhouse, France.
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Hidalgo Díaz JJ, Muresan L, Touchal S, Bahlouli N, Liverneaux P, Facca S. The new digit tourniquet ForgetMeNot ®. Orthop Traumatol Surg Res 2018; 104:133-136. [PMID: 29233761 DOI: 10.1016/j.otsr.2017.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 10/02/2017] [Accepted: 10/10/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND Digit tourniquets are widely used in the operating room and even more often in the emergency department to allow the exploration of injuries. A rolled surgical glove finger or silicone catheter placed at the base of the digit is a common method. However, rolled glove tourniquets are easily forgotten under the dressing and may then cause ischemia, which may require amputation. Silicone catheters are expensive single-use devices that may fail to provide effective exsanguination and must be removed by cutting, which may result in skin lesions. The ForgetMeNot® digit tourniquet (Arex, Palaiseau, France) was designed to overcome these drawbacks. The objective of this study was to assess the use of ForgetMeNot® in our clinical practice. HYPOTHESIS The ForgetMeNot® digit tourniquet is easy to position and remove, effective, and difficult to accidentally leave in place. MATERIAL AND METHODS ForgetMeNot® is composed of two solid cylindrical silicone strands emerging from a central crosspiece bearing two holes through which the ends of the strands can be threaded until stopped by beads on each strand. The device can be sterilised and re-used. It is easy to put in place and to remove. Threading the ends through the holes in the crosspiece forms two loops, which are passed around the tip of the finger. The device is then rolled down to the base of the digit, wrapping around itself and thus tightening gradually. At the end of the surgical procedure, pulling on the flat central crosspiece releases the device. ForgetMeNot® was tested by junior and senior surgeons in 86 patients. The following were assessed: pain, tourniquet time, effectiveness of exsanguination, complications, and the learning curve. RESULTS Positioning the device caused no pain. No patient reported paraesthesia. Remembering to remove the device was made easy by its bright blue or yellow colour. The pressure applied ensured effective exsanguination of the digit. In no case was cutting the device required for removal. Each device was sterilised and re-used several times. DISCUSSION The new digit tourniquet ForgetMeNot® is unlikely to be forgotten, effective, easy to use, re-usable, and associated with a low risk of skin lesions upon removal. LEVEL OF EVIDENCE III, retrospective uncontrolled study.
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Affiliation(s)
- J J Hidalgo Díaz
- CCOM, FMTS, service de chirurgie de la main, hôpitaux universitaires de Strasbourg, 10, avenue Baumann, 67400 Illkirch, France; UMR 7357, CNRS, équipe MMB, laboratoire Icube, université de Strasbourg, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - L Muresan
- CCOM, FMTS, service de chirurgie de la main, hôpitaux universitaires de Strasbourg, 10, avenue Baumann, 67400 Illkirch, France
| | - S Touchal
- UMR 7357, CNRS, équipe MMB, laboratoire Icube, université de Strasbourg, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - N Bahlouli
- UMR 7357, CNRS, équipe MMB, laboratoire Icube, université de Strasbourg, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - P Liverneaux
- CCOM, FMTS, service de chirurgie de la main, hôpitaux universitaires de Strasbourg, 10, avenue Baumann, 67400 Illkirch, France; UMR 7357, CNRS, équipe MMB, laboratoire Icube, université de Strasbourg, 2-4, rue Boussingault, 67000 Strasbourg, France
| | - S Facca
- CCOM, FMTS, service de chirurgie de la main, hôpitaux universitaires de Strasbourg, 10, avenue Baumann, 67400 Illkirch, France; UMR 7357, CNRS, équipe MMB, laboratoire Icube, université de Strasbourg, 2-4, rue Boussingault, 67000 Strasbourg, France.
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Salazar Botero S, Elizondo Moreno JD, Séverac F, Bahlouli N, Jmal H, Liverneaux PA, Facca S. Mechanical characterization of digital collateral nerves: a cadaver study. Comput Methods Biomech Biomed Engin 2017; 20:183-184. [PMID: 29088590 DOI: 10.1080/10255842.2017.1382923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- S Salazar Botero
- a Department of Hand Surgery, SOS main, CCOM , University Hospital of Strasbourg , Illkirch , France.,b Laboratory ICube, CNRS, UMR 7357 , University of Strasbourg , Strasbourg , France
| | - J D Elizondo Moreno
- b Laboratory ICube, CNRS, UMR 7357 , University of Strasbourg , Strasbourg , France
| | - F Séverac
- c Department of Public health , University Hospital of Strasbourg , Strasbourg , France
| | - N Bahlouli
- b Laboratory ICube, CNRS, UMR 7357 , University of Strasbourg , Strasbourg , France
| | - H Jmal
- b Laboratory ICube, CNRS, UMR 7357 , University of Strasbourg , Strasbourg , France
| | - P A Liverneaux
- a Department of Hand Surgery, SOS main, CCOM , University Hospital of Strasbourg , Illkirch , France.,b Laboratory ICube, CNRS, UMR 7357 , University of Strasbourg , Strasbourg , France
| | - S Facca
- a Department of Hand Surgery, SOS main, CCOM , University Hospital of Strasbourg , Illkirch , France.,b Laboratory ICube, CNRS, UMR 7357 , University of Strasbourg , Strasbourg , France
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Perruisseau-Carrier A, Bahlouli N, Bierry G, Vernet P, Facca S, Liverneaux P. Comparison between isotropic linear-elastic law and isotropic hyperelastic law in the finite element modeling of the brachial plexus. ANN CHIR PLAST ESTH 2017; 62:664-668. [PMID: 28385568 DOI: 10.1016/j.anplas.2017.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/02/2017] [Indexed: 12/17/2022]
Abstract
Augmented reality could help the identification of nerve structures in brachial plexus surgery. The goal of this study was to determine which law of mechanical behavior was more adapted by comparing the results of Hooke's isotropic linear elastic law to those of Ogden's isotropic hyperelastic law, applied to a biomechanical model of the brachial plexus. A model of finite elements was created using the ABAQUS® from a 3D model of the brachial plexus acquired by segmentation and meshing of MRI images at 0°, 45° and 135° of shoulder abduction of a healthy subject. The offset between the reconstructed model and the deformed model was evaluated quantitatively by the Hausdorff distance and qualitatively by the identification of 3 anatomical landmarks. In every case the Hausdorff distance was shorter with Ogden's law compared to Hooke's law. On a qualitative aspect, the model deformed by Ogden's law followed the concavity of the reconstructed model whereas the model deformed by Hooke's law remained convex. In conclusion, the results of this study demonstrate that the behavior of Ogden's isotropic hyperelastic mechanical model was more adapted to the modeling of the deformations of the brachial plexus.
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Affiliation(s)
- A Perruisseau-Carrier
- Department of hand surgery, SOS main, CCOM, university of Strasbourg, Icube CNRS 7357, university hospital of Strasbourg, FMTS, 10, avenue Baumann, 67403 Illkirch cedex, France
| | - N Bahlouli
- Department of mechanics, university of Strasbourg/CNRS, ICUBE, 2, rue Boussingault, 67000 Strasbourg, France
| | - G Bierry
- Guillaume Bierry, radiology department, university of Strasbourg, FMTS, 1, place de l'Hôpital, 67000 Strasbourg, France
| | - P Vernet
- Department of hand surgery, SOS main, CCOM, university of Strasbourg, Icube CNRS 7357, university hospital of Strasbourg, FMTS, 10, avenue Baumann, 67403 Illkirch cedex, France
| | - S Facca
- Department of hand surgery, SOS main, CCOM, university of Strasbourg, Icube CNRS 7357, university hospital of Strasbourg, FMTS, 10, avenue Baumann, 67403 Illkirch cedex, France
| | - P Liverneaux
- Department of hand surgery, SOS main, CCOM, university of Strasbourg, Icube CNRS 7357, university hospital of Strasbourg, FMTS, 10, avenue Baumann, 67403 Illkirch cedex, France.
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Perruisseau-Carrier A, Bahlouli N, Po C, Vernet P, Facca S, Liverneaux P. Analysis of the modifications of MRI signal of the brachial plexus of rats: Comparative study before and after freezing/thawing. ANN CHIR PLAST ESTH 2017; 62:322-326. [PMID: 28129915 DOI: 10.1016/j.anplas.2016.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 12/27/2016] [Indexed: 10/20/2022]
Abstract
The aim of this study was to compare the MRI signal of the brachial plexus and surrounding muscles before and after freezing/thawing on a murine model. A first MRI going through the brachial plexuses of 5 healthy Wistar rats was performed immediately post-mortem. A second MRI was performed after freezing at -30°C and then thawing at 20°C for 24hours. All MRI images were segmented to make nerve and muscular structures appear and calculate the average intensity of the MRI signal using the program ImageJ. The average nerve and muscular MRI signals were compared before and after freezing/thawing and rated in grayscale units between 0 and 255. The average intensity of the MRI signal of nerve structures was 40.315 grayscale units before freezing and 31.943 after freezing/thawing. The average intensity of the MRI signal of muscular structures was 25.44 grayscale units before freezing and 35.710 after freezing/thawing. Our results have shown that the intensity of the MRI signal of the brachial plexus was higher before freezing/thawing. The intensity of the MRI signal of muscles was lower than the intensity of the brachial plexus before freezing/thawing and higher after freezing/thawing in muscles than in brachial plexus. The MRI could be used in clinical practice to monitor the reinnervation after frozen nerve allografts.
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Affiliation(s)
- A Perruisseau-Carrier
- Department of hand surgery, SOS main, Icube CNRS 7357, CCOM, university hospital of Strasbourg, FMTS, university of Strasbourg, 10, avenue Baumann, 67400 Illkirch cedex, France
| | - N Bahlouli
- Department of mechanics, CNRS, ICUBE, university of Strasbourg, 2, rue Boussingault, 67000 Strasbourg, France
| | - C Po
- Department of mechanics, CNRS, ICUBE, university of Strasbourg, 2, rue Boussingault, 67000 Strasbourg, France
| | - P Vernet
- Department of hand surgery, SOS main, Icube CNRS 7357, CCOM, university hospital of Strasbourg, FMTS, university of Strasbourg, 10, avenue Baumann, 67400 Illkirch cedex, France
| | - S Facca
- Department of hand surgery, SOS main, Icube CNRS 7357, CCOM, university hospital of Strasbourg, FMTS, university of Strasbourg, 10, avenue Baumann, 67400 Illkirch cedex, France
| | - P Liverneaux
- Department of hand surgery, SOS main, Icube CNRS 7357, CCOM, university hospital of Strasbourg, FMTS, university of Strasbourg, 10, avenue Baumann, 67400 Illkirch cedex, France.
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Boumbimba RM, Wang K, Hablot E, Bahlouli N, Ahzi S, Avérous L. Renewable biocomposites based on cellulose fibers and dimer fatty acid polyamide: Experiments and modeling of the stress-strain behavior. POLYM ENG SCI 2016. [DOI: 10.1002/pen.24390] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- R. Matadi Boumbimba
- Laboratory of Mechanics, Biomechanics, Polymers and Structures, National Engineering School of Metz, Lorraine University; 1 Route D'Ars Laquenexy cs6582 Metz Cedex 3 57078 France
| | - K. Wang
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU); Qatar Foundation, PO Box 5825 Doha Qatar
| | - E. Hablot
- BioTeam/ICPEES-ECPM, UMR 7515, Université De Strasbourg; 25 Rue Becquerel, 67087 Strasbourg Cedex 2 France
- Department of Chemical Engineering and Material Science; Michigan State University; East Lansing Michigan 48910
| | - N. Bahlouli
- ICube Laboratory; University of Strasbourg/CNRS; 2 Rue Boussingault Strasbourg 67000 France
| | - S. Ahzi
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU); Qatar Foundation, PO Box 5825 Doha Qatar
| | - L. Avérous
- BioTeam/ICPEES-ECPM, UMR 7515, Université De Strasbourg; 25 Rue Becquerel, 67087 Strasbourg Cedex 2 France
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Bernard C, Bahlouli N, Wagner-Kocher C, Ahzi S, Rémond Y. Impact behaviour of an innovative plasticized poly(vinyl chloride) for the automotive industry. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159402013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bernard C, Correia J, Bahlouli N, Ahzi S. Numerical simulation of large deformations of amorphous polymer with finite element method: Application to normal impact test. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159404043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wanko A, Laurent J, Bois P, Mosé R, Wagner-Kocher C, Bahlouli N, Tiffay S, Braun B, Provo kluit PW. Assessment of rock wool as support material for on-site sanitation: hydrodynamic and mechanical characterization. Environ Technol 2015; 37:369-380. [PMID: 26165374 DOI: 10.1080/09593330.2015.1069901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 06/27/2015] [Indexed: 06/04/2023]
Abstract
This study proposes mechanical and hydrodynamic characterization of rock wool used as support material in compact filter. A double-pronged approach, based on experimental simulation of various physical states of this material was done. First of all a scanning electron microscopy observation allows to highlight the fibrous network structure, the fibres sizing distribution and the atomic absorption spectrum. The material was essentially lacunar with 97 ± 2% of void space. Static compression tests on variably saturated rock wool samples provide the fact that the strain/stress behaviours depend on both the sample conditioning and the saturation level. Results showed that water exerts plastifying effect on mechanical behaviour of rock wool. The load-displacement curves and drainage evolution under different water saturation levels allowed exhibiting hydraulic retention capacities under stress. Finally, several tracer experiments on rock wool column considering continuous and batch feeding flow regime allowed: (i) to determine the flow model for each test case and the implications for water dynamic in rock wool medium, (ii) to assess the rock wool double porosity and discuss its advantages for wastewater treatment, (iii) to analyse the benefits effect for water treatment when the high level of rock wool hydric retention was associated with the plug-flow effect, and (iv) to discuss the practical contributions for compact filter conception and management.
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Affiliation(s)
- Adrien Wanko
- a Icube, UMR 7357, ENGEES, CNRS , Université de Strasbourg , 2 rue Boussingault, 67000 Strasbourg , France
| | - Julien Laurent
- a Icube, UMR 7357, ENGEES, CNRS , Université de Strasbourg , 2 rue Boussingault, 67000 Strasbourg , France
| | - Paul Bois
- a Icube, UMR 7357, ENGEES, CNRS , Université de Strasbourg , 2 rue Boussingault, 67000 Strasbourg , France
| | - Robert Mosé
- a Icube, UMR 7357, ENGEES, CNRS , Université de Strasbourg , 2 rue Boussingault, 67000 Strasbourg , France
| | - Christiane Wagner-Kocher
- b LPMT, EA 4365 , Université de Haute-Alsace , 11 rue Alfred Werner, 68093 Mulhouse Cedex , France
| | - Nadia Bahlouli
- a Icube, UMR 7357, ENGEES, CNRS , Université de Strasbourg , 2 rue Boussingault, 67000 Strasbourg , France
| | - Serge Tiffay
- c Rockwool France SAS , 111 rue du Château des Rentiers, 75013 Paris , France
| | - Bouke Braun
- d Rockwool B. V ., Industrieweg 15, 6045 JG Roermond , The Netherlands
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Bernard CA, Fond C, Ahzi S, Bahlouli N. Extraction of polymer stress-strain behavior in the presence of self-heating by the use of a simple model for the elastic-plastic deformation. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Christophe Fond
- ICube Laboratory; Université de Strasbourg/CNRS; Strasbourg France
| | - Saïd Ahzi
- ICube Laboratory; Université de Strasbourg/CNRS; Strasbourg France
- Qatar Environment and Energy Research Institute; Qatar Foundation Doha Qatar
| | - Nadia Bahlouli
- ICube Laboratory; Université de Strasbourg/CNRS; Strasbourg France
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Wang K, Boumbimba RM, Bahlouli N, Ahzi S, Muller R. Dynamic mechanical characterization and modelling of polypropylene based organoclay nanocomposite. EPJ Web of Conferences 2015. [DOI: 10.1051/epjconf/20159402025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wang K, Bahlouli N, Addiego F, Ahzi S, Rémond Y, Ruch D, Muller R. Effect of talc content on the degradation of re-extruded polypropylene/talc composites. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.04.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang K, Addiego F, Bahlouli N, Ahzi S, Rémond Y, Toniazzo V, Muller R. Analysis of thermomechanical reprocessing effects on polypropylene/ethylene octene copolymer blends. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.05.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bahlouli N, rogueda-Berriet C, Guillet J, Raveyre C. Propriétés rhéologiques et mécaniques des composites à matrice polypropylène pour l'automobile. Effets couplés de la pollution et du recyclage. ACTA ACUST UNITED AC 2010. [DOI: 10.3166/rcma.20.373-390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pessey D, Bahlouli N, Raveyre C, Guillet J, Ahzi S, Hiver JM, Dahoun A. Characterization of contamination effects for two polypropylene-based materials. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21451] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Pessey D, Bahlouli N, Ahzi S, Khaleel MA. Strain rate effects on the mechanical response of polypropylene-based composites deformed at small strains. Polym Sci Ser A 2008. [DOI: 10.1134/s0965545x08060126] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bahlouli N, Pessey D, Ahzi S, Rémond Y. Mechanical behavior of composite based polypropylene: Recycling and strain rate effects. ACTA ACUST UNITED AC 2006. [DOI: 10.1051/jp4:2006134200] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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