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Do MU, Moon NH, Suh KT, Kim JS, Lee SM, Shin WC. Safety of using a large femoral head on thin polyethylene for total hip arthroplasty based on different types of polyethylene. Sci Rep 2023; 13:22769. [PMID: 38123795 PMCID: PMC10733297 DOI: 10.1038/s41598-023-50217-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023] Open
Abstract
The use of a large femoral head in total hip arthroplasty (THA) to stabilize and reduce the incidence of dislocation is on the increase, but concerns arise when combining them with small acetabular components due to potential mechanical failures in thin polyethylene (PE) liners. A single-institution, retrospective cohort study was conducted on 116 patients with minimum 2-year follow-up who received 36-mm femoral heads and acetabular components ≤ 52 mm, using either remelted highly cross-linked polyethylene (remelted HXLPE) or vitamin E-infused HXLPE (VEPE). Osteolysis and implant loosening were not observed in either group. Although a fracture of the PE liner was observed in each group (1.7%), the clinical outcomes were excellent, as the mean modified Harris Hip Score (mHHS) at the last follow-up was 93.5. Moreover, the mean linear wear rates measured by digital imaging software in both groups were low, with 0.035 mm/y in remelted HXLPE and 0.030 mm/y in VEPE. In conclusion, The use of a large femoral head on a thin PE liner can be a viable treatment option in patients who need to prioritize stability; however, careful attention should be paid to mechanical fractures of the PE liner.
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Affiliation(s)
- Min Uk Do
- Department of Orthopedic Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, 20 Geumo-ro, Mulgeum-eup, Yangsan, Gyeongsangnam-do, 626-770, Republic of Korea
| | - Nam Hoon Moon
- Department of Orthopedic Surgery, Pusan National University Hospital, Busan, Republic of Korea
| | - Kuen Tak Suh
- Department of Orthopedic Surgery, Sehung Hospital, Pusan National University School of Medicine, Busan, Republic of Korea
| | - Jung Shin Kim
- Department of Orthopedic Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, 20 Geumo-ro, Mulgeum-eup, Yangsan, Gyeongsangnam-do, 626-770, Republic of Korea
| | - Sang-Min Lee
- Department of Orthopedic Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, 20 Geumo-ro, Mulgeum-eup, Yangsan, Gyeongsangnam-do, 626-770, Republic of Korea
| | - Won Chul Shin
- Department of Orthopedic Surgery, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, 20 Geumo-ro, Mulgeum-eup, Yangsan, Gyeongsangnam-do, 626-770, Republic of Korea.
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2
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Krull P, Steinbrück A, Grimberg AW, Melsheimer O, Morlock MM, Perka C. [Standard and special liner in primary hip arthroplasty : Current study and survey results from the German Arthroplasty Registry (EPRD)]. ORTHOPADIE (HEIDELBERG, GERMANY) 2023; 52:222-232. [PMID: 36635446 DOI: 10.1007/s00132-022-04333-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/25/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND Instability constitutes the main reason for revision hip arthroplasties. Modified polyethylene liners are designed to improve the stability of a hip replacement. In July 2022 The Bone & Joint Journal published a study with data of the German Arthroplasty Registry (EPRD). The study investigated mechanical failure of standard and modified liner designs in primary, cementless total hip arthroplasty. Following the study, the EPRD conducted a survey of German clinics to research the utilization of lipped liners in primary total hip replacement. METHODS The liner study included 151,096 primary, elective, cementless total hip arthroplasties. Data from November 2012 to November 2020 were obtained from the EPRD. Standard polyethylene liners were compared with lipped, angulated, offset and angulated/offset inlays. Cumulative incidences for endpoint revision due to mechanical complication were calculated with a competing risk analysis. The influence of other variables was investigated with a multivariate Cox regression. In the following online survey, 237 out of 789 hospitals completed a form. RESULTS AND CONCLUSION In our analysis, only offset liners were, compared to standard liners, associated with a reduced risk of mechanical failure in a short to medium follow up. However, the resultant joint reaction force is increased with offset liners due to the lateralization of the hip center of rotation. Thus, the long-term performance of offset liners needs to be observed. Our survey indicated that lipped liners were implanted more often if the posterior approach was used. Moreover, lipped liners were mostly positioned with the elevated rim in the biomechanically less optimal posterior-superior quadrant. To improve stability it is suggested to position the elevated rim in the posterior-inferior quadrant.
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Affiliation(s)
- Paula Krull
- Endoprothesenregister Deutschland (EPRD gGmbH), Str. des 17. Juni 106-108, 10623, Berlin, Deutschland. .,Centrum für Muskuloskeletale Chirurgie (CMSC), Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Deutschland.
| | - Arnd Steinbrück
- Endoprothesenregister Deutschland (EPRD gGmbH), Str. des 17. Juni 106-108, 10623, Berlin, Deutschland.,Orthopädisch Chirurgisches Kompetenzzentrum Augsburg (OCKA), Vinzenz-von-Paul-Platz 1, 86152, Augsburg, Deutschland
| | - Alexander W Grimberg
- Endoprothesenregister Deutschland (EPRD gGmbH), Str. des 17. Juni 106-108, 10623, Berlin, Deutschland
| | - Oliver Melsheimer
- Endoprothesenregister Deutschland (EPRD gGmbH), Str. des 17. Juni 106-108, 10623, Berlin, Deutschland
| | - Michael M Morlock
- Technische Universität Hamburg (TUHH), Am Schwarzenberg-Campus 1, 21073, Hamburg, Deutschland
| | - Carsten Perka
- Centrum für Muskuloskeletale Chirurgie (CMSC), Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Deutschland
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3
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Langlois J, Hamadouche M. What have we learned from 20 years of using highly crosslinked PE in total hip arthroplasty? Orthop Traumatol Surg Res 2023; 109:103457. [PMID: 36302450 DOI: 10.1016/j.otsr.2022.103457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 11/07/2022]
Abstract
Slightly more than 20 years after its first clinical use, highly cross-linked polyethylene (HXLPE) has been widely adopted. Despite initial concerns about oxidation and lack of fatigue resistance, first generation HXLPE, with 15 years of follow-up and widespread use, continues to provide excellent results, even in a young, active population. Remelted HXLPE might have a lower wear rate than annealed HXLPE and will no doubt have a better resistance to oxidation. Second generation materials, consisting of polyethylene (PE) that is sequentially irradiated then annealed and PE that is infused with antioxidants, also have provided encouraging short- and medium-term results. Data from national joint registers confirm data from clinical trials. Even in more challenging cases (dual mobility, hip resurfacing, revision surgery and thin liners), HXLPE has generated promising results. However, failures (rim fractures) have been documented, including for all the latest HXLPE generations. Consequently, certain precautions must be taken during its use and close patient monitoring is necessary.
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Affiliation(s)
- Jean Langlois
- Centre Orthopédique Santy, 24, avenue Paul Santy, Lyon, France; Hôpital Privé Jean-Mermoz, 55, avenue Jean-Mermoz, Lyon, France.
| | - Moussa Hamadouche
- Département de Chirurgie Orthopédique, Université de Paris, Assistance Publique-Hôpitaux de Paris, Hôpital Cochin, 27, rue du Faubourg Saint-Jacques, Paris, France
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4
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Spece H, Yarbrough RV, Kurtz SM. In Vivo Performance of Vitamin E Stabilized Polyethylene Implants for Total Hip Arthroplasty: A Review. J Arthroplasty 2022; 38:970-979. [PMID: 36481286 DOI: 10.1016/j.arth.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/28/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Vitamin E stabilization was introduced to improve the oxidative stability, wear resistance, and mechanical properties of highly crosslinked polyethylene (HXLPE). In this literature review, we asked: (1) How has vitamin E-stabilized HXLPE (VEPE) performed in vivo for total hip arthroplasty (THA) and how does it compare with conventional ultra-high molecular weight polyethylene (UHMWPE) and HXLPE without vitamin E; and (2) Is there an apparent difference in the clinical performance of VEPE created by blending versus diffusion? METHODS We performed a systematic search of the literature according to the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines using PubMed and Embase. Included studies reported the in vivo behavior of VEPE in THA. We reviewed 41 studies. RESULTS For all studies that compared polyethylene with and without VE stabilization, outcomes for VEPE were either equivalent or superior to the control group (for HXLPE without VE and conventional UHMWPE controls, respectively). Hip insert wear rates were generally less than 0.1 mm/year and in most cases were less than 0.05 mm/year. No VEPE components were revised for osteolysis or adverse outcomes specific to VE incorporation. CONCLUSION Across the literature, we found that VEPE was reported to be clinically effective for THA applications, with much of the research indicating positive clinical outcomes and lower or equivalent wear rates compared to conventional UHMWPE and HXLPE controls without VE. Instances of early component fracture were reported, but have multiple potential causes. There is a gap in the literature for comparison of blended and diffused components, so the in vivo impact of VE incorporation method remains to be seen. Overall, this study provides a comprehensive summary of VEPE clinical performance for THA and may serve as a resource for future investigations.
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Affiliation(s)
- Hannah Spece
- Implant Research Core, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA; Gyroid, LLC, Haddonfield, NJ
| | | | - Steven M Kurtz
- Implant Research Core, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA; Gyroid, LLC, Haddonfield, NJ
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Gromov K, Sillesen NH, Kallemose T, Husted H, Malchau H, Troelsen A. Safety of vitamin E-infused highwall liners for routine use in primary total hip arthroplasty: single centre, short-term follow-up of 1221 cases. Hip Int 2022; 32:56-61. [PMID: 33167730 DOI: 10.1177/1120700020969644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Introduction of new implants should be monitored closely to capture any signs of compromising patient safety. Vitamin E infused highly-crosslinked polyethylene liners (VEPE) offer the potential for reduced wear. Highwall liners have been hypothesised to result in increased wear and potential liner fractures. The aim of this study was to determine the 3-7-year follow-up of highwall VEPE for primary total hip arthroplasty (THA), focusing on liner-related complications. METHODS We included 1221 consecutive THA operations from July 2010 to May 2014 with minimum follow-up of 3 (3.1-6.8) years Data collected included demographics, implant data, complications, reoperations, and deaths. Data were cross-referenced with the Danish Hip Arthroplasty Registry in order to ensure validity and completeness. Acetabular shell position was measured using Martell Hip Analysis Suite in a subgroup of 931 THAs. RESULTS Cumulative stem revision and shell revision at 3-year follow-up was 3.4% and 0.4% respectively. There were no revisions due to liner failure. Reason for revision included 11 dislocations, 15 soft-tissue revisions for infection, 44 stem revisions of which 34 were periprosthetic fractures and 13 shell revisions of which 6 were combined shell and stem revisions. CONCLUSION Early follow-up of VEPE liners for primary THA have not shown any revisions associated with liner failure. Continued monitoring of new materials are necessary to capture any signs of compromised patient safety.
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Affiliation(s)
- Kirill Gromov
- Department of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Nanna H Sillesen
- Department of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Thomas Kallemose
- Clinical Research Centre, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Henrik Husted
- Department of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | - Henrik Malchau
- Department of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark.,Harris Orthopaedic Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Anders Troelsen
- Department of Orthopaedic Surgery, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
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Kim KB, Lee SM, Moon NH, Do MU, Shin WC. Early unexpected failure of a vitamin E-infused highly cross-linked polyethylene liner: A case report. Medicine (Baltimore) 2021; 100:e27454. [PMID: 34731119 PMCID: PMC8519234 DOI: 10.1097/md.0000000000027454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 09/20/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Total hip arthroplasty (THA) with a polyethylene (PE) liner is 1 of the most effective and successful treatment strategies for end-stage hip disorders. Vitamin E-infused highly cross-linked polyethylene is theoretically known to prevent failure due to oxidative degradation in the body, and is resistant to wear; therefore, successful long-term survival of THA is expected. PATIENT CONCERNS In June 2019, approximately 1.5 years after THA, the patient sat down and stood up without any specific issue; however, an unusual bullet sound occurred around the left hip joint. Since then, his discomfort persisted, and he was admitted to the emergency department. DIAGNOSIS Plain radiography and metal artifact reduction computed tomography performed in the emergency department revealed eccentric elevation of the prosthetic femoral head and suspected PE liner failure. INTERVENTION Revision surgery was performed for modular component exchange. To reduce the dislocation risk without performing cup exchange, conversion to dual-mobility articulation was performed. OUTCOMES During the regular follow-up post-surgery, the patient could perform daily life activities without any discomfort, and dislocation was not observed. At 2 years postoperatively, no significant changes were observed in the radiographic images. LESSONS This case report presents an unexpected failure of THA due to superior rim fracture and excessive wear at the locking mechanism of the vitamin E-infused highly cross-linked polyethylene liner. This is an interesting case, as early PE liner failure occurred without strong labor intensity or trauma. A modular component exchange was performed with a dual-mobility bearing, and no issues were observed approximately 2 years after the reoperation. Therefore, third-generation highly cross-linked polyethylene liners can also cause early failure without a clear cause, and this case report highlights the necessity of considering several strategies for reoperation. STUDY DESIGN Case report.
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Affiliation(s)
- Kyeong Baek Kim
- Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Sang-Min Lee
- Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Nam Hoon Moon
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Yangsan, Republic of Korea
- Department of Orthopaedic Surgery, Pusan National University Hospital, Busan, Republic of Korea
| | - Min Uk Do
- Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Won Chul Shin
- Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Yangsan, Republic of Korea
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Hemmilä M, Laaksonen I, Matilainen M, Eskelinen A, Haapakoski J, Puhto AP, Kettunen J, Pamilo K, Mäkelä KT. Implant survival of 2,723 vitamin E-infused highly crosslinked polyethylene liners in total hip arthroplasty: data from the Finnish Arthroplasty Register. Acta Orthop 2021; 92:316-322. [PMID: 33517823 PMCID: PMC8231410 DOI: 10.1080/17453674.2021.1879513] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Background and purpose - The use of crosslinked polyethylene in total hip arthroplasty (THA) has decreased wear remarkably. It has been suggested that the antioxidative effects of vitamin E may enhance the wear properties of polyethylene even further. This study evaluates revision rates between vitamin E-infused polyethylene liners (E1 and E-poly, ZimmerBiomet, Warsaw, IN, USA) versus moderately crosslinked polyethylene (ModXLPE) liners from the same manufacturer used in primary THA.Patients and methods - We conducted a study based on data from the Finnish Arthroplasty Register. The study group consisted of 2,723 THAs with a vitamin E-infused liner and a reference group of 2,707 THAs with a moderately crosslinked polyethylene liner. Survivorship, revision risk, and re-revision causes were compared between groups.Results - The 7-year survival of the vitamin E-infused polyethylene liner group and of the reference group with revision for any reason as the endpoint was comparable (94% [95% CI 92.9-94.9] and 93% [CI 91.9-93.9], respectively). The adjusted hazard ratio (HR) for any revision was similar between the groups (0.7 [CI 0.4-1.1]). When revision for aseptic loosening was studied as the endpoint, the survival for the study group was 99% (CI 98.6-99.4) and for the reference group 99% (CI 98.7-99.5), and the risk of revision was comparable between the study groups (HR 1.3 [CI 0.7-2.5]).Interpretation - After an observation period of 7 years vitamin E-infused liners shows results equal to results obtained with crosslinked polyethylene liners.
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Affiliation(s)
- Matias Hemmilä
- Department of Orthopaedic Surgery, University of Turku and Turku University Hospital, Turku; ,Correspondence:
| | - Inari Laaksonen
- Department of Orthopaedic Surgery, University of Turku and Turku University Hospital, Turku;
| | - Markus Matilainen
- Turku PET Centre, University of Turku and Turku University Hospital, Turku;
| | - Antti Eskelinen
- Coxa Hospital for Joint Replacement and Faculty of Medicine and Health Technologies, Tampere University, Tampere;
| | | | - Ari-Pekka Puhto
- Division of Operative Care, Department of Orthopaedic and Trauma Surgery, Oulu University Hospital, Oulu;
| | - Jukka Kettunen
- Department of Orthopaedics and Traumatology, Kuopio University Hospital, Kuopio, Finland
| | - Konsta Pamilo
- Coxa Hospital for Joint Replacement and Faculty of Medicine and Health Technologies, Tampere University, Tampere;
| | - Keijo T Mäkelä
- Department of Orthopaedic Surgery, University of Turku and Turku University Hospital, Turku;
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Li G, Peng Y, Zhou C, Jin Z, Bedair H. The effect of structural parameters of total hip arthroplasty on polyethylene liner wear behavior: A theoretical model analysis. J Orthop Res 2020; 38:1587-1595. [PMID: 31876311 DOI: 10.1002/jor.24577] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 12/21/2019] [Indexed: 02/04/2023]
Abstract
Using large femoral heads in total hip arthroplasty (THA) has been widely advocated to improve the function and longevity of the components. However, increasing the head size has been shown to accelerate polyethylene liner wear. Few studies have investigated the effect of other important structural parameters (such as polyethylene liner thickness, metal cup size, head-liner conformity, loading conditions, etc.) on the biomechanical functions of the THAs. In this study, an analytical model was used to evaluate the polyethylene liner wear characteristics of the THAs (defined using a biomechanical wear factor) with various structural parameters of the THAs and loading conditions. For all the THA systems examined in this study, under the same loading conditions, a larger head leads to increasing contact areas, lower contact stresses, and higher biomechanical wear factors. When the head size is fixed, a decrease in the polyethylene liner thickness or a decrease in the head-liner conformity leads to higher peak contact stresses and smaller contact areas and consequently, lower biomechanical wear factors. This study provides a parametric analysis tool for the optimal design/selection of the THA systems and for prediction of early effects of various structural parameters on the biomechanical function (such as contact stresses) and longevity (such as polyethylene liner wear) of the THA systems.
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Affiliation(s)
- Guoan Li
- Department of Orthopaedic Surgery, Orthopaedic Bioengineering Research Center, Newton-Wellesley Hospital, Harvard Medical School, Newton, Massachusetts
| | - Yun Peng
- Department of Orthopaedic Surgery, Orthopaedic Bioengineering Research Center, Newton-Wellesley Hospital, Harvard Medical School, Newton, Massachusetts
| | - Chaochao Zhou
- Department of Orthopaedic Surgery, Orthopaedic Bioengineering Research Center, Newton-Wellesley Hospital, Harvard Medical School, Newton, Massachusetts.,Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Zhongmin Jin
- Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China.,Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK
| | - Hany Bedair
- Department of Orthopaedic Surgery, Orthopaedic Bioengineering Research Center, Newton-Wellesley Hospital, Harvard Medical School, Newton, Massachusetts.,Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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9
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Langlois J, Hamadouche M. Recent update on crosslinked polyethylene in total hip arthroplasty. SICOT J 2020; 6:13. [PMID: 32412408 PMCID: PMC7227368 DOI: 10.1051/sicotj/2020013] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 02/02/2023] Open
Abstract
More than two decades after their clinical introduction, crosslinked polyethylenes (XLPE) have been widely adopted. Though concerns were initially raised regarding oxidation and brittleness, on a large scale, the first generation of XLPE continues to be highly effective 15 years after the surgery, even in a young and active population. Remelted XLPE might display lower wear rates than annealed XLPE. Second generation XLPEs, not only including sequentially irradiated and annealed but also associated with antioxidants, demonstrate encouraging short- to mid-term results. Registry data support clinical trial reports. Even in less favorable settings (lipped liners, dual mobility cups, revision surgery, hip resurfacing) results are promising. However, failures (fractures) have already been described. Therefore, a high level of surveillance remains crucial.
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Affiliation(s)
- Jean Langlois
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Centre Orthopédique Santy 24, avenue Paul Santy 69008 Lyon France
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Hôpital Privé Jean-Mermoz 55, avenue Jean-Mermoz 69008 Lyon France
| | - Moussa Hamadouche
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Département de Chirurgie Orthopédique, Université Paris-Descartes, Assistance Publique-Hôpitaux de Paris, Hôpital Cochin 27, rue du Faubourg Saint-Jacques 75014 Paris France
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