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Turgeon TR, Hedden DR, Bohm ER, Burnell CD. Radiostereometric analysis and clinical outcomes of a novel reverse total hip system at two years. Bone Jt Open 2023; 4:385-392. [PMID: 37222043 PMCID: PMC10206517 DOI: 10.1302/2633-1462.45.bjo-2023-0018.r1] [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: 05/25/2023] Open
Abstract
Aims Instability is a common cause of failure after total hip arthroplasty. A novel reverse total hip has been developed, with a femoral cup and acetabular ball, creating enhanced mechanical stability. The purpose of this study was to assess the implant fixation using radiostereometric analysis (RSA), and the clinical safety and efficacy of this novel design. Methods Patients with end-stage osteoarthritis were enrolled in a prospective cohort at a single centre. The cohort consisted of 11 females and 11 males with mean age of 70.6 years (SD 3.5) and BMI of 31.0 kg/m2 (SD 5.7). Implant fixation was evaluated using RSA as well as Western Ontario and McMaster Universities Osteoarthritis Index, Harris Hip Score, Oxford Hip Score, Hip disability and Osteoarthritis Outcome Score, 38-item Short Form survey, and EuroQol five-dimension health questionnaire scores at two-year follow-up. At least one acetabular screw was used in all cases. RSA markers were inserted into the innominate bone and proximal femur with imaging at six weeks (baseline) and six, 12, and 24 months. Independent-samples t-tests were used to compare to published thresholds. Results Mean acetabular subsidence from baseline to 24 months was 0.087 mm (SD 0.152), below the critical threshold of 0.2 mm (p = 0.005). Mean femoral subsidence from baseline to 24 months was -0.002 mm (SD 0.194), below the published reference of 0.5 mm (p < 0.001). There was significant improvement in patient-reported outcome measures at 24 months with good to excellent results. Conclusion RSA analysis demonstrates excellent fixation with a predicted low risk of revision at ten years of this novel reverse total hip system. Clinical outcomes were consistent with safe and effective hip replacement prostheses.
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Affiliation(s)
- Thomas R. Turgeon
- Concordia Joint Replacement Group, Winnipeg, Canada
- Department of Surgery, University of Manitoba, Winnipeg, Canada
| | - David R. Hedden
- Concordia Joint Replacement Group, Winnipeg, Canada
- Department of Surgery, University of Manitoba, Winnipeg, Canada
| | - Eric R. Bohm
- Concordia Joint Replacement Group, Winnipeg, Canada
- Department of Surgery, University of Manitoba, Winnipeg, Canada
| | - Colin D. Burnell
- Concordia Joint Replacement Group, Winnipeg, Canada
- Department of Surgery, University of Manitoba, Winnipeg, Canada
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Kumar A, Mondal S, Ghosh R. Biomechanical performance of the cemented acetabular cup with combined effects of bone quality, implant material combinations and bodyweight. Proc Inst Mech Eng H 2022; 236:1309-1327. [DOI: 10.1177/09544119221113698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The objective of this study is to understand the combined effects of bone quality, implant materials and bodyweight on the biomechanical performance of cemented acetabular cup. Additionally, the performance of the cemented acetabular cup was evaluated for obesity cases or obese people. A total of 84 FE models (based on CT data) were developed based on combinations of three different cancellous bone material distributions to represent bone quality, four different implant material combinations and seven different bodyweights. The biomechanical performance of the acetabular cup was evaluated based on bone stress (both cortical and cancellous bone), cement mantle stress, micromotion and contact pressure between the acetabular cup and femoral head. Cortical bone stress, cancellous bone stress, cement stress, the contact pressure between implants and micromotion between implants are affected by different bone quality, implant material combinations and bodyweights. An increase in bodyweight would increase the cortical bone stress, cancellous bone stress, cement stress, contact pressure between implants and micromotion between implants. However, bodyweight affects the cortical and cancellous bone stress more (stiff rise of the bone stresses; nonlinear relation) as compared to other output parameters (mostly linear relation). Comparing cortical and cancellous bone stress, the stress versus bodyweight curve is much stiffer (stiff rise in the curve) for cortical bone than cancellous bone and that even further increases as bone quality decreases. Especially considering obesity cases or obese people (very high bodyweight), the performance of the cemented acetabular component is poor. Graphical abstract [Formula: see text]
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Affiliation(s)
- Ajay Kumar
- School of Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India
| | - Subrata Mondal
- School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin, Ireland
| | - Rajesh Ghosh
- School of Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India
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Miura T, Kijima H, Kimura R, Watanabe J, Okazaki Y, Miyakoshi N. Efficacy and Safety of Acetabular Cup without Screw Fixation in Total Hip Arthroplasty: A Systematic Review and Meta-Analysis. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:1058. [PMID: 36013524 PMCID: PMC9413682 DOI: 10.3390/medicina58081058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/20/2022] [Accepted: 08/02/2022] [Indexed: 11/16/2022]
Abstract
Background and Objectives: Adequate initial fixation of the uncemented acetabular component in total hip arthroplasty is necessary to achieve long-term survival. Although screw fixation contributes to improved cup stability, there is currently no consensus on the use of this method. This study aimed to assess the existing randomized controlled trials (RCTs) on the efficacy and safety of cup fixation in total hip arthroplasty without screws. Materials and Methods: We searched the EMBASE, MEDLINE, Cochrane Central Register of Controlled Trials, World Health Organization International Clinical Trials Registry Platform, and ClinicalTrials.gov databases to identify RCTs published before February 2022. Primary outcomes were reoperation, cup migration, and Harris Hip Score. Secondary outcomes were the presence of a radiolucent line in the acetabular region, translation and rotation movement, and polyethylene wear. We conducted meta-analyses using the random-effects models. The revised Cochrane risk-of-bias tool was used to assess the risk of bias for outcomes of interest; the Grading of Recommendations, Assessment, Development, and Evaluation approach was used to summarize the body of evidence. Results: We included six reports from four studies. Total hip arthroplasty without screw fixation to the acetabular cup had little to no effect on reoperation (pooled relative risk, 0.98; 95% confidence interval, 0.14-6.68; I2 = 0%), cup migration (pooled relative risk, 1.72; 95% confidence interval, 0.29-10.33; I2 = 1%), Harris Hip Score (mean difference, 1.19; 95% confidence interval, -1.31-3.70; I2 = 0%), radiolucent line (pooled relative risk, 5.91; 95% confidence interval, 0.32-109.35), translation and rotation of all axes, and polyethylene wear (mean difference, 0.01; 95% confidence interval, -0.01-0.04; I2 = 0%), with very low certainty of evidence on all measures. Conclusions: The efficacy of acetabular cups without screw fixation in total hip arthroplasty remains uncertain, suggesting the need for prudent clinical application. Further large-scale, well-designed studies with low risk of bias are required.
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Affiliation(s)
- Takanori Miura
- Department of Orthopedic Surgery, Tazawako Hospital 17-1 Ukiyozaka Obonai, Tazawako, Senboku 014-1201, Akita, Japan
| | - Hiroaki Kijima
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Akita, Japan
| | - Ryota Kimura
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Akita, Japan
| | - Jun Watanabe
- Scientific Research Workshop Peer Support Group (SRWS-PSG), Osaka, Osaka, Japan
- Department of Surgery, Division of Gastroenterological, General and Transplant Surgery, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke City 329-0498, Tochigi, Japan
- Center for Community Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke City 329-0498, Tochigi, Japan
| | - Yuji Okazaki
- Scientific Research Workshop Peer Support Group (SRWS-PSG), Osaka, Osaka, Japan
- Department of Emergency Medicine, Hiroshima City Hiroshima Citizens Hospital, 7-33, Motomachi, Naka-ku, Hiroshima City 730-8518, Hiroshima, Japan
| | - Naohisa Miyakoshi
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Akita, Japan
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MOSEGAARD SB, JØRGENSEN PB, JAKOBSEN SS, DAUGAARD H, SØBALLE K, STILLING M. Larger 5-year migration but similar polyethylene wear of cementless hemispherical cups with electrochemically applied hydroxyapatite (BoneMaster) coating compared with porous plasma-spray titanium: a randomized 5-year RSA study. Acta Orthop 2022; 93:658-664. [PMID: 35848733 PMCID: PMC9290214 DOI: 10.2340/17453674.2022.3976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE BoneMaster (BM) is a thin electrochemically applied hydroxyapatite (HA) implant coating marketed with expectations of improved osseointegration properties but less polyethylene (PE) wear. We compared the midterm cup migration and PE wear of cementless porous-coated hemispherical cups with and without BM. PATIENTS AND METHODS In this patient-blinded, randomized controlled trial, 53 patients with a mean age of 64 years (55-75) received total hip arthroplasty with a porous-coated (P) or porous and BoneMaster (PBM) coated Exceed cup and ArCom E1 infused PE. Patients were followed with RSA, Hip Osteoarthritis Outcome Score (HOOS), and Euro-Qol-5-3L (EQ-5D) at 3 and 6 months, and 1-, 2-, and 5-year follow-up. RESULTS At 5-year follow-up, total translation and maximum total point motion was 0.28 mm (95% CI 0.08; 0.47) and 0.52 mm (CI 0.12; 0.93) higher in the PBM group than in the P group. PE wear was comparable between PBM and P cups, and 2D wear rate from 1-year follow-up to last follow-up was 0.03 mm (CI 0.02-0.03). The 5-year anterior translation was 0.05 mm (CI -0.10 to 0.21) in the normal BMD group and 0.40 mm (CI 0.22-0.57) in the osteopenia group. INTERPRETATION At 5-year follow-up, Exceed cups in the PBM group migrated more than in the P group but the PE wear rate was low and similar. This study does not indicate any advantage of additional BoneMaster coating compared with porous coating alone on cementless hemispherical cups with regards to migration, polyethylene wear, and clinical outcomes.
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Affiliation(s)
- Sebastian Breddam MOSEGAARD
- AutoRSA Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus;,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus
| | - Peter Bo JØRGENSEN
- AutoRSA Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus;,Department of Clinical Medicine, Aarhus University, Aarhus
| | | | - Henrik DAUGAARD
- Department of Orthopedics, Slagelse Hospital, Slagelse, Denmark
| | - Kjeld SØBALLE
- Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus;,Department of Clinical Medicine, Aarhus University, Aarhus
| | - Maiken STILLING
- AutoRSA Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus;,Department of Clinical Medicine, Aarhus University, Aarhus
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5
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Are additional screws required for press-fit fixation of cementless acetabular cups? A systematic review and meta-analysis. J Orthop Traumatol 2022; 23:9. [PMID: 35142933 PMCID: PMC8831679 DOI: 10.1186/s10195-022-00629-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 01/25/2022] [Indexed: 01/10/2023] Open
Abstract
Background Press-fit cementless acetabular cup is widely used in total hip arthroplasty (THA). However, the use of additional screws for the acetabular cup has been extensively debated. The purpose of this review is to compare the stability, revision rate, wear rate, and clinical scores of cementless acetabular cups with and without screws in THA. Materials and Methods Comprehensive literature searches of the following databases were performed: Cochrane Library, Pubmed, Web of Science, OVID, Elsevier ClinicalKey, Clinicaltrials.gov, and EMBASE. We searched for trials that compared cementless acetabular cups with screws or without screws, and were published in the English language. We evaluated the stability of the prosthesis by osteolysis and migration. The clinical scores included Harris hip scores (HHS) and pain scores. Results Nineteen articles involving 4046 THAs met the inclusion criteria. Our analysis revealed that additional screws did not increase the stability of acetabular cups, and there was no statistical significance between the groups with and without screws in osteolysis and clinically relevant migration. Revision rates showed no significant difference between the groups with and without screws. There was no difference in wear between the two groups. Our analysis showed no difference in pain scores and HHS between groups. Conclusion Press-fit without screws could achieve sufficient acetabular cup stability. Acetabular cups without screws showed no difference from acetabular cups with screws in many outcomes. Additional screws are not required for cementless acetabular cups. Level of evidence: Level III.
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Sevaldsen K, Schnell Husby O, Lian ØB, Farran KM, Schnell Husby V. Is the French Paradox cementing philosophy superior to the standard cementing? A randomized controlled radiostereometric trial and comparative analysis. Bone Joint J 2022; 104-B:19-26. [PMID: 34969272 PMCID: PMC8779947 DOI: 10.1302/0301-620x.104b1.bjj-2021-0325.r2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Aims Highly polished stems with force-closed design have shown satisfactory clinical results despite being related to relatively high early migration. It has been suggested that the minimal thickness of cement mantles surrounding the femoral stem should be 2 mm to 4 mm to avoid aseptic loosening. The line-to-line cementing technique of the femoral stem, designed to achieve stem press-fit, challenges this opinion. We compared the migration of a highly polished stem with force-closed design by standard and line-to-line cementing to investigate whether differences in early migration of the stems occur in a clinical study. Methods In this single-blind, randomized controlled, clinical radiostereometric analysis (RSA) study, the migration pattern of the cemented Corail hip stem was compared between line-to-line and standard cementing in 48 arthroplasties. The primary outcome measure was femoral stem migration in terms of rotation and translation around and along with the X-, Y-, and Z- axes measured using model-based RSA at three, 12, and 24 months. A linear mixed-effects model was used for statistical analysis. Results Results from mixed model analyses revealed a lower mean retroversion for line-to-line (0.72° (95% confidence interval (CI) 0.38° to 1.07°; p < 0.001), but no significant differences in subsidence between the techniques (-0.15 mm (95% CI -0.53 to 0.227; p = 0.429) at 24 months. Radiolucent lines measuring < 2 mm wide were found in three and five arthroplasties cemented by the standard and line-to-line method, respectively. Conclusion The cemented Corail stem with a force-closed design seems to settle earlier and better with the line-to-line cementing method, although for subsidence the difference was not significant. However, the lower rate of migration into retroversion may reduce the wear and cement deformation, contributing to good long-term fixation and implant survival. Cite this article: Bone Joint J 2022;104-B(1):19–26.
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Affiliation(s)
- Kirsti Sevaldsen
- Department of Orthopaedic Surgery, Kristiansund Hospital, Kristiansund, Norway.,Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway
| | - Otto Schnell Husby
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway.,Clinic of Orthopaedics, Rheumatology and Dermatology, Department of Orthopaedic Surgery, St. Olav's University Hospital, Trondheim, Norway
| | - Øystein Bjerkestrand Lian
- Department of Orthopaedic Surgery, Kristiansund Hospital, Kristiansund, Norway.,Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway
| | | | - Vigdis Schnell Husby
- Clinic of Orthopaedics, Rheumatology and Dermatology, Department of Orthopaedic Surgery, St. Olav's University Hospital, Trondheim, Norway.,Department of Health Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Ålesund, Norway
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7
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Nugent M, Campbell DG, Lewis PL, Cuthbert AR, Solomon LB. Acetabular screws do not improve early revision rates in primary total hip arthroplasty. An instrumented registry analysis. INTERNATIONAL ORTHOPAEDICS 2021; 45:593-604. [PMID: 33479835 DOI: 10.1007/s00264-021-04949-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/16/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND Initial stability of uncemented acetabular components in total hip arthroplasty (THA) is important for osseointegration and potentially enhanced by screw fixation. We used Australian Orthopaedic Association National Joint Replacement Registry data to determine whether screw usage influences uncemented acetabular component survival. METHODS Primary THA with uncemented acetabular components performed for osteoarthritis from 1999 to 2018 was included. Survivorship was calculated using Kaplan-Meier estimates of cumulative percent revision (CPR). Comparisons used Cox proportional hazards method. An instrumental variable analysis adjusted for surgeon preference for screws as a confounding factor was used. RESULTS Three hundred thirty thousand one hundred ninety-two THAs were included (31.8% with screws, 68.2% without). Two hundred twenty thousand six hundred seven were included in the instrumental variable analysis. Revision rate of acetabular components (all causes) was higher with screws during the first six years (hazard ratio (HR) = 1.45 (95% CI 1.34, 1.57), p < 0.001) and lower thereafter (HR = 0.81 (95% CI 0.67, 0.98), p = 0.027). Revision rate of acetabular components for loosening was higher with screws over the entire study period (HR = 1.73 (95% CI 1.51, 1.98), p < 0.001). Overall THA revision rate was higher with screws during the first six years (HR = 1.20 (95% CI 1.15, 1.26), p < 0.001) but lower thereafter (HR = 0.89 (95% CI 0.81, 0.98), p = 0.020). Revision rate for dislocation was higher with screws over the entire period (HR = 1.16 (95% CI 1.06, 1.26), p < 0.001). Instrumental variable analysis revealed higher revision rates with acetabular screws in the first six years. (HR = 1.18 (95% CI 1.09-1.29), p < 0.001). CONCLUSION Screws did not confer a protective effect against acetabular loosening and were not associated with long-term negative consequences.
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Affiliation(s)
- Mary Nugent
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Port Road, Adelaide, SA5000, Australia.
| | | | - Peter L Lewis
- Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR), Adelaide, SA5000, Australia
| | - Alana R Cuthbert
- Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR), Adelaide, SA5000, Australia
| | - Lucien B Solomon
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Port Road, Adelaide, SA5000, Australia
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8
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Fei C, Wang PF, Wei W, Qu SW, Yang K, Li Z, Zhuang Y, Zhang BF, Zhang K. Relationship between use of screws and acetabular cup stability in total hip arthroplasty: a meta-analysis. J Int Med Res 2020; 48:300060520903649. [PMID: 32054354 PMCID: PMC7111112 DOI: 10.1177/0300060520903649] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Objective The relationship between the use of screws and acetabular cup stability in total hip arthroplasty (THA) remains controversial. We evaluated cup stability in THA with and without the use of screws. Methods We performed a systematic literature search to identify studies on cup stability relative to the use of screws in patients undergoing THA before October 2018. Methodological quality assessment and data collection were performed by two individual reviewers. Meta-analysis was performed using Review Manager version 5.3.5. Results We included seven trials involving 1402 patients (1469 THAs): 767 patients (809 THAs) with screws and 635 patients (660 THAs) without screws. The findings of meta-analysis indicated that uncemented acetabular component fixation with the use of additional screws was not correlated with migration of the cup, migration on roentgen stereophotogrammetry, or reoperation after THA. Moreover, operation time was not significantly different according to whether screws were used. There was no relationship between use of additional screws and osteoporosis or Harris Hip Score; however, THA with or without the use of screws might be related to bone sclerosis in the C1 region. Conclusion Currently, limited evidence shows that the use of screws during THA may not improve cup stability.
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Affiliation(s)
- Chen Fei
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China.,Xi'an Medical University, Beilin District, Xi'an, Shaanxi Province, China
| | - Peng-Fei Wang
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Wei Wei
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Shuang-Wei Qu
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Kun Yang
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Zhi Li
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Yan Zhuang
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Bin-Fei Zhang
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
| | - Kun Zhang
- Department of Orthopedic Trauma, Hong-Hui Hospital, Xi'an Jiaotong University, Beilin District, Xi'an, Shaanxi Province, China
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Thoen PS, Nordsletten L, Pripp AH, Röhrl SM. Results of a randomized controlled trial with five-year radiostereometric analysis results of vitamin E-infused highly crosslinked versus moderately crosslinked polyethylene in reverse total hip arthroplasty. Bone Joint J 2020; 102-B:1646-1653. [DOI: 10.1302/0301-620x.102b12.bjj-2020-0721.r1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Aims Vitamin E-infused highly crosslinked polyethylene (VEPE) has been introduced into total hip arthroplasty (THA) with the aim of further improving the wear characteristics of moderately and highly crosslinked polyethylenes (ModXLPE and HXLPE). There are few studies analyzing the outcomes of vitamin E-infused components in cemented arthroplasty, though early acetabular component migration has been reported. The aim of this study was to measure five-year polyethylene wear and acetabular component stability of a cemented VEPE acetabular component compared with a ModXLPE cemented acetabular component. Methods In a prospective randomized controlled trial (RCT), we assessed polyethylene wear and acetabular component stability (primary outcome) with radiostereometric analysis (RSA) in 68 patients with reverse hybrid THA at five years follow-up. Patients were randomized to either a VEPE or a ModXLPE cemented acetabular component. Results Mean polyethylene wear in the proximal direction was 0.17 mm (SD 0.15) for the VEPE group and 0.20 mm (SD 0.09) for the ModXLPE group (p = 0.005) at five years. Annual proximal wear rates were 0.03 mm/year (VEPE) and 0.04 mm/year (ModXLPE). Total 3D wear was 0.21 mm (SD 0.26) and 0.23 mm (SD 0.10) for the VEPE and ModXLPE groups, respectively (p = 0.009). Total 3D cup translation was 0.72 mm (SD 0.70) (VEPE) and 0.50 mm (SD 0.44) (ModXLPE) (p = 0.409). Conclusion At five years, there was less polyethylene wear in the VEPE group than in the ModXLPE group. Both VEPE and ModXLPE cemented components showed low annual wear rates. Component stability was similar in the two groups and remained constant up to five years. Whether these results will equate to a lower long-term revision rate is still unknown. Cite this article: Bone Joint J 2020;102-B(12):1646–1653.
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Affiliation(s)
- Peder S. Thoen
- Division of Orthopedic Surgery, Oslo University Hospital Ullevål, Oslo, Norway
- Department of Surgery, Vestfold Hospital Trust, Tønsberg, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Lars Nordsletten
- Division of Orthopedic Surgery, Oslo University Hospital Ullevål, Oslo, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Are H. Pripp
- Department of Biostatistics, Oslo University Hospital Ullevål, Oslo, Norway
| | - Stephan M. Röhrl
- Division of Orthopedic Surgery, Oslo University Hospital Ullevål, Oslo, Norway
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10
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Rahman L, Ibrahim MS, Somerville L, Teeter MG, Naudie DD, McCalden RW. Minimum ten-year follow-up of a randomized trial comparing acetabular component fixation of two porous in-growth surfaces using radiosteriometric analysis. Bone Jt Open 2020; 1:653-662. [PMID: 33215098 PMCID: PMC7659663 DOI: 10.1302/2633-1462.110.bjo-2020-0118.r1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Aims To compare the in vivo long-term fixation achieved by two acetabular components with different porous ingrowth surfaces using radiostereometric analysis (RSA). Methods This was a minimum ten-year follow-up of a prospective randomized trial of 62 hips with two different porous ingrowth acetabular components. RSA exams had previously been acquired through two years of follow-up. Patients returned for RSA examination at a minimum of ten years. In addition, radiological appearance of these acetabular components was analyzed, and patient-reported outcome measures (PROMs) obtained. Results In all, 15 hips were available at ten years. There was no statistically significant difference in PROMS between the two groups; PROMs were improved at ten years compared to preoperative scores. Conventional radiological assessment revealed well-fixed components. There was minimal movement for both porous surfaces in translation (X, Y, Z, 3D translation in mm (median and interquartile range (IQR)), StikTite (Smith and Nephew, Memphis, Tennessee, USA): 0.03 (1.08), 0.12 (0.7), 0.003 (2.3), 0.37 (0.30), and Roughcoat (Smith and Nephew): -0.6 (0.59),–0.1 (0.49), 0.1 (1.12), 0.48 (0.38)), and rotation (X, Y, Z rotation in degrees (median and IQR), (Stiktite: -0.4 (3), 0.28 (2), -0.2 (1), and Roughcoat: - 0.4 (1),–0.1 (1), 0.2 (2)). There was no statistically significant difference between the two cohorts (p-value for X, Y, Z, 3D translation - 0.54, 0.46, 0.87, 0.55 and for X, Y, Z rotation - 0.41, 0.23, 0.23 respectively) at ten years. There was significant correlation between two years and ten years 3D translation for all components (r = 0.81(p =< 0.001)). Conclusion Both porous ingrowth surfaces demonstrated excellent fixation on plain radiographs and with RSA at ten years. Short-term RSA data are good predictors for long-term migration data.
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Affiliation(s)
- Luthfur Rahman
- London Health Sciences Centre, University of Western Ontario, The Rorabeck-Bourne Joint Replacement Institute, London, Ontario, Canada.,Department of Orthopaedics, University College London Hospitals NHS Foundation Trust, London, UK
| | - Mazin S Ibrahim
- London Health Sciences Centre, University of Western Ontario, The Rorabeck-Bourne Joint Replacement Institute, London, Ontario, Canada
| | - Lyndsay Somerville
- London Health Sciences Centre, University of Western Ontario, The Rorabeck-Bourne Joint Replacement Institute, London, Ontario, Canada
| | - Matthew G Teeter
- Department of Surgery, Schulich School of Medicine and Dentistry, London, Ontario, Canada
| | - Douglas D Naudie
- London Health Sciences Centre, University of Western Ontario, The Rorabeck-Bourne Joint Replacement Institute, London, Ontario, Canada
| | - Richard W McCalden
- London Health Sciences Centre, University of Western Ontario, The Rorabeck-Bourne Joint Replacement Institute, London, Ontario, Canada
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11
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Tabori-Jensen S, Mosegaard SB, Hansen TB, Stilling M. Inferior stabilization of cementless compared with cemented dual-mobility cups in elderly osteoarthrosis patients: a randomized controlled radiostereometry study on 60 patients with 2 years' follow-up. Acta Orthop 2020; 91:246-253. [PMID: 32024400 PMCID: PMC8023886 DOI: 10.1080/17453674.2020.1720978] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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 - Elderly patients may benefit from a dislocation low-risk dual-mobility (DM) articulation in total hip arthroplasty, but the best cup fixation method is unknown. We compared cup migration for cemented and cementless DM cups using radiostereometry.Patients and methods - In a patient-blinded randomized trial, 60 patients (33 female) with osteoarthritis were allocated to cemented (n = 30) or cementless (n = 30) Avantage DM cup fixation. Criteria were age above 70 years, and T-score above -4. We investigated cup migration, periprosthetic bone mineral density (BMD), and patient-reported outcome measures (PROMs) until 24 months postoperative follow-up.Results - At 24 months mean proximal cup migration was 0.11 mm (95% CI 0.00-0.23) for cemented cups and 0.09 mm (CI -0.09 to 0.28) for cementless cups. However, cementless cups generally migrated more than cemented cups at 12 and 24 months. Cemented cups had no measurable migration from 3 months' follow-up, while cementless cups had not yet stabilized at 24 months in all rotations. Cementless cups showed statistically significantly more maximum total point motion (MTPM) at 12- and 24-month follow-up compared with cemented cups in patients with low systemic BMD (p = 0.01). Periprosthetic BMD changes did not statisticially significantly correlate to proximal migration in either cup fixation group (p > 0.05). PROMs improved similarly in both groups.Interpretation - Cemented cups were well fixed at 3 months. The cementless cups migrated more in patients with low BMD, showed an inconsistent pattern of migration, and migrated in different directions during the first and second year without tendency to stabilization. Cemented fixation of the Avantage DM cup seems safer in elderly patients.
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Affiliation(s)
- Steffan Tabori-Jensen
- University Clinic for Hand, Hip and Knee Surgery, Regional Hospital West Jutland, Holstebro;; ,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Sebastian Breddam Mosegaard
- University Clinic for Hand, Hip and Knee Surgery, Regional Hospital West Jutland, Holstebro;; ,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Torben B Hansen
- University Clinic for Hand, Hip and Knee Surgery, Regional Hospital West Jutland, Holstebro;; ,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Maiken Stilling
- University Clinic for Hand, Hip and Knee Surgery, Regional Hospital West Jutland, Holstebro;; ,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark,Correspondence:
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12
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Horváth T, Hanák L, Hegyi P, Butt E, Solymár M, Szűcs Á, Varga O, Thien BQ, Szakács Z, Csonka E, Hartmann P. Hydroxyapatite-coated implants provide better fixation in total knee arthroplasty. A meta-analysis of randomized controlled trials. PLoS One 2020; 15:e0232378. [PMID: 32396538 PMCID: PMC7217427 DOI: 10.1371/journal.pone.0232378] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/14/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND The potential advantages of hydroxyapatite (HA)-coated cementless total knee arthroplasty (TKA) implants are bone stock preservation and biological fixation. Studies comparing the outcomes of HA-coated cementless, non HA-coated cementless (uncemented) and cemented TKA implants reported contradictory data. Our aim was to provide a comparison of the effects of HA coating of tibial stem on the stability and functionality of TKA implants. METHODS A systematic literature search was performed using MEDLINE, Scopus, EMBASE and the CENTRAL databases up to May 31st, 2019. The primary outcome was Maximum Total Point Motion (MTPM) of the tibial stem. This parameter is determined by radiosterometric analysis and refers to the migration pattern of the prosthesis stems. The clinical outcomes of the implanted joints were evaluated by the Knee Society Knee Score (KSS) and the Knee Society Function Score (KFS). Weighted mean difference (WMD) with 95% confidence interval (CI) were calculated with the random-effects model. RESULTS Altogether, 11 randomized controlled trials (RCTs) with 902 patients for primary TKA implants were included. There was a statistically significant difference in the MTPM values with the use of HA-coated and uncoated uncemented implants (WMD = +0.28, CI: +0.01 to +0.56, P<0.001). However, HA-coated stems showed significantly higher migration when compared with the cemented prostheses (WMD = -0.29, CI: -0.41 to -0.16, P<0.001). The KSS values of HA-coated implants were significantly higher than those for the uncemented implants; moreover, KSS and KFS outcome scores were statistically not different between the HA-coated and cemented prosthesis cases. CONCLUSION HA-coating yields better stability than other, uncemented prostheses. More importantly, the HA-coating is not outperformed by cemented prosthesis in providing good functional outcome.
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Affiliation(s)
- Tamara Horváth
- Institute of Surgical Research, University of Szeged, Szeged, Hungary
| | - Lilla Hanák
- Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Péter Hegyi
- Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Edina Butt
- Department of Traumatology, University of Szeged, Szeged, Hungary
| | - Margit Solymár
- Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Ákos Szűcs
- Department of Surgery, University of Semmelweis, Budapest, Hungary
| | - Orsolya Varga
- Department of Preventive Medicine, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
| | - Bui Quoc Thien
- Department of Preventive Medicine, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
| | - Zsolt Szakács
- Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, Medical School, University of Pécs, Pécs, Hungary
| | - Endre Csonka
- Department of Traumatology, University of Szeged, Szeged, Hungary
| | - Petra Hartmann
- Institute of Surgical Research, University of Szeged, Szeged, Hungary
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13
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Jørgensen PB, Daugaard H, Jakobsen SS, Lamm M, Søballe K, Stilling M. Higher early proximal migration of hemispherical cups with electrochemically applied hydroxyapatite (BoneMaster) on a porous surface compared with porous surface alone: a randomized RSA study with 53 patients. Acta Orthop 2019; 91:26-32. [PMID: 31698977 PMCID: PMC7008237 DOI: 10.1080/17453674.2019.1687860] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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 - BoneMaster (BM) is an electrochemically deposited hydroxyapatite (HA) implant-coating, which is evenly distributed, thin, and quickly resorbed. It is designed to stimulate osseointegration and early implant stability and alleviate longer-term HA-induced third-body polyethylene wear. This study evaluates early cup migration and functional outcomes of cementless porous-coated hemispherical cups with or without BM.Patients and methods - In a patient-blinded, randomized, controlled trial 53 patients at mean 64 years (55-75) with coxarthritis were operated with an Exceed cup (Zimmer Biomet) and Bi-Metric stem (Zimmer Biomet) with porous and BM coating (PBM) or with porous coating alone (P). Follow-ups were performed postoperatively and at 3, 6, 12, and 24 months. Effect measures were cup migration measured with RSA and PROMs.Results - At 6-month follow-up, proximal cup migration in the PBM group (0.09 mm, 95% CI 0.02-0.20) was higher than in the P group (0.25 mm, CI 0.15-0.35). At 1- and 2-year follow-up, cup migration in all 6 degrees of freedom was similar between groups (p > 0.2). From before surgery to 2-year follow-up, Oxford Hip Score (OHS) increased by 17 points (CI 14-20). Hip disability and Osteoarthritis Outcome Score (HOOS) increased in all sub-scores, but was more pronounced for PBM cups compared with P cups in the Symptoms sub-score (p = 0.04).Interpretation - Contrary to expectations, PBM cups had higher early migration than P cups. At 2-year follow-up, migration was similar between groups. There seems to be no early benefit of BM coating on acetabular cups.
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Affiliation(s)
- Peter Bo Jørgensen
- Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus; ,Department of Clinical Medicine, Aarhus University, Aarhus; ,Correspondence:
| | - Henrik Daugaard
- Department of Orthopaedic Surgery, Gentofte Hospital, Hellerup, Denmark
| | | | - Martin Lamm
- Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus;
| | - Kjeld Søballe
- Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus; ,Department of Clinical Medicine, Aarhus University, Aarhus;
| | - Maiken Stilling
- Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus; ,Department of Clinical Medicine, Aarhus University, Aarhus;
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14
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Imai H, Miyawaki J, Kamada T, Maruishi A, Takeba J, Miura H. Radiolucency around highly porous sockets and hydroxyapatite-coated porous sockets in total hip arthroplasty for hip dysplasia. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2018; 29:611-618. [PMID: 30488136 PMCID: PMC6422951 DOI: 10.1007/s00590-018-2351-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/25/2018] [Indexed: 02/07/2023]
Abstract
Studies over the past decade have reported that the use of highly porous sockets in total hip arthroplasty (THA) results in osseointegration and long-term implant stability. However, some reports have raised concerns regarding radiographic evidence of poor osseointegration with features of fibrous tissue ingrowth. The purpose of this study was to compare clinical and radiographic assessments of highly porous sockets with those of hydroxyapatite (HA)-coated porous sockets in THA for hip dysplasia (DDH) at least 1 year after surgery. A total of 127 patients (136 hips) were recruited for the study. Of these, 94 patients (101 hips) received highly porous sockets with clustered screws, while 33 patients (35 hips) received HA-coated porous sockets with clustered screws. There was no difference in clinical outcomes between the two types of sockets. All HA-coated porous sockets were radiographically stable, without radiolucent lines. Fifteen hips had radiolucent lines in two or three DeLee and Charnley zones, accompanied by sclerotic lines along the circumferences of the highly porous sockets. A significant difference in the height of the preoperative osteophyte of the anterior acetabular wall was observed between 86 hips with one or no radiolucent lines and 15 hips with two or three radiolucent lines. In cases of DDH with atrophic bone remodeling pattern, highly porous sockets with multiple screws may be used, while HA-coated porous sockets with clustered screws result in better sealing of the bone–component interface.
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Affiliation(s)
- Hiroshi Imai
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan.
| | - Joji Miyawaki
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan
| | - Tomomi Kamada
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan
| | - Akira Maruishi
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan
| | - Jun Takeba
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan
| | - Hiromasa Miura
- Department of Bone and Joint Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan
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Are CT Scans a Satisfactory Substitute for the Follow-Up of RSA Migration Studies of Uncemented Cups? A Comparison of RSA Double Examinations and CT Datasets of 46 Total Hip Arthroplasties. BIOMED RESEARCH INTERNATIONAL 2017; 2017:3681458. [PMID: 28243598 PMCID: PMC5294349 DOI: 10.1155/2017/3681458] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 11/18/2016] [Accepted: 12/12/2016] [Indexed: 02/03/2023]
Abstract
As part of the 14-year follow-up of a prospectively randomized radiostereometry (RSA) study on uncemented cup fixation, two pairs of stereo radiographs and a CT scan of 46 hips were compared. Tantalum beads, inserted during the primary operation, were detected in the CT volume and the stereo radiographs and used to produce datasets of 3D coordinates. The limit of agreement between the combined CT and RSA datasets was calculated in the same way as the precision of the double RSA examination. The precision of RSA corresponding to the 99% confidence interval was 1.36°, 1.36°, and 0.60° for X-, Y-, and Z-rotation and 0.40, 0.17, and 0.37 mm for X-, Y-, and Z-translation. The limit of agreement between CT and RSA was 1.51°, 2.17°, and 1.05° for rotation and 0.59, 0.56, and 0.74 mm for translation. The differences between CT and RSA are close to the described normal 99% confidence interval for precision in RSA: 0.3° to 2° for rotation and 0.15 to 0.6 mm for translation. We conclude that measurements using CT and RSA are comparable and that CT can be used for migration studies for longitudinal evaluations of patients with RSA markers.
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16
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Minten MJM, Heesterbeek PJC, Spruit M. No effect of additional screw fixation of a cementless, all-polyethylene press-fit socket on migration, wear, and clinical outcome. Acta Orthop 2016; 87:363-7. [PMID: 27299418 PMCID: PMC4967278 DOI: 10.1080/17453674.2016.1190244] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Background and purpose - Additional screw fixation of the all-polyethylene press-fit RM cup (Mathys) has no additional value for migration, in the first 2 years after surgery. However, the medium-term and long-term effects of screw fixation remain unclear. We therefore evaluated the influence of screw fixation on migration, wear, and clinical outcome at 6.5 years using radiostereometric analysis (RSA). Patients and methods - This study involved prolonged follow-up from a previous randomized controlled trial (RCT). We analyzed RSA radiographs taken at baseline and at 1-, 2-, and 6.5-year follow-up. Cup migration and wear were assessed using model-based RSA software. Wear was calculated as translation of the femoral head model in relation to the cup model. Total translation, rotation, and wear were calculated mathematically from results of the orthogonal components. Results - 27 patients (15 with screw fixation and 12 without) were available for follow-up at 6.5 (5.6-7.2) years. Total translation (0.50 mm vs. 0.56 mm) and rotation (1.01 degrees vs. 1.33 degrees) of the cup was low, and was not significantly different between the 2 groups. Wear increased over time, and was similar between the 2 groups (0.58 mm vs. 0.53 mm). Wear rate (0.08 mm/year vs. 0.09 mm/year) and clinical outcomes were also similar. Interpretation - Our results indicate that additional screw fixation of all-polyethylene press-fit RM cups has no additional value regarding medium-term migration and clinical outcome. The wear rate was low in both groups.
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Affiliation(s)
| | | | - Maarten Spruit
- Department of Orthopedics, Sint Maartenskliniek, Nijmegen, the Netherlands
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17
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Madanat R, Mäkinen TJ, Aro HT, Bragdon C, Malchau H. Adherence of hip and knee arthroplasty studies to RSA standardization guidelines. A systematic review. Acta Orthop 2014; 85:447-55. [PMID: 24954489 PMCID: PMC4164860 DOI: 10.3109/17453674.2014.934187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE Guidelines for standardization of radiostereometry (RSA) of implants were published in 2005 to facilitate comparison of outcomes between various research groups. In this systematic review, we determined how well studies have adhered to these guidelines. METHODS We carried out a literature search to identify all articles published between January 2000 and December 2011 that used RSA in the evaluation of hip or knee prosthesis migration. 2 investigators independently evaluated each of the studies for adherence to the 13 individual guideline items. Since some of the 13 points included more than 1 criterion, studies were assessed on whether each point was fully met, partially met, or not met. RESULTS 153 studies that met our inclusion criteria were identified. 61 of these were published before the guidelines were introduced (2000-2005) and 92 after the guidelines were introduced (2006-2011). The methodological quality of RSA studies clearly improved from 2000 to 2011. None of the studies fully met all 13 guidelines. Nearly half (43) of the studies published after the guidelines demonstrated a high methodological quality and adhered at least partially to 10 of the 13 guidelines, whereas less than one-fifth (11) of the studies published before the guidelines had the same methodological quality. Commonly unaddressed guideline items were related to imaging methodology, determination of precision from double examinations, and also mean error of rigid-body fitting and condition number cutoff levels. INTERPRETATION The guidelines have improved methodological reporting in RSA studies, but adherence to these guidelines is still relatively low. There is a need to update and clarify the guidelines for clinical hip and knee arthroplasty RSA studies.
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Affiliation(s)
- Rami Madanat
- Helsinki University Central Hospital, Helsinki,Harris Orthopaedic Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | | | - Hannu T Aro
- Turku University Hospital and University of Turku, Turku, Finland
| | - Charles Bragdon
- Harris Orthopaedic Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Henrik Malchau
- Harris Orthopaedic Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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18
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Halma JJ, Vogely HC, Dhert WJ, Van Gaalen SM, de Gast A. Do monoblock cups improve survivorship, decrease wear, or reduce osteolysis in uncemented total hip arthroplasty? Clin Orthop Relat Res 2013; 471:3572-80. [PMID: 23913339 PMCID: PMC3792292 DOI: 10.1007/s11999-013-3144-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 06/25/2013] [Indexed: 01/31/2023]
Abstract
BACKGROUND Monoblock acetabular components used in uncemented total hip arthroplasty (THA) have certain mechanical characteristics that potentially reduce acetabular osteolysis and polyethylene wear. However, the degree to which they achieve this goal is not well documented. QUESTIONS/PURPOSES The purpose of this study was to use a systematic review of controlled trials to test the hypothesis that monoblock cups have superior (1) polyethylene wear rate; (2) frequency of cup migration; (3) frequency of acetabular osteolysis; and (4) frequency of aseptic loosening compared with modular components used in uncemented THA. METHODS A systematic search was conducted in the Medline, Embase, and Cochrane electronic databases to assemble all controlled trials comparing monoblock with modular uncemented acetabular components in primary THA. Included studies were considered "best evidence" if the quality score was either ≥ 50% on the Cochrane Back Review Group checklist or ≥ 75% the Newcastle-Ottawa quality assessment scale. A total of seven publications met our inclusion criteria. RESULTS Best evidence analysis showed no difference in polyethylene wear rate, the frequency of cup migration, and aseptic loosening between monoblock and modular acetabular components. No convincing evidence was found for the claim that lower frequencies of acetabular osteolysis are observed with the use of monoblock cups compared with modular uncemented cups. CONCLUSIONS The purported benefits of monoblock cups were not substantiated by this systematic review of controlled studies in that polyethylene wear rates and frequencies of cup failure and acetabular osteolysis were similar to those observed with modular implants. Other factors should therefore drive implant selection in cementless THA.
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Affiliation(s)
- Jelle J Halma
- Clinical Orthopedic Research Center-midden Nederland (CORC-mN), Department of Orthopaedics, Diakonessenhuis Hospital, PO Box 80250, 3508 TG, Utrecht, The Netherlands,
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19
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Ni SH, Guo L, Jiang TL, Zhao J, Zhao YG. Press-fit cementless acetabular fixation with and without screws. INTERNATIONAL ORTHOPAEDICS 2013; 38:7-12. [PMID: 23982638 DOI: 10.1007/s00264-013-2075-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 08/06/2013] [Indexed: 12/21/2022]
Abstract
PURPOSE Cementless acetabular fixation for total hip arthroplasty (THA) is widely used. The question of using screws for a better primary and secondary acetabular fixation has been discussed in the literature in recent years. The aim of this meta-analysis was to compare fixation of acetabular cups with and without screws in total hip arthroplasty. METHODS Electronic databases Embase, PubMed and Cochrane Library were used to search for randomised controlled trials reported through May 2013 of cementless acetabular fixation for THA with and without screws. Two independent reviewers assessed the trials for eligibility and quality. All related data matching our standards were abstracted for meta-analysis by RevMan 5.0. Evaluation criteria included revisions, migration and osteolysis. RESULTS A total of 1,130 THAs enrolled into five trials were included in this meta-analysis. All studies compared fixation of acetabular cups with and without screws, and our pooled data showed no statistical significance between the two surgical methods in revision, migration and osteolysis. CONCLUSION There is no significant difference between cementless acetabular fixation for THA with and without screws in revisions, migration or osteolysis.
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Affiliation(s)
- Sheng-Hui Ni
- Department of Orthopedic Surgery, First Affiliated Hospital, China Medical University, Shenyang, Liaoning, 110001, People's Republic of China
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20
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Lindalen E, Dahl J, Nordsletten L, Snorrason F, Høvik Ø, Röhrl S. Reverse hybrid and cemented hip replacement compared using radiostereometry and dual-energy X-ray absorptiometry: 43 hips followed for 2 years in a prospective trial. Acta Orthop 2012; 83:592-8. [PMID: 23116437 PMCID: PMC3555444 DOI: 10.3109/17453674.2012.742393] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE Total hip replacement (THR) with a reverse hybrid (RH), a combination of a cemented polyethylene cup and a cementless femoral stem, has been increasingly used in Scandinavia. In a randomized trial, we compared an RH THR with a proximal hydroxyapatite- (HA-) coated stem to a conventional cemented THR. Both groups received the same polyethylene cup. PATIENTS AND METHODS 51 patients (52 hips) were included. Radiostereometry (RSA) and dual-energy X-ray absorptiometry (DEXA) were performed postoperatively and after 6, 12, and 24 months. 42 patients (43 hips) were followed for 2 years. RESULTS Mean cup rotation around the x-axis was 0.13° for the cemented group and -0.24° for the RH group (p = 0.03). Cup migration in the other axes, and stem migration and wear were similar between the 2 study groups. Bone remodeling around the cup was also similar between the groups. Bone loss in Gruen zone 1 was 18% for the cementless stems, as compared to an increase of 1.4% for the cemented ones (p < 0.001). Bone loss was similar in the other Gruen zones. Harris hip score and Oxford hip score were similar pre- and postoperatively in the 2 groups. INTERPRETATION In the present study, RH THR with a cementless hydroxyapatite-coated stem and conventional cemented THR did not show any major differences regarding stem migration and bone loss after 2 years of follow-up.
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Affiliation(s)
- Einar Lindalen
- Department of Orthopaedics, Lovisenberg Deaconal Hospital, Oslo
| | - Jon Dahl
- Department of Orthopaedics, Oslo University Hospital, Oslo
| | - Lars Nordsletten
- Department of Orthopaedics, Oslo University Hospital, Oslo,University of Oslo, Oslo, Norway
| | | | - Øystein Høvik
- Department of Orthopaedics, Lovisenberg Deaconal Hospital, Oslo
| | - Stephan Röhrl
- Department of Orthopaedics, Oslo University Hospital, Oslo
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Abstract
BACKGROUND The acetabular component has remained the weakest link in hip arthroplasty regarding achievement of long-term survival. Primary fixation is a prerequisite for long-term performance. For this reason, we investigated the stability of a unique cementless titanium-coated elastic monoblock socket and the influence of supplementary screw fixation. PATIENT AND METHODS During 2006-2008, we performed a randomized controlled trial on 37 patients (mean age 63 years (SD 7), 22 females) in whom we implanted a cementless press-fit socket. The socket was implanted with additional screw fixation (group A, n = 19) and without additional screw fixation (group B, n = 18). Using radiostereometric analysis with a 2-year follow-up, we determined the stability of the socket. Clinically relevant migration was defined as > 1 mm translation and > 2º rotation. Clinical scores were determined. RESULTS The sockets without screw fixation showed a statistically significantly higher proximal translation compared to the socket with additional screw fixation. However, this higher migration was below the clinically relevant threshold. The numbers of migratory sockets were not significantly different between groups. After the 2-year follow-up, there were no clinically relevant differences between groups A and B regarding the clinical scores. 1 patient dropped out of the study. In the others, no sockets were revised. INTERPRETATION We found that additional screw fixation is not necessary to achieve stability of the cementless press-fit elastic RM socket. We saw no postoperative benefit or clinical effect of additional screw fixation.
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Affiliation(s)
- Dean Pakvis
- Department Orthopaedic and Trauma Surgery, Orthopaedic Centre OCON, Hengelo
| | - Joan Luites
- Departments of Research, Development and Education
| | | | - Maarten Spruit
- Orthopaedic Surgery, Sint Maartenskliniek, Nijmegen, the Netherlands
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22
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Stilling M, Kold S, de Raedt S, Andersen NT, Rahbek O, Søballe K. Superior accuracy of model-based radiostereometric analysis for measurement of polyethylene wear: A phantom study. Bone Joint Res 2012; 1:180-91. [PMID: 23610688 PMCID: PMC3626226 DOI: 10.1302/2046-3758.18.2000041] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 06/29/2012] [Indexed: 12/17/2022] Open
Abstract
Objectives The accuracy and precision of two new methods of model-based
radiostereometric analysis (RSA) were hypothesised to be superior
to a plain radiograph method in the assessment of polyethylene (PE)
wear. Methods A phantom device was constructed to simulate three-dimensional
(3D) PE wear. Images were obtained consecutively for each simulated
wear position for each modality. Three commercially available packages
were evaluated: model-based RSA using laser-scanned cup models (MB-RSA),
model-based RSA using computer-generated elementary geometrical
shape models (EGS-RSA), and PolyWare. Precision (95% repeatability
limits) and accuracy (Root Mean Square Errors) for two-dimensional
(2D) and 3D wear measurements were assessed. Results The precision for 2D wear measures was 0.078 mm, 0.102 mm, and
0.076 mm for EGS-RSA, MB-RSA, and PolyWare, respectively. For the
3D wear measures the precision was 0.185 mm, 0.189 mm, and 0.244
mm for EGS-RSA, MB-RSA, and PolyWare respectively. Repeatability
was similar for all methods within the same dimension, when compared between
2D and 3D (all p > 0.28). For the 2D RSA methods, accuracy was below
0.055 mm and at least 0.335 mm for PolyWare. For 3D measurements,
accuracy was 0.1 mm, 0.2 mm, and 0.3 mm for EGS-RSA, MB-RSA and
PolyWare respectively. PolyWare was less accurate compared with
RSA methods (p = 0.036). No difference was observed between the
RSA methods (p = 0.10). Conclusions For all methods, precision and accuracy were better in 2D, with
RSA methods being superior in accuracy. Although less accurate and
precise, 3D RSA defines the clinically relevant wear pattern (multidirectional).
PolyWare is a good and low-cost alternative to RSA, despite being
less accurate and requiring a larger sample size.
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Affiliation(s)
- M Stilling
- Aarhus University Hospital, Department of Orthopaedics, Tage-Hansens Gade 2, 8000 Aarhus C, Denmark
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23
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Superior 11-year survival but higher polyethylene wear of hydroxyapatite-coated Mallory-Head cups. Hip Int 2012; 22:35-40. [PMID: 22383319 DOI: 10.5301/hip.2012.9075] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/12/2011] [Indexed: 02/04/2023]
Abstract
Hydroxyapatite (HA) coating of implant surfaces is believed to improve longevity of uncemented total hip arthroplasty (THA). However; it is speculated that HA particles may cause third body wear of the polyethylene (PE) liner with subsequent osteolysis and aseptic loosening of implants. We performed a retrospective comparison of two patient populations with cementless Mallory-Head acetabular components. The patients were identified in the Danish hip arthroplasty Registry (DHR); 77 patients had HA-coated cups and 73 patients had non-HA coated cups. Anteroposterior (AP) radiographs were analysed for PE wear, osteolysis was quantified and survival of the acetabular components was compared. The mean follow-up was 11 years. There were no cup revisions in the HA group and 7 cup revisions in the non-HA group (P<0.01). The reason for revision in all cases was aseptic loosening of both stem and cup. The amount of osteolysis was significantly increased around cups in the non-HA group. The two-dimensional linear PE wear-rate of 0.18 mm/year was higher (P<0.001) in the group with HA coated cups compared with 0.12 mm/year in the group with non-HA coated cups. The mean age was lower (P=0.001) in the HA group (57 years) compared with the non-HA group (63 years). After 11.1 years of follow-up non-HA coated cups had a higher revision rate. Increased PE wear with HA-coated cups did not have a negative influence on the revision rate, but may result in a need for revision surgery over time.
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24
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Wolf O, Mattsson P, Milbrink J, Larsson S, Mallmin H. The effects of different weight-bearing regimes on press-fit cup stability: a randomised study with five years of follow-up using radiostereometry. INTERNATIONAL ORTHOPAEDICS 2011; 36:735-40. [PMID: 22143314 DOI: 10.1007/s00264-011-1413-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 11/01/2011] [Indexed: 11/30/2022]
Abstract
PURPOSE There is little evidence to support immediate weight bearing after uncemented total hip arthroplasty (THA). METHODS Thirty-seven patients with unilateral osteoarthritis of the hip received a press-fit cup. Cup stability was assessed with radiostereometry (RSA) over five years. Patients were randomised to immediate full weight bearing, or partial weight bearing for three months. RESULTS At five years, we found no difference in micro-motion as assessed with radiostereometry. Numerically, there was more proximal translation and increased inclination with immediate weight bearing, but these values barely exceeded the precision limit for the method. Pooled data for the two groups revealed translations of 0.1-0.3 mm and rotations of 0.2-0.3° over the five year follow-up period. CONCLUSIONS We found no adverse effects of immediate weight bearing after THA in relation to stability of these press-fit cups. Early mobilisation might have other advantages.
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Affiliation(s)
- Olof Wolf
- Surgical Sciences, Orthopaedic, Uppsala, Sweden,
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25
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Zilkens C, Djalali S, Bittersohl B, Kälicke T, Kraft CN, Krauspe R, Jäger M. Migration pattern of cementless press fit cups in the presence of stabilizing screws in total hip arthroplasty. Eur J Med Res 2011; 16:127-32. [PMID: 21486725 PMCID: PMC3352209 DOI: 10.1186/2047-783x-16-3-127] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The aim of this study was to evaluate the initial acetabular implant stability and late acetabular implant migration in press fit cups combined with screw fixation of the acetabular component in order to answer the question whether screws are necessary for the fixation of the acetabular component in cementless primary total hip arthroplasty. One hundred and seven hips were available for follow-up after primary THA using a cementless, porous-coated acetabular component. A total of 631 standardized radiographs were analyzed digitally by the "single-film-x-ray-analysis" method (EBRA). One hundred and one (94.4 %) acetabular components did not show significant migration of more than 1 mm. Six (5.6%) implants showed migration of more than 1 mm. Statistical analysis did not reveal preoperative patterns that would identify predictors for future migration. Our findings suggest that the use of screw fixation for cementless porous-coated acetabular components for primary THA does not prevent cup migration.
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Affiliation(s)
- C Zilkens
- Deputy Chief, Department of Orthopaedics, Heinrich-Heine University Medical School, Moorenstr. 5, 40225 Duesseldorf, Germany.
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26
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[Reconstruction of large acetabular defects using trabecular metal augments]. OPERATIVE ORTHOPADIE UND TRAUMATOLOGIE 2011; 22:268-77. [PMID: 20676821 DOI: 10.1007/s00064-010-8026-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Revision of cup and reconstruction of original center of rotation. High primary and secondary stability. Prevention of additional bone loss. INDICATIONS Osseous defects at the anterior-cranial, cranial and posterior-cranial rim of acetabulum. Larger cavitary, medial or oval defects (Paprosky IIb-IIIb). Segmental defects (anterior column up to half of host bone, posterior column up to one third of host bone). CONTRAINDICATIONS Infection of total hip arthroplasty. Pelvic discontinuity (Paprosky IV). SURGICAL TECHNIQUE Exposure of acetabulum and detection of defects. Complete removal of soft tissue from acetabulum, reaming of sclerotic bone, if necessary. Adaptation of trial augments to close an oval defect to a round defect and to reach an uncontained defect, respectively. Adaptation of trial cup. In case of sufficient stability, fixation of final augment with two or three screws in cranial bone stock. The screws should be directed to iliosacral joint. Augmentation with allogenic bone chips is possible in the region of wedge and acetabulum as well. Sealing of rough augment surface with bone cement. Implantation of cup, fixation with screws. Application of insert. POSTOPERATIVE MANAGEMENT Depending on bone defects, full weight bearing is possible. In cases of severe bone defects, reduction of weight bearing to 20 kg for 6 weeks is recommended. Postoperative physiotherapy is possible in most cases. RESULTS Between 2005 and 2007, 38 patients with acetabular defects type IIIa und IIIb according to Paprosky underwent reconstruction using the TMT system (Trabecular Metal Technology). After 25 months, a significant functional improvement was seen in all patients. The Merle d'Aubigné Score increased from 6 points preoperatively to 13 points postoperatively, the Harris Hip Score from 29 to 78 points. Two revisions were necessary because of loosening or migration of the cup.
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27
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Stilling M, Larsen K, Andersen NT, Søballe K, Kold S, Rahbek O. The final follow-up plain radiograph is sufficient for clinical evaluation of polyethylene wear in total hip arthroplasty. A study of validity and reliability. Acta Orthop 2010; 81:570-8. [PMID: 20860443 PMCID: PMC3214745 DOI: 10.3109/17453674.2010.506632] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Accepted: 04/13/2010] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE Radiostereometric analysis (RSA) is a highly accurate tool for assessment of polyethylene (PE) wear in total hip arthroplasty (THA); however, PE wear measurements in clinical studies are often limited to plain radiographs. We evaluated the agreement between PE wear measured with PolyWare software, which uses plain radiographs, and by model-based RSA, which uses stereo radiographs. METHODS Measurements of PE wear postoperatively and at final follow-up (after mean 6 years) on plain radiographs of 12 patients after cementless THA were evaluated with PolyWare software and the results were compared with those from RSA as the gold standard (Model-based RSA using elementary geometrical shape models; EGS-RSA). With PolyWare, we either used the final radiographic follow-up (PW1) only or both the postoperative follow-up and the final follow-up (PW2). RESULTS The 2D mean wear measured (in mm) was 0.80, 1.07, and 0.60 for the PW2, PW1, and RSA method. 2D intra-method repeatability was similar for PW1 and RSA with limits of agreement (LOAs, in mm) of ± 0.22, and ± 0.23, respectively. 2D inter-method concurrent validity was best between PW1 and EGS-RSA with LOAs of ± 0.55. For 2D linear wear measurements, the PW1 method had a clinical repeatability similar to that of RSA. INTERPRETATION PW1 is sufficient for retrospective determination of 2D wear from medium-term wear measurements above 0.5 mm, It alleviates the need for baseline plain radiographs, has a clinical precision similar to that of RSA, and is easy and inexpensive to use.
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Affiliation(s)
- Maiken Stilling
- Department of Orthopedics, Aarhus University Hospital, Denmark.
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28
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Abstract
BACKGROUND Hydroxyapatite (HA) is the main inorganic component of bone, and HA coating is widely used on acetabular cups in hip arthroplasty. It has been suggested that this surface finish improves cup survival. METHODS All patients registered in the Swedish Hip Arthroplasty Register between 1992 and 2007 with an uncemented acetabular implant that was available either with or without HA coating were identified. 8,043 total hip arthroplasties (THAs) with the most common cup types (Harris-Galante, Romanus, and Trilogy) were investigated. A Cox regression model including type of coating, age, sex, primary diagnosis, cup type, and type of stem fixation was used to calculate adjusted risk ratios (RRs) for the risk of revision. RESULTS HA coating was a risk factor for cup revision due to aseptic loosening (adjusted RR 1.7; 95% CI: 1.3-2). Age at primary arthroplasty of < 50 years, a diagnosis of pediatric hip disease, the use of a cemented stem, and the Romanus and Harris-Galante cup types were also associated with statistically significantly increased risk of cup revision due to aseptic loosening. INTERPRETATION Our findings question the routine use of HA-coated cups in primary total hip arthroplasty. With some designs, this practice may even increase the risk of loosening-resulting in revision surgery.
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Affiliation(s)
- Stergios Lazarinis
- Department of Orthopaedics, Institute of Surgical Sciences, Uppsala University HospitalUppsala
| | - Johan Kärrholm
- Department of Orthopaedics, Institute of Surgical Science, Sahlgrenska University Hospital, Göteborg University, MölndalSweden
| | - Nils P Hailer
- Department of Orthopaedics, Institute of Surgical Sciences, Uppsala University HospitalUppsala
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29
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Inferior survival of hydroxyapatite versus titanium-coated cups at 15 years. Clin Orthop Relat Res 2009; 467:2872-9. [PMID: 19330391 PMCID: PMC2758968 DOI: 10.1007/s11999-009-0796-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Accepted: 03/05/2009] [Indexed: 01/31/2023]
Abstract
UNLABELLED Hydroxyapatite (HA) particles have long been suspected to disintegrate from implant surfaces, become entrapped in joint spaces of orthopaedic bearing couples, and start a cascade leading to progressive polyethylene (PE) wear, increased osteolysis, and aseptic loosening. We compared cup revision at 15 years' followup in a randomized group of patients with 26 cementless THA components with titanium (Ti) versus first-generation HA coating. We also assessed radiographic PE wear and osteolysis to the 12-year followup or end point revision at a minimum of 5 years (mean, 10.9 years; range, 5-12.6 years). Two Ti-coated cups (17%) and eight HA-coated cups (57%) were revised at 15 years' followup. Femoral head penetration rate was 0.46 mm/year (standard deviation, 0.26) with the HA-coated cups (n = 12) and 0.38 mm/year (standard deviation, 0.14) with the Ti-coated cups (n = 10); we observed a wide variance of linear wear with the HA-coated cups. We also observed a positive association between high wear rate and revision, and between a high volume of osteolysis and revision. Our findings suggest inferior survival of medium-thickness spray-dried HA-coated cups with individual cases of excessive PE wear and premature cup failure. These findings apply to first-generation modular cups and may not apply to other cup designs and new HA-coating technologies. LEVEL OF EVIDENCE Level III, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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30
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Zenz P, Stiehl JB, Knechtel H, Titzer-Hochmaier G, Schwagerl W. Ten-year follow-up of the non-porous Allofit cementless acetabular component. ACTA ACUST UNITED AC 2009; 91:1443-7. [DOI: 10.1302/0301-620x.91b11.22368] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cementless acetabular fixation has demonstrated superior long-term durability in total hip replacement, but most series have studied implants with porous metal surfaces. We retrospectively evaluated the results of 100 consecutive patients undergoing total hip replacement where a non-porous Allofit component was used for primary press-fit fixation. This implant is titanium alloy, grit-blasted, with a macrostructure of forged teeth and has a biradial shape. A total of 81 patients (82 hips) were evaluated at final follow-up at a mean of 10.1 years (8.9 to 11.9). The Harris Hip Score improved from a mean 53 points (23 to 73) pre-operatively to a mean of 96 points (78 to 100) at final review. The osseointegration of all acetabular components was radiologically evaluated with no evidence of loosening. The survival rate with revision of the component as the endpoint was 97.5% (95% confidence interval 94 to 100) after 11.9 years. Radiolucency was found in one DeLee-Charnley zone in four acetabular components. None of the implants required revision for aseptic loosening. Two patients were treated for infection, one requiring a two-stage revision of the implant. One femoral stem was revised for osteolysis due to the production of metal wear debris, but the acetabular shell did not require revision. This study demonstrates that a non-porous titanium acetabular component with adjunct surface fixation offers an alternative to standard porous-coated implants.
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Affiliation(s)
- P. Zenz
- Orthopaedic Centre, OttoWagnerSpital, Sanatoriumstrass 2, A-1140 Wien, Austria
| | - J. B. Stiehl
- St. Mary’s Hospital, Centralia Illinois, 4573, CJ Heck Road, Salem, Illinois 62881, USA
| | - H. Knechtel
- Orthopaedic Centre, OttoWagnerSpital, Sanatoriumstrass 2, A-1140 Wien, Austria
| | - G. Titzer-Hochmaier
- Orthopaedic Centre, OttoWagnerSpital, Sanatoriumstrass 2, A-1140 Wien, Austria
| | - W. Schwagerl
- Orthopaedic Centre, OttoWagnerSpital, Sanatoriumstrass 2, A-1140 Wien, Austria
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31
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Laflamme GY, Alami GB, Zhim F. Cement as a locking mechanism for screw heads in acetabular revision shells - a biomechanical analysis. Hip Int 2009; 18:29-34. [PMID: 18645971 DOI: 10.1177/112070000801800106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In acetabular revisions, polyethylene (PE) liners are often cemented into metal shells on top of acetabular screw heads. This study investigates the possibility of using this technique to obtain fixed-angle acetabular screws Eth a concept that has not yet been reported in the literature. Two groups of screws (n=8) were inserted into Trabecular Metal revision shells (Zimmer), into which PE liners were then cemented. Screws in Group 1, inserted in the shell's pre-fabricated holes, were countersunk, whereas screws in Group 2 were inserted in custom-drilled holes that make their heads protrude into, and interdigitate with, the overlying cement mantle. Perpendicular loading was then applied to the screw shafts both statically to failure and cyclically. A greater stiffness was observed for the protruding screws upon static loading; and while the countersunk screws all failed at the screw-cement junction (53.44 + or - 8.33 N), the protruding screws all failed at the screw shaft (1049.79 + or - 32.12 N) a 20-fold difference (p< 0.05). Under cyclic loading, only the protruding screw head specimen did not fail, undergoing an overall displacement within the limits of osseointegration.These results support the hypothesis that the protrusion of an acetabular screw head into an overlying cement mantle significantly increases its angular stability. Provided other variables are favorable, this locking effect may increase the initial stability of the whole implant, thus improving the ultimate success of complex acetabular revisions.
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Affiliation(s)
- G Y Laflamme
- Programme d'Orthopedie Edouard Samson (POES), University of Montreal, Montreal, Quebec, Canada
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32
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Laursen MB, Nielsen PT, Søballe K. Bone remodelling around HA-coated acetabular cups : a DEXA study with a 3-year follow-up in a randomised trial. INTERNATIONAL ORTHOPAEDICS 2006; 31:199-204. [PMID: 16761153 PMCID: PMC2267561 DOI: 10.1007/s00264-006-0148-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2005] [Revised: 02/23/2006] [Accepted: 03/13/2006] [Indexed: 10/24/2022]
Abstract
This study was designed to investigate bone remodelling around the cup in cementless THA. Previous studies indicate an advantage of better sealing of the bone-prosthesis interface by HA/TCP coating of implants, inhibiting polyethylene-induced osteolysis. One hundred patients gave informed consent to participate in a controlled randomized study between porous coated Trilogy versus Trilogy Calcicoat (HA/TCP coated). The cup was inserted in press-fit fixation. The femoral component was a cementless porous coated titanium alloy stem (Bi-Metric), with a modular 28-mm CrCo head. The Harris Hip Score (HHS) and bone mineral density (BMD) determined by DEXA scanning were used to study the effect. Measurements revealed no difference between the two groups after 3 years either in the clinical outcome or in terms of periprosthetic bone density. Patients with a body mass index above normal regained more bone mineral than patients with normal weight. This finding supports the assumption that load is beneficial to bone remodelling.
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Affiliation(s)
- M B Laursen
- Department of Hip and Knee Arthroplasty Northern Ortopaedic Division, Aarhus University Hospital, Sdr. Skovvej 11, 9000 Aalborg, Denmark.
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