Overview
Left hip joint seronegative rheumatoid arthritis (SNRA) is a form of inflammatory arthritis characterized by joint inflammation and damage in the absence of rheumatoid factor (RF) positivity. This condition primarily affects individuals with autoimmune manifestations that do not meet traditional RF criteria for rheumatoid arthritis (RA). SNRA can lead to significant functional impairment and pain, impacting quality of life significantly. It predominantly affects middle-aged to older adults but can occur across various age groups. Early recognition and intervention are crucial in day-to-day practice to prevent joint destruction and maintain mobility, underscoring the importance of accurate diagnosis and tailored management strategies 14.Pathophysiology
The pathophysiology of left hip joint SNRA involves chronic inflammation driven by an autoimmune response, albeit without the typical RF positivity seen in classical RA. The immune system mistakenly attacks the synovium, leading to synovitis, which over time results in cartilage and bone erosion. This process is mediated by cytokines such as TNF-α, IL-1, and IL-6, which promote an inflammatory cascade. Despite the absence of RF, other autoantibodies like anti-citrullinated protein antibodies (ACPA) may be present in some cases, contributing to the inflammatory milieu. The lack of RF positivity complicates early diagnosis, as clinicians must rely on clinical symptoms, imaging findings, and other serological markers to confirm the diagnosis 48.Epidemiology
The exact incidence and prevalence of SNRA specifically localized to the left hip are not well-documented in the provided sources, making it challenging to provide precise figures. However, SNRA is recognized as a subset of RA, which affects approximately 0.5% to 1% of the global population 4. SNRA tends to affect individuals similarly to RA, with a slight female predominance and a median age of onset around 50-60 years. Geographic distribution and specific risk factors are not distinctly delineated in the literature provided, though genetic predispositions and environmental factors likely play roles similar to those in RA 411.Clinical Presentation
Patients with left hip joint SNRA typically present with insidious onset of hip pain, stiffness, and reduced range of motion, often worse in the morning or after periods of inactivity. Common symptoms include:Red-flag features that warrant urgent evaluation include rapid joint destruction, unexplained weight loss, and signs of systemic involvement such as vasculitis or nodules. These features help differentiate SNRA from other inflammatory conditions and necessitate a thorough diagnostic workup 48.
Diagnosis
The diagnosis of left hip joint SNRA involves a combination of clinical assessment, laboratory tests, and imaging studies. Key diagnostic steps include:Management
First-Line Treatment
Second-Line Treatment
Refractory Cases / Specialist Escalation
Complications
Prognosis & Follow-Up
The prognosis for patients with SNRA varies based on early intervention and adherence to treatment. Prognostic indicators include:Special Populations
Key Recommendations
References
Showing 100 priority papers (full text preferred, most recent first) of 110 indexed.
1 Cho CH, Abrahams JM, Sharma DK, Solomon LB, Wall CJ, Pijls BG et al.. Association of acetabular implants with sensitive radiographic surveillance on revision rates: a study based on 5 hip arthroplasty registries. Acta orthopaedica 2026. link 2 Polus JS, Kaptein BL, Vasarhelyi EM, Lanting BA, Teeter MG. Evaluation of conventional and CT-based radiostereometric analysis for inducible displacement measurements after total hip arthroplasty. Journal of orthopaedic research : official publication of the Orthopaedic Research Society 2025. link 3 Lu H, Sun H, Xiao Q, Xu H, Zhou Q, Li L et al.. Perioperative safety and efficacy of robot-assisted total hip arthroplasty in ERAS-managed patients: a pilot study. Journal of orthopaedic surgery and research 2023. link 4 Mikkelsen RT, Overgaard S, Pedersen AB, Kärrholm J, Rolfson O, Fenstad AM et al.. Does choice of bearings influence the survival of cementless total hip arthroplasty in patients aged 20-55 years? Comparison of 21,594 patients reported to the Nordic Arthroplasty Register Association dataset 2005-2017. Acta orthopaedica 2023. link 5 Huang Y, Yang Q, Wang Z, Pan Z, Zhang Y, Shi Z et al.. Comparisons of in-hospital complications between total hip arthroplasty and hip resurfacing arthroplasty. BMC musculoskeletal disorders 2023. link 6 Tian R, Duan X, Kong N, Wang K, Yang P. Precise acetabular positioning, discrepancy in leg length, and hip offset using a new seven-axis robot-assisted total hip arthroplasty system requires no learning curve: a retrospective study. Journal of orthopaedic surgery and research 2023. link 7 Palazzuolo M, Antoniadis A, Delaune L, Tornare I, Wegrzyn J. Comparison of the long-term cause of failure and survivorship of four hundred and twenty seven metal-on-metal hip arthroplasties: resurfacing versus large head total hip arthroplasty. International orthopaedics 2021. link 8 Long G, Chao C, Ming-Sheng T, Ping Y. Low Grip Strength Associated with Clinical Outcomes after Total Hip Arthroplasty - A Prospective Case-Control Study. Orthopaedic surgery 2021. link 9 Wilcock AD, Barnett ML, McWilliams JM, Grabowski DC, Mehrotra A. Hospital Responses to Incentives in Episode-Based Payment for Joint Surgery: A Controlled Population-Based Study. JAMA internal medicine 2021. link 10 Kjærgaard K, Ding M, Jensen C, Bragdon C, Malchau H, Andreasen CM et al.. Vitamin E-doped total hip arthroplasty liners show similar head penetration to highly cross-linked polyethylene at five years: a multi-arm randomized controlled trial. The bone & joint journal 2020. link 11 Kim H, Meath THA, Tran FW, Quiñones AR, McConnell KJ, Ibrahim SA. Association of Medicare Mandatory Bundled Payment System for Hip and Knee Joint Replacement With Racial/Ethnic Difference in Joint Replacement Care. JAMA network open 2020. link 12 Eneqvist T, Nemes S, Kärrholm J, Burström K, Rolfson O. How do EQ-5D-3L and EQ-5D-5L compare in a Swedish total hip replacement population?. Acta orthopaedica 2020. link 13 Brodén C, Sandberg O, Sköldenberg O, Stigbrand H, Hänni M, Giles JW et al.. Low-dose CT-based implant motion analysis is a precise tool for early migration measurements of hip cups: a clinical study of 24 patients. Acta orthopaedica 2020. link 14 Wang HY, Zhang Md R, Luo ZY, Wang Md PhD D, Pei FX, Tang X et al.. One-Stage Arthroplasty or Revision for Seronegative Infections in Hip and Knee. Orthopaedic surgery 2020. link 15 Durand-Hill M, Henckel J, Burwell M, Skinner J, Hart A. Detection of incorrect manufacturer labelling of hip components. Skeletal radiology 2017. link 16 Delaunay CP, Putman S, Puliéro B, Bégin M, Migaud H, Bonnomet F. Cementless Total Hip Arthroplasty With Metasul Bearings Provides Good Results in Active Young Patients: A Concise Followup. Clinical orthopaedics and related research 2016. link 17 Paukkeri EL, Korhonen R, Hämäläinen M, Pesu M, Eskelinen A, Moilanen T et al.. The Inflammatory Phenotype in Failed Metal-On-Metal Hip Arthroplasty Correlates with Blood Metal Concentrations. PloS one 2016. link 18 Sköldenberg O, Rysinska A, Eisler T, Salemyr M, Bodén H, Muren O. Denosumab for treating periprosthetic osteolysis; study protocol for a randomized, double-blind, placebo-controlled trial. BMC musculoskeletal disorders 2016. link 19 Waldstein W, Schmidt-Braekling T, Boettner F. MRI does not detect acetabular osteolysis around metal-on-metal Birmingham THA. Archives of orthopaedic and trauma surgery 2014. link 20 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 orthopaedica 2012. link 21 Maurer-Ertl W, Friesenbichler J, Sadoghi P, Pechmann M, Trennheuser M, Leithner A. Metal ion levels in large-diameter total hip and resurfacing hip arthroplasty--preliminary results of a prospective five year study after two years of follow-up. BMC musculoskeletal disorders 2012. link 22 Krause M, Breer S, Hahn M, Rüther W, Morlock MM, Amling M et al.. Cementation and interface analysis of early failure cases after hip-resurfacing arthroplasty. International orthopaedics 2012. link 23 Lindalen E, Havelin LI, Nordsletten L, Dybvik E, Fenstad AM, Hallan G et al.. Is reverse hybrid hip replacement the solution?. Acta orthopaedica 2011. link 24 Moroni A, Savarino L, Hoque M, Cadossi M, Baldini N. Do ion levels in hip resurfacing differ from metal-on-metal THA at midterm?. Clinical orthopaedics and related research 2011. link 25 Shi HY, Chang JK, Wong CY, Wang JW, Tu YK, Chiu HC et al.. Responsiveness and minimal important differences after revision total hip arthroplasty. BMC musculoskeletal disorders 2010. link 26 Bascarevic Z, Vukasinovic Z, Slavkovic N, Dulic B, Trajkovic G, Bascarevic V et al.. Alumina-on-alumina ceramic versus metal-on-highly cross-linked polyethylene bearings in total hip arthroplasty: a comparative study. International orthopaedics 2010. link 27 Minetto MA, Oprandi G, Saba L, Mussino S, Aprato A, Massè A et al.. Serum interleukin-6 response to elective total hip replacement surgery. International orthopaedics 2006. link 28 Miller JE, Haq II, Hedge E, Saunders P, Farhan-Alanie MM, Hee SW et al.. The SKY is the limit - a novel system for interpreting radiolucent lines around CORAIL uncemented total hip arthroplasty stems: a proof-of-concept study. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2025. link 29 Shanaa J, Asad S, Mitchell W, Oda M, Pathak A, Marwin S. Increased Operative Time yet Enhanced Accuracy in Computer-Assisted vs. Mechanical Hip Resurfacing Arthroplasty: An Updated Systematic Review and Meta-Analysis. JBJS reviews 2025. link 30 Lizcano JD, Abe EA, Tarabichi S, Magnuson JA, Mu W, Courtney PM. Health Disparities in Aseptic Revision Total Hip Arthroplasty: Assessing the Impact of Social Determinants of Health. The Journal of arthroplasty 2025. link 31 DeClercq MG, Keeley JH, Runner RP, Weisz KM, Cavinatto LM, Whaley JD et al.. Associated Risk of Medicaid and Medicare Payer Status on Outcomes Following Total Joint Arthroplasty: A 10-Year Report. The Journal of arthroplasty 2025. link 32 Homma Y, Tashiro K, Okuno R, Unoki M, Murakami Y, Watari T et al.. Weak hammering sounds are associated with postoperative subsidence in cementless total hip arthroplasty. International orthopaedics 2025. link 33 McCormick KL, Mastroianni MA, Kolodychuk NL, Herndon CL, Shah RP, Cooper HJ et al.. Complications and Survivorship After Aseptic Revision Total Hip Arthroplasty: Is There a Difference by Surgical Approach?. The Journal of arthroplasty 2025. link 34 Alemayehu G, Jones B, Slack K, Jabbouri SS, Greene R, Roux R et al.. Racial Disparities in Total Knee and Hip Arthroplasty in a Medically Underserved Community with a Diverse Population. Journal of racial and ethnic health disparities 2025. link 35 Jones IA, Wier J, Chen MS, Liu KC, Palmer R, Mayfield CK et al.. Complete Blood Count Ratios Predict Adverse Events After Total Joint Arthroplasty. The Journal of the American Academy of Orthopaedic Surgeons 2024. link 36 Hoggett L, Havenhand T, Helm A. Bone cement in total hip arthroplasty - Is it really green?. The surgeon : journal of the Royal Colleges of Surgeons of Edinburgh and Ireland 2024. link 37 Chang KC, Hershfeld BE, White PB, Cohn RM, Mont MA, Bitterman AD. Knee'd to Know Basis: Informed Consent in Total Hip and Knee Arthroplasty. The Journal of arthroplasty 2024. link 38 Magnuson JA, Hobbs J, Yakkanti R, Gold PA, Courtney PM, Krueger CA. Lower Revenue Surplus in Medicare Advantage Versus Private Commercial Insurance for Total Joint Arthroplasty: An Analysis of a Single Payor Source at One Institution. The Journal of arthroplasty 2024. link 39 Lu Y, Salmons HI, Mickley JP, Bedard NA, Taunton MJ, Wyles CC. Defining Clinically Meaningful Subgroups for Risk Stratification in Patients Undergoing Revision Total Hip Arthroplasty: A Combined Unsupervised and Supervised Machine Learning Approach. The Journal of arthroplasty 2023. link 40 Dhanjani SA, Schmerler J, Wenzel A, Gomez G, Oni J, Hegde V. Racial and Socioeconomic Disparities in Risk and Reason for Revision in Total Joint Arthroplasty. The Journal of the American Academy of Orthopaedic Surgeons 2023. link 41 Alshammari MO, de Petrillo G, Epure LM, Huk OL, Zukor DJ, Antoniou J. Outcomes of Ceramic-On-Ceramic Bearing Total Hip Arthroplasty: A Minimum 10-Year Follow-Up Study. The Journal of arthroplasty 2023. link 42 Sarpong NO, Kaidi AC, Syku M, Mensah C, Blevins JL, Chalmers BP. Survivorship and Risk Factors for Re-Revision after Aseptic Revision Total Hip Arthroplasty in Patients Aged ≤55 Years. The Journal of arthroplasty 2022. link 43 Farhan-Alanie OMH, Hrycaiczuk A, Tinning C, Jones B, Stark A, Bryceland K. Alumina ceramic-on-ceramic hybrid total hip arthroplasty. A median of 15 years follow-up. European journal of orthopaedic surgery & traumatology : orthopedie traumatologie 2022. link 44 Osmanski-Zenk K, Klinder A, Ellenrieder M, Darowski M, Goosmann M, Mittelmeier W. Identification of Potential High-Risk Patients on the Basis of PROMs in a Certified Centre for Joint Replacement (EndoProthetikZentrum) Using the Example of Hip Arthroplasty. Zeitschrift fur Orthopadie und Unfallchirurgie 2022. link 45 van der Weegen W, Hoekstra H, Brakel K, Sijbesma T. Limited need for screening of metal-on-metal hip resurfacing patients beyond 10 years of follow-up. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2022. link 46 Robinson PG, MacDonald DJ, Macpherson GJ, Patton JT, Clement ND. Changes and thresholds in the Forgotten Joint Score after total hip arthroplasty : minimal clinically important difference, minimal important and detectable changes, and patient-acceptable symptom state. The bone & joint journal 2021. link 47 Takaoka Y, Goto K, Tamura J, Okuzu Y, Kawai T, Kuroda Y et al.. Radiolucent lines do not affect the longevity of highly cross-linked polyethylene cemented components in total hip arthroplasty. The bone & joint journal 2021. link 48 Aali-Rezaie A, Kuo FC, Kozaily E, Vahedi H, Parvizi J, Sharkey PF. Red Cell Distribution Width: Commonly Performed Test Predicts Mortality in Primary Total Joint Arthroplasty. The Journal of arthroplasty 2021. link 49 Koper MC, Hesseling B, Tuinebreijer WE, van der Linden H, Mathijssen NMC. Safe Upper Limits of Serum Cobalt and Chromium Levels for a Metal-on-Metal Total Hip Bearing: A 10-Year Follow-Up Study. The Journal of arthroplasty 2021. link 50 Keohane D, Sheridan GA, Harty J. Perioperative dexamethasone administration reduces 'on-demand' opioid requirements in bilateral total hip arthroplasty. Irish journal of medical science 2021. link 51 Emara AK, Peterson J, Piuzzi NS, Klika A, Rajaravivarma R, Higuera-Rueda C et al.. Effect of liner offset and inclination on cement retention strength of metal-in-metal acetabular constructs: A biomechanical study. Journal of orthopaedic research : official publication of the Orthopaedic Research Society 2021. link 52 Smeekes C, Ongkiehong BF, van der Wal BC, Wolterbeek R, Henseler JF, Nelissen RG. Inclination but not anatomical reconstruction is related with higher cobalt levels in MoM hip arthroplasty. Acta orthopaedica Belgica 2018. link 53 Ando W, Yasui H, Yamamoto K, Oinuma K, Tokunaga H, Inaba Y et al.. A comparison of the effect of large and small metal-on-metal bearings in total hip arthroplasty on metal ion levels and the incidence of pseudotumour: a five-year follow-up of a previous report. The bone & joint journal 2018. link 54 Matuszak SJ, Galea VP, Connelly JW, Christiansen J, Muratoglu O, Malchau H. Periprosthetic acetabular radiolucency progression in mid-term follow-up of the articular surface replacement hip system. Archives of orthopaedic and trauma surgery 2018. link 55 Klouche S, Giesinger JM, Sariali EH. Translation, cross-cultural adaption and validation of the French version of the Forgotten Joint Score in total hip arthroplasty. Orthopaedics & traumatology, surgery & research : OTSR 2018. link 56 Lakomkin N, Goz V, Lajam CM, Iorio R, Bosco JA. Higher Modified Charlson Index Scores Are Associated With Increased Incidence of Complications, Transfusion Events, and Length of Stay Following Revision Hip Arthroplasty. The Journal of arthroplasty 2017. link 57 Yeoman TF, Smy W, Gaston P. A case control study of cemented acetabular total hip arthroplasty components in patients less than 50 with 5-year minimum follow-up. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2017. link 58 Haraguchi A, Nakashima Y, Miyahara H, Esaki Y, Okazaki K, Fukushi JI et al.. Minimum 10-year results of cementless total hip arthroplasty in patients with rheumatoid arthritis. Modern rheumatology 2017. link 59 Kirkwood G, Pollock AM. Patient choice and private provision decreased public provision and increased inequalities in Scotland: a case study of elective hip arthroplasty. Journal of public health (Oxford, England) 2017. link 60 Inacio MCS, Pratt NL, Roughead EE, Graves SE. Evaluation of three co-morbidity measures to predict mortality in patients undergoing total joint arthroplasty. Osteoarthritis and cartilage 2016. link 61 Fujita K, Makimoto K, Mawatari M. Three-year follow-up study of health related QOL and lifestyle indicators for Japanese patients after total hip arthroplasty. Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association 2016. link 62 Bobman JT, Danoff JR, Babatunde OM, Zhu K, Peyser K, Geller JA et al.. Total Hip Arthroplasty Functional Outcomes Are Independent of Acetabular Component Orientation When a Polyethylene Liner Is Used. The Journal of arthroplasty 2016. link 63 Troelsen A, Greene ME, Ayers DC, Bragdon CR, Malchau H. A Novel Method for Assessment of Polyethylene Liner Wear in Radiopaque Tantalum Acetabular Cups: Clinical Validation in Patients Enrolled in a Randomized Controlled Trial. The Journal of arthroplasty 2015. link 64 Börnert S, Lützner J, Beyer F, Günther KP, Hartmann A. Revision Rate and Patient-Reported Outcome After Hip Resurfacing Arthroplasty: A Concise Follow-Up of 1064 Cases. The Journal of arthroplasty 2015. link 65 Warth LC, Callaghan JJ, Liu SS, Klaassen AL, Goetz DD, Johnston RC. Thirty-five-year results after Charnley total hip arthroplasty in patients less than fifty years old. A concise follow-up of previous reports. The Journal of bone and joint surgery. American volume 2014. link 66 Ng ZD, Krishna L. Cemented versus cementless hemiarthroplasty for femoral neck fractures in the elderly. Journal of orthopaedic surgery (Hong Kong) 2014. link 67 Lübbeke A, Rothman KJ, Garavaglia G, Barea C, Christofilopoulos P, Stern R et al.. Strong association between smoking and the risk of revision in a cohort study of patients with metal-on-metal total hip arthroplasty. Journal of orthopaedic research : official publication of the Orthopaedic Research Society 2014. link 68 Lass R, Grübl A, Kolb A, Domayer S, Csuk C, Kubista B et al.. Primary cementless total hip arthroplasty with second-generation metal-on-metal bearings: a concise follow-up, at a minimum of seventeen years, of a previous report. The Journal of bone and joint surgery. American volume 2014. link 69 Mäkelä KT, Matilainen M, Pulkkinen P, Fenstad AM, Havelin L, Engesaeter L et al.. Failure rate of cemented and uncemented total hip replacements: register study of combined Nordic database of four nations. BMJ (Clinical research ed.) 2014. link 70 Bouras T, Repantis T, Fennema P, Korovessis P. Low aseptic loosening and revision rate in Zweymüller-Plus total hip arthroplasty with ceramic-on-ceramic bearings. European journal of orthopaedic surgery & traumatology : orthopedie traumatologie 2014. link 71 Pelt CE, Erickson J, Clarke I, Donaldson T, Layfield L, Peters CL. Histologic, serologic, and tribologic findings in failed metal-on-metal total hip arthroplasty: AAOS exhibit selection. The Journal of bone and joint surgery. American volume 2013. link 72 Vendittoli PA, Rivière C, Lavigne M, Lavoie P, Alghamdi A, Duval N. Alumina on alumina versus metal on conventional polyethylene: a randomized clinical trial with 9 to 15 years follow-up. Acta orthopaedica Belgica 2013. link 73 Ray R, Goudie EB, Jenkins P, Gaston P. Resurfacing hip replacement and cemented total hip replacement have equivalent outcome at one year in a disease matched population: a case-control study of patient reported outcome measures. Hip international : the journal of clinical and experimental research on hip pathology and therapy 2013. link 74 Wu HB, Cai YZ, Xin ZF, Wang XH, Yan SG. Pure alumina bearings with cementless stems versus sandwich bearings with cemented stems in total hip arthroplasty. Chinese medical journal 2012. link 75 Yeung E, Bott PT, Chana R, Jackson MP, Holloway I, Walter WL et al.. Mid-term results of third-generation alumina-on-alumina ceramic bearings in cementless total hip arthroplasty: a ten-year minimum follow-up. The Journal of bone and joint surgery. American volume 2012. link 76 Geng D, Mao H, Wang J, Zhu X, Huang C, Chen L et al.. Protective effects of COX-2 inhibitor on titanium-particle-induced inflammatory osteolysis via the down-regulation of RANK/RANKL. Acta biomaterialia 2011. link 77 Migaud H, Putman S, Krantz N, Vasseur L, Girard J. Cementless metal-on-metal versus ceramic-on-polyethylene hip arthroplasty in patients less than fifty years of age: a comparative study with twelve to fourteen-year follow-up. The Journal of bone and joint surgery. American volume 2011. link 78 Johnston LR, Clift BA, Abboud RJ. Bilateral simultaneous hip replacement versus bilateral sequential hip replacement. A 7-year data review. Orthopedic nursing 2011. link 79 Corten K, Ganz R, Simon JP, Leunig M. Hip resurfacing arthroplasty: current status and future perspectives. European cells & materials 2011. link 80 van der Weegen W, Hoekstra HJ, Sijbesma T, Bos E, Schemitsch EH, Poolman RW. Survival of metal-on-metal hip resurfacing arthroplasty: a systematic review of the literature. The Journal of bone and joint surgery. British volume 2011. link 81 Wroblewski BM, Purbach B, Siney PD, Fleming PA. Charnley low-friction arthroplasty in teenage patients: the ultimate challenge. The Journal of bone and joint surgery. British volume 2010. link 82 Petsatodis GE, Papadopoulos PP, Papavasiliou KA, Hatzokos IG, Agathangelidis FG, Christodoulou AG. Primary cementless total hip arthroplasty with an alumina ceramic-on-ceramic bearing: results after a minimum of twenty years of follow-up. The Journal of bone and joint surgery. American volume 2010. link 83 Schmalzried TP. Metal-metal bearing surfaces in hip arthroplasty. Orthopedics 2009. link 84 Nantel J, Termoz N, Ganapathi M, Vendittoli PA, Lavigne M, Prince F. Postural balance during quiet standing in patients with total hip arthroplasty with large diameter femoral head and surface replacement arthroplasty. Archives of physical medicine and rehabilitation 2009. link 85 Kandel L, Rivkin G, Friedman A, Segal D, Liebergall M, Mattan Y. Polyethylene liner cementation technique in asymptomatic versus symptomatic osteolysis. Orthopedics 2009. link 86 Della Valle CJ, Mesko NW, Quigley L, Rosenberg AG, Jacobs JJ, Galante JO. Primary total hip arthroplasty with a porous-coated acetabular component. A concise follow-up, at a minimum of twenty years, of previous reports. The Journal of bone and joint surgery. American volume 2009. link 87 Malizos K, Roidis NT, Poultsides L, Basdekis G, Moraitis T, Xenakis T. Protrusio of a ceramic femoral head through the acetabular metallic shell, extensive metallosis and 'bubble sign'. Orthopedics 2009. link 88 Marulanda GA, Wilson MS, Edwards P, Raterman S. Early clinical experience with the use of the Birmingham hip resurfacing system. Orthopedics 2008. link 89 Stulberg BN, Trier KK, Naughton M, Zadzilka JD. Results and lessons learned from a United States hip resurfacing investigational device exemption trial. The Journal of bone and joint surgery. American volume 2008. link 90 Rowley DL, Jenkins BC, Frazier E. Utilization of joint arthroplasty: racial and ethnic disparities in the Veterans Affairs Health Care System. The Journal of the American Academy of Orthopaedic Surgeons 2007. link 91 Petersen MK, Andersen KV, Andersen NT, Søballe K. "To whom do the results of this trial apply?" External validity of a randomized controlled trial involving 130 patients scheduled for primary total hip replacement. Acta orthopaedica 2007. link 92 Schmalzried TP. How I choose a bearing surface for my patients. The Journal of arthroplasty 2004. link 93 Migaud H, Jobin A, Chantelot C, Giraud F, Laffargue P, Duquennoy A. Cementless metal-on-metal hip arthroplasty in patients less than 50 years of age: comparison with a matched control group using ceramic-on-polyethylene after a minimum 5-year follow-up. The Journal of arthroplasty 2004. link 94 Lombardi AV, Mallory TH, Cuckler JM, Williams J, Berend KR, Smith TM. Mid-term results of a polyethylene-free metal-on-metal articulation. The Journal of arthroplasty 2004. link 95 Röder C, Parvizi J, Eggli S, Berry DJ, Müller ME, Busato A. Demographic factors affecting long-term outcome of total hip arthroplasty. Clinical orthopaedics and related research 2003. link 96 Clarke MT, Lee PT, Arora A, Villar RN. Levels of metal ions after small- and large-diameter metal-on-metal hip arthroplasty. The Journal of bone and joint surgery. British volume 2003. link 97 Puskas BL, Menke NE, Huie P, Song Y, Ecklund K, Trindade MC et al.. Expression of nitric oxide, peroxynitrite, and apoptosis in loose total hip replacements. Journal of biomedical materials research. Part A 2003. link 98 Takayanagi S, Nagase M, Shimizu T, Kobayashi T, Shirakura K, Takagishi K. Human leukocyte antigen and aseptic loosening in Charnley total hip arthroplasty. Clinical orthopaedics and related research 2003. link 99 Ornstein E, Franzén H, Johnsson R, Stefánsdóttir A, Sundberg M, Tägil M. Hip revision with impacted morselized allografts: unrestricted weight-bearing and restricted weight-bearing have similar effect on migration. A radiostereometry analysis. Archives of orthopaedic and trauma surgery 2003. link 100 Lavigne P, Shi Q, Jolicoeur FC, Pelletier JP, Martel-Pelletier J, Fernandes JC. Modulation of IL-1beta, IL-6, TNF-alpha and PGE(2) by pharmacological agents in explants of membranes from failed total hip replacement. Osteoarthritis and cartilage 2002. link