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Antoniadis A, Wegrzyn J. Direct Cementation of Dual Mobility Cups Into the Bony Acetabulum in Primary Total Hip Arthroplasty: Clinical and Radiographic Outcomes at a Minimum 5-Year Follow-Up. J Arthroplasty 2022; 38:1120-1125. [PMID: 36566998 DOI: 10.1016/j.arth.2022.12.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 12/14/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Cemented dual mobility cups (DMCs) are commonly used in combination with acetabular reinforcement devices. Indeed, according to literature, direct cementation of metal-backed acetabular components into the bony acetabulum remains controversial as this technique is potentially associated with increased rates of aseptic loosening. Therefore, this study aimed to evaluate the clinical and radiographic outcomes of DMC cemented into the bony acetabulum in primary total hip arthroplasty (THA). METHODS A total of 49 THA (48 patients, mean age 78 years [range, 51 to 91]) performed with direct cementation of a DMC into the bony acetabulum were prospectively included in our total joint registry and retrospectively reviewed. The clinical outcome was assessed using the Harris hip score (HHS). The radiographic outcome included measurement of component positioning and occurrence and progression of demarcation around the cemented DMC. Complications were reported with a particular attention to cemented fixation failure and aseptic loosening. RESULTS At a 7-year mean follow-up (range, 5 to 8), the pre-to postoperative HHS improved from 47 (range, 30 to 58) to 92 points (range, 80 to 98) (P < .01). Nonprogressive and focalized demarcations were observed in 7 THA (14%). Importantly, no progressive demarcation or DMC aseptic loosening was observed. CONCLUSION Direct cementation of DMC into the bony acetabulum ensured a stable fixation with no progressive demarcation or aseptic loosening at midterm follow-up. Therefore, this technique can be selectively considered in primary THA, especially in elderly or frail patients to avoid potential mechanical failure of press-fit fixation due to altered bone quality or additional morbidity related to the use of acetabular reinforcement devices.
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Affiliation(s)
- Alexander Antoniadis
- Department of Orthopaedic Surgery, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Julien Wegrzyn
- Department of Orthopaedic Surgery, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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No Change in Serum Metal Ions Levels After Primary Total Hip Replacement With an Additively Manufactured Dual Mobility Acetabular Construct. Arthroplast Today 2022; 17:132-135. [PMID: 36091082 PMCID: PMC9449544 DOI: 10.1016/j.artd.2022.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 05/27/2022] [Accepted: 07/27/2022] [Indexed: 11/21/2022] Open
Abstract
Background Modular junctions of mixed metals have been associated with fretting and corrosion, and in extreme circumstances, adverse local tissue reactions. Since modular dual mobility (MDM) hip constructs involve a titanium shell with a modular cobalt-chromium liner, the aim of this study was to evaluate serum metal ions at minimum 1 year following total hip arthroplasty (THA) in a cohort of patients with these types of implants. Methods A single surgeon enrolled 30 patients in a prospective study in which all patients were evaluated preoperatively with serum cobalt, chromium, and titanium metal ion levels. Patients underwent primary THA with an additively manufactured titanium acetabular shell, MDM cobalt-chromium liner, titanium cementless stem, and ceramic head. A “Four Quadrant Test” was used to ensure proper liner seating intraoperatively. At minimum 1 year following surgery, clinical and radiographic evaluation was conducted, and repeat metal ion levels were collected. Patient-reported outcome measures were collected preoperatively and postoperatively. Results Twenty-five patients completed 1-year follow-up. All patients had normal metal ion levels for cobalt (<1 μg/L), chromium (<5 μg/L), and titanium (sensitivity test) preoperatively and postoperatively. Patient-reported outcome measures improved significantly after primary THA: Veterans RAND-12 Physical Component Score (31.05 to 45.02, P < .001), Visual Analogue Scale Pain score (70.68 to 7.77, P < .001), Hip Disability and Osteoarthritis Outcomes Score, Joint Replacement (51.99 to 86.97, P < .001). Conclusions No significant elevation was detected in serum metal ion levels 16 months following THA using an additively manufactured titanium acetabular shell, a cobalt-chromium MDM liner, and titanium stem with a ceramic head.
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Baker CM, Restrepo C, Hozack WJ. Minimum Five-Year Outcomes of Modular Dual Mobility in Primary Total Hip Arthroplasty. J Arthroplasty 2022; 37:S566-S570. [PMID: 35271978 DOI: 10.1016/j.arth.2022.02.118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/23/2022] [Accepted: 02/28/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Using a modular dual-mobility (MDM) bearing in primary total hip arthroplasty (THA) has not been widely evaluated. The purpose of this study is to evaluate clinical outcomes and survivorship following MDM bearings in primary THA. METHODS We used our registry database for patients with an MDM bearing on primary THA, performed by 6 surgeons through supine direct lateral or direct anterior approach. MDM bearings were used most often when impingement or subluxation was present intraoperatively despite proper component position. Another indication was a patient with planned activities who might be at a higher risk of instability postoperatively. RESULTS A total of 127 MDM bearings were used in primary THA in 119 patients. Mean follow-up was 6.77 years (range 5-8.9). Five hips were revised, none of which were due to MDM bearing failure. Preoperative Hip dysfunction and Osteoarthritis Outcome Score for Joint Replacement, Veterans RAND/Short Form 12 Physical Health Score and Mental Health Score increased from 25.81 to 52.40 (P < .0001), 30.42 to 44.50 (P < .0001), and 36.21 to 52.70 (P < .0001) at latest completed survey follow-up, respectively. CONCLUSION This MDM bearing shows excellent functional outcomes at a minimum 5 years of follow-up with no bearing-related failures. It can be an excellent choice in primary THA specifically in females where the use of increased head size to prevent instability is not possible due to anatomical restrictions and liner thickness.
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Affiliation(s)
- Colin M Baker
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA
| | - Camilo Restrepo
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA
| | - William J Hozack
- Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA
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4
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Epinette JA, Coulomb R, Pradel S, Kouyoumdjian P. Do Modular Dual Mobility Cups Offer a Reliable Benefit? Minimum 5-Year Follow-Up of 102 Cups. J Arthroplasty 2022; 37:910-916. [PMID: 35065216 DOI: 10.1016/j.arth.2022.01.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Among various options suggested to prevent hip instability after total hip replacement, the MDM-tritanium (modular dual mobility) cup features a cobalt-chrome liner (CoCr) positioned in a titanium acetabular shell and matched with a mobile insert in highly cross-linked annealed X3 polyethylene. The purpose of this study aimed to confirm whether there was no significant release of ions (Co and Cr) or higher occurrence of dislocation or even cases of aseptic loosening of the cementless shell with the use of MDM-tritanium cups at minimum of 5-year follow-up. METHODS The clinical study was carried out on a homogeneous consecutive and nonselective series with 102 MDM cups (98 patients) implanted in 2 centers. This MDM-tritanium cup had been systematically used for surgical revisions (70% of cases) or for patients with major hip dysplasia or in elderly patients with poor bone quality. A biological assessment of ion releases has been performed in a specific cohort of 39 cases that had an internal ceramic head. RESULTS None of the following complications was observed: no case of immunoallergic event, no aseptic loosening, and the dislocation rate was 4.9% involving only the difficult primary and revision cases. The clinical results were encouraging, with 89.7 points for Harris Hip Score, 41.16 points/48 for the OHS-12. The Agora Roentgenographic Assessment (ARA) radiologic score was graded "excellent" in 94.4%. The MDM-tritanium survivorship with revision for any cause in 102 cups at 7.95 years was 92.7%. CONCLUSION Based on the results of our first 102 cases, there were no immunoallergic complications-contrary to what was initially feared with the CoCr bearing-titanium pair-and no postoperative instability, including for complex primary and revisions total hip replacements. LEVEL OF EVIDENCE Individual Cohort Study: 2B.
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Affiliation(s)
| | - Remy Coulomb
- Department of Orthopaedic Surgery, University Hospital of Nîmes, Nîmes, France
| | - Sarah Pradel
- Department of Orthopaedic Surgery, University Hospital of Nîmes, Nîmes, France
| | - Pascal Kouyoumdjian
- Department of Orthopaedic Surgery, University Hospital of Nîmes, Nîmes, France; Laboratory of Mechanics and Civil Engineering (LMGC), CNRS-UM1, Montpellier, France
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5
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Hip stability parameters with dual mobility, modular dual mobility and fixed bearing in total hip arthroplasty: an analytical evaluation. BMC Musculoskelet Disord 2022; 23:373. [PMID: 35443656 PMCID: PMC9022332 DOI: 10.1186/s12891-022-05280-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 03/30/2022] [Indexed: 11/17/2022] Open
Abstract
Background Use of dual mobility (DM) in total hip arthroplasty has gained popularity due to the ability to reduce dislocation through increased jumping distance and impingement-free arc of movement. Recently, modular dual mobility (modDM) systems were introduced to give the possibility to use DM with standard metal-backed shells, however few has been studied to date regarding how jumping distance and the center of rotation change with modDM. The objective of this study was to evaluate, through analytical simulation, how jumping distance, center of rotation and arc of movement change between DM and standard cups with modDM or fixed bearings (FB). Methods 3D-models of DM and standard press-fit cups with modDM or FB liners were used to simulate DM, modDM and FB implant configurations, matched for same cup size, according to same cup position and different femoral head diameters. Jumping distance was calculated and center of rotation lateralization and oscillation angles were measured for each size of these three implant configurations. Results Jumping distance with modDM was reduced by -3.9 mm to -8.6 mm in comparison with DM, from 48 to 64 mm size, but resulted comparable to polyethylene 36 mm FB and increased by + 1.1 mm and + 1.4 mm than ceramic 36 and 40 mm FBs for sizes > 54 mm. ModDM lateralized the center of rotation up to + 2.5 mm and + 4.0 mm in comparison with DM and FBs, respectively. Oscillation angle with modDM resulted higher than + 16°, + 23°, + 17° and + 14° in comparison to DM, 28 mm, 32 mm and 36 mm FB cups, respectively, for 56 mm cup size. Conclusions According to its specific design, modDM might change hip stability parameters in comparison to DM, worsening jumping distance and center of rotation position, but increasing arc of movement. As not restoring stability parameters in the same fashion, modDM implants should be properly used when DM cups are not feasible.
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6
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Lygrisse KA, Matzko C, Shah RP, Macaulay W, Cooper JH, Schwarzkopf R, Hepinstall MS. Femoral Neck Notching in Dual Mobility Implants: Is This a Reason for Concern? J Arthroplasty 2021; 36:2843-2849. [PMID: 33875287 DOI: 10.1016/j.arth.2021.03.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/08/2021] [Accepted: 03/16/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Dual mobility (DM) total hip arthroplasty (THA) implants have been advocated for patients at risk for impingement due to abnormal spinopelvic mobility. Impingement against cobalt-chromium acetabular bearings, however, can result in notching of titanium femoral stems. This study investigated the incidence of femoral stem notching associated with DM implants and sought to identify risk factors. METHODS A multicenter retrospective study reviewed 256 modular and 32 monoblock DM components with minimum 1-year clinical and radiographic follow-up, including 112 revisions, 4 conversion THAs, and 172 primary THAs. Radiographs were inspected for evidence of femoral notching and to calculate acetabular inclination and anteversion. Revisions and dislocations were recorded. RESULTS Ten cases of femoral notching were discovered (3.5%), all associated with modular cylindrospheric cobalt-chromium DM implants (P = .049). Notches were first observed radiographically at mean 1.3 years after surgery (range 0.5-2.7 years). Notch location was anterior (20%), superior (60%), or posterior (20%) on the prosthetic femoral neck. Notch depth ranged from 1.7% to 20% of the prosthetic neck diameter. Eight cases with notching had lumbar pathology that can affect spinopelvic mobility. None of these notches resulted in stem fracture, at mean 2.7-year follow-up (range 1-7.6 years). There were no dislocations or revisions in patients with notching. CONCLUSION Femoral notching was identified in 3.5% of DM cases, slightly surpassing the dislocation rate in a cohort selected for risk of impingement and instability. Although these cases of notching have not resulted in catastrophic failures thus far, further study of clinical sequelae is warranted. Component position, spinopelvic mobility, and implant design may influence risk.
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Affiliation(s)
| | - Chelsea Matzko
- Department of Orthopedic Surgery, Lenox Hill Hospital, New York, NY
| | - Roshan P Shah
- Department of Orthopedic Surgery, Columbia Univeristy Irving Medical Center, New York, NY
| | - William Macaulay
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY
| | - John H Cooper
- Department of Orthopedic Surgery, Columbia Univeristy Irving Medical Center, New York, NY
| | - Ran Schwarzkopf
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY
| | - Matthew S Hepinstall
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY; Department of Orthopedic Surgery, Lenox Hill Hospital, New York, NY
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7
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Lee GC, Kamath A, Courtney PM. Clinical Concerns With Dual Mobility- Should I Avoid it When Possible? J Arthroplasty 2021; 36:S88-S91. [PMID: 33549418 DOI: 10.1016/j.arth.2021.01.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 01/05/2021] [Indexed: 02/02/2023] Open
Abstract
The utilization of dual mobility (DM) articulations in total hip arthroplasty (THA) is increasing. The principal appeal of DM implants is its ability to reduce postoperative instability by maximizing the effective ball head size for each reconstruction. However, while DM implants have been used worldwide for over 3 decades, the experience in North America is more limited. Moreover, there remains concerns with intraprosthetic dissociation, wear, metallosis, and soft tissue impingement. Therefore, the purpose of this article is to review the available evidence for these potential issues. First, intraprosthetic dissociation (IPD) is a unique complication of DM implants. Although the rate has decreased with improvements in materials and design, the reported prevalence is approximately 1%. Second, wear in DM implants can be unpredictable and increased wear has been reported in younger, active patients. Third, corrosion in modular DM implants has been described and elevations in serum cobalt and chromium levels have been reported. While the clinical significance of these elevations is unclear, it remains a source of concern with these implants. Finally, psoas impingement and entrapment can be a source of persistent groin pain after THA. DM articulations are a valuable addition to the armamentarium of total hip surgeons. However, these bearings are not free of complications. Consequently, current data only support selective use of DM bearings in patients at increased risk for postoperative instability after arthroplasty.
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Affiliation(s)
- Gwo-Chin Lee
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA
| | - Atul Kamath
- Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, OH
| | - P Maxwell Courtney
- Department of Orthopaedic Surgery, Rothman Orthopaedic Institute, Philadelphia, PA
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8
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Pai FY, Ma HH, Chou TFA, Huang TW, Huang KC, Tsai SW, Chen CF, Chen WM. Risk factors and modes of failure in the modern dual mobility implant. A systematic review and meta-analysis. BMC Musculoskelet Disord 2021; 22:541. [PMID: 34126990 PMCID: PMC8204435 DOI: 10.1186/s12891-021-04404-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 05/24/2021] [Indexed: 02/08/2023] Open
Abstract
Background The aims of this meta-analysis were to: (1) validate the outcome of modern dual mobility (DM) designs in patients who had undergone primary and revision total hip arthroplasty (THA) procedures and (2) to identify factors that affect the outcome. Methods We searched for studies that assessed the outcome of modern DM-THA in primary and revision procedures that were conducted between January, 2000 to August, 2020 on PubMed, MEDLINE, Cochrane Reviews and Embase. The pooled incidence of the most common failure modes and patient reported outcomes were evaluated in patients who have received: (1) primary THA, (2) revision THA for all causes or (3) for recurrent dislocation. A meta-regression analysis was performed for each parameter to determine the association with the outcome. The study design of each study was assessed for potential bias and flaws by using the quality assessment tool for case series studies. Results A total of 119 studies (N= 30016 DM-THAs) were included for analysis. The mean follow-up duration was 47.3 months. The overall implant failure rate was 4.2% (primary: 2.3%, revision for all causes: 5.5%, recurrent dislocation: 6.0%). The most common failure modes were aseptic loosening (primary: 0.9%, revision for all causes: 2.2%, recurrent dislocation: 2.4%), septic loosening (primary:0.8%, revision for all causes: 2.3%, recurrent dislocation: 2.5%), extra-articular dislocation (primary:0.6%, revision for all causes:1.3%, recurrent dislocation:2.5%), intra-prosthetic dislocation (primary:0.8%, revision for all causes:1.0%, recurrent dislocation:1.6%) and periprosthetic fracture (primary:0.9%, revision for all causes:0.9%, recurrent dislocation:1.3%). The multi-regression analysis identified younger age (β=-0.04, 95% CI -0.07 – -0.02) and female patients (β=3.34, 95% CI 0.91–5.78) were correlated with higher implant failure rate. Age, gender, posterolateral approach and body mass index (BMI) were not risk factors for extra-articular or intra-prosthetic dislocation in this cohort. The overall Harris hip score and Merle d’Aubigné score were 84.87 and 16.36, respectively. Level of evidence of this meta-analysis was IV. Conclusion Modern dual-mobility designs provide satisfactory mid-term implant survival and clinical performance. Younger age and female patients might impact the outcome after DM-THA. Future research directions should focus on, (1) long-term outcome of modern dual-mobility design, including specific concerns such as intra-prosthetic dislocation and elevated metal ion, and (2) cost-effectiveness analysis of dual-mobility implant as an alternative to conventional THA for patients who are at high risk of dislocation. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-021-04404-4.
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Affiliation(s)
- Fu-Yuan Pai
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, No. 201, Sec 2, Shi-Pai Road, Taipei 112, Taiwan.,Department of Orthopaedics, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan
| | - Hsuan-Hsiao Ma
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, No. 201, Sec 2, Shi-Pai Road, Taipei 112, Taiwan.,Department of Orthopaedics, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan
| | - Te-Feng Arthur Chou
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, No. 201, Sec 2, Shi-Pai Road, Taipei 112, Taiwan.,Department of Orthopaedics, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan
| | - Tsan-Wen Huang
- Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Orthopaedic Surgery, Chang-Gung Memorial Hospital, Chiayi, Taiwan
| | - Kuo-Chin Huang
- Chang Gung University College of Medicine, Taoyuan, Taiwan.,Department of Orthopaedic Surgery, Chang-Gung Memorial Hospital, Chiayi, Taiwan
| | - Shang-Wen Tsai
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, No. 201, Sec 2, Shi-Pai Road, Taipei 112, Taiwan.,Department of Orthopaedics, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan
| | - Cheng-Fong Chen
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, No. 201, Sec 2, Shi-Pai Road, Taipei 112, Taiwan. .,Department of Orthopaedics, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan.
| | - Wei-Ming Chen
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, No. 201, Sec 2, Shi-Pai Road, Taipei 112, Taiwan.,Department of Orthopaedics, School of Medicine, National Yang-Ming Chiao-Tung University, Taipei, Taiwan
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9
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French JMR, Bramley P, Scattergood S, Sandiford NA. Adverse reaction to metal debris due to fretting corrosion between the acetabular components of modular dual-mobility constructs in total hip replacement: a systematic review and meta-analysis. EFORT Open Rev 2021; 6:343-353. [PMID: 34150328 PMCID: PMC8183148 DOI: 10.1302/2058-5241.6.200146] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Modular dual-mobility (MDM) constructs can be used to reduce dislocation rates after total hip replacement (THR). However, there are concerns about adverse reaction to metal debris (ARMD) as a result of fretting corrosion between the metal liner and shell. This systematic review reports outcomes following THR using MDM components. It was registered with PROSPERO and conducted in line with Cochrane and PRISMA recommendations.Sixteen articles were included overall, with meta-analysis performed on relevant subsets using a random intercept logistic regression model. Estimated median incidence of ARMD requiring revision surgery within study follow-up period was 0.3% (95% CI 0.1 - 1.8%, from 11 cohort studies containing 1312 cases).Serum metal ion levels were mildly raised in 7.9% of cases, and significantly raised in 1.8%, but there was no correlation with worse clinical hip function scores within studies. Dislocation rate was 0.8%. Revision rate was 3.3%.There are mixed reports of wear on the backside of the metal liner from the acetabular shell and screw heads. Both implant design and component malseating are implicated, but currently it is unclear to what extent each factor is responsible.Studies were poor quality with high risk of confounding, especially from trunnion corrosion. We have made recommendations for further work. In the meantime, surgeons should be aware of the potential risk of ARMD when considering using an MDM prosthesis, and, if selecting one, must ensure proper seating of the liner and screws intraoperatively. Cite this article: EFORT Open Rev 2021;6:343-353. DOI: 10.1302/2058-5241.6.200146.
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Affiliation(s)
- Jonathan M R French
- Bristol Royal Infirmary, University Hospitals Bristol NHS Trust, Bristol, UK
| | - Paul Bramley
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Sean Scattergood
- Bristol Royal Infirmary, University Hospitals Bristol NHS Trust, Bristol, UK
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10
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Kamath AF, Courtney PM, Lee GC. Metal ion levels with use of modular dual mobility constructs: Can the evidence guide us on clinical use? J Orthop 2021; 24:91-95. [PMID: 33679034 DOI: 10.1016/j.jor.2021.02.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 02/14/2021] [Indexed: 11/18/2022] Open
Abstract
Introduction Dual mobility (DM) use in total hip arthroplasty (THA) has increased, particularly for prevention and management of instability. However, a modular interface raises concern for metal ion generation. The purpose of this study was to determine the 1) serum cobalt and chromium levels; 2) prevalence of ion levels >1 mcg/L; and 3) effect of femoral head material on ion levels following THA using modular DM bearings. Methods We performed a systematic review (MEDLINE, Embase, Cochrane databases) for articles relating to metal ion levels and modular DM (MDM) THA. Eight studies (290 patients) met the inclusion criteria. We recorded post-operative ion levels at a minimum of 12 months, and compared levels with ceramic (n = 125) and metal femoral heads (n = 165). A meta-analysis could not be performed due to poor study quality and heterogeneity. Results At average follow-up of 30.4 months, mean cobalt level was 0.71 mcg/L, and mean chromium level was 0.66 mcg/L [22 patients (8%) had elevated ion levels above 1 mcg/L]. When compared to MDM with a ceramic head, metal head use had higher cobalt (1.26 vs. 0.42 mcg/L) and chromium levels (1.23 vs. 0.46 mcg/L). MDM with a metal head was 1.30 times more likely to have elevated ion levels >1 mcg/L. There was no effect of ion levels on outcome scores. Conclusions Measurable elevations of serum cobalt and chromium levels are present in patients with well-functioning MDM THAs. The impact and contributions of the additional metal liner interface are still unclear. The use of a ceramic head appears to mitigate ion release, while reducing other mechanisms of metallosis like taper corrosion. Higher quality studies are necessary to understand whether MDM bearings pose long term issues. Until then, the judicious use of MDM articulations is recommended.
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Affiliation(s)
- Atul F Kamath
- Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, OH, USA
| | - P Maxwell Courtney
- Department of Orthopaedic Surgery, Rothman Orthopaedic Institute, Philadelphia, PA, USA
| | - Gwo-Chin Lee
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
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11
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Serum metal ion levels in modular dual mobility acetabular components: A systematic review. J Orthop 2020; 21:432-437. [PMID: 32968337 DOI: 10.1016/j.jor.2020.08.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 08/11/2020] [Indexed: 01/19/2023] Open
Abstract
Background Dual mobility (DM) constructs effectively reduce the risk of dislocation in revision and high risk primary total hip arthroplasty. However, modular DM designs require the use of a cobalt-chrome liner against a titanium cup which may induce corrosion, metal ions release, and associated biologic response. The purpose of this systematic review study was to collect all reported cases of serum metal ions after DM in the literature and ask the following questions: 1) what is the overall rate of significantly elevated Cobalt and Chromium metal ions and how do these levels change over time? 2) Does femoral head material composition influence serum metal ion levels? and 3) were there any atypical lymphocytic associated lesions after modular DM that required revision surgery? Methods A systematic review was performed according to PRISMA guidelines. In addition to patient demographics, information specific to the performance of the DM implant were recorded including: cobalt and chromium serum ion levels and all reported timepoints, the material composition of the femoral head, all revision and reoperations and any failure related to corrosion of the DM bearing. A significant elevation in cobalt or chromium was defined as >1.0 or >1.6 mcg/L. Results 248 modular DM THAs were analyzed. The cumulative mean cobalt and chromium levels for all included studies was 0.47mcg/L and 0.53mcg/L, respectively. At final follow-up 13 patients (5.2%) had elevated cobalt ion levels and 4 patients (1.6%) had elevated chromium ion levels. Femoral head material composition trended towards but did not significantly increase serum ion levels. Ceramic heads had elevated cobalt and chromium ions in 4/135 (3%) of patients compared to metal heads which had elevated cobalt ions in 9/113 (8%) and elevated chromium ions in 0/113 (0%), (p = 0.09). There were no reoperations or revisions for metal related reactions at final follow-up (mean 27.4 months). Conclusion In this systematic review including 248 modular DM THAs, elevated serum cobalt ions were present in 5.2% of patients at a mean follow-up of 27.4 months. While a trend towards increased Cobalt serum ions with the use of cobalt chrome femoral heads, femoral head composition was not significantly associated with increased serum metal ion levels. At final follow-up, metal ion levels appear to decrease in the majority of patients between 1 and 2 years and no patient was revised for metal ion related complications. Continued serum metal ion surveillance is recommended to ensure the safety of DM constructs in THA with longer term follow-up.
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12
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Heckmann N, Weitzman DS, Jaffri H, Berry DJ, Springer BD, Lieberman JR. Trends in the use of dual mobility bearings in hip arthroplasty. Bone Joint J 2020; 102-B:27-32. [DOI: 10.1302/0301-620x.102b7.bjj-2019-1669.r1] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aims Dual mobility (DM) bearings are an attractive treatment option to obtain hip stability during challenging primary and revision total hip arthroplasty (THA) cases. The purpose of this study was to analyze data submitted to the American Joint Replacement Registry (AJRR) to characterize utilization trends of DM bearings in the USA. Methods All primary and revision THA procedures reported to AJRR from 2012 to 2018 were analyzed. Patients of all ages were included and subdivided into DM and traditional bearing surface cohorts. Patient demographics, geographical region, hospital size, and teaching affiliation were assessed. Associations were determined by chi-squared analysis and logistic regression was performed to assess outcome variables. Results A total of 406,900 primary and 34,745 revision THAs were identified, of which 35,455 (8.7%) and 8,031 (23.1%) received DM implants respectively. For primary THA, DM usage increased from 6.7% in 2012 to 12.0% in 2018. Among revision THA, DM use increased from 19.5% in 2012 to 30.6% in 2018. Patients < 50 years of age had the highest rates of DM implantation in every year examined. For each year of increase in age, there was a 0.4% decrease in the rate of DM utilization (odds ratio (OR) 0.996 (95% confidence interval (CI) 0.995 to 0.997); p < 0.001). Females were more likely to receive a DM implant compared to males (OR 1.077 (95% CI 1.054 to 1.100); p < 0.001). Major teaching institutions and smaller hospitals were associated with higher rates of utilization. DM articulations were used more commonly for dysplasia compared with osteoarthritis (OR 2.448 (95% CI 2.032 to 2.949); p < 0.001) during primary THA and for instability (OR 3.130 (95% CI 2.751 to 3.562) vs poly-wear; p < 0.001) in the revision setting. Conclusion DM articulations showed a marked increase in utilization during the period examined. Younger patient age, female sex, and hospital characteristics such as teaching status, smaller size, and geographical location were associated with increased utilization. DM articulations were used more frequently for primary THA in patients with dysplasia and for revision THA in patients being treated for instability. Cite this article: Bone Joint J 2020;102-B(7 Supple B):27–32.
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Affiliation(s)
- Nathanael Heckmann
- Keck School of Medicine of USC, Department of Orthopaedic Surgery, Los Angeles, California, USA
| | - Dena S. Weitzman
- American Academy of Orthopaedic Surgeons, Rosemont, Illinois, USA
| | - Heena Jaffri
- American Academy of Orthopaedic Surgeons, Rosemont, Illinois, USA
| | - Daniel J. Berry
- Mayo Clinic, Department of Orthopedic Surgery, Rochester, Minnesota, USA
| | | | - J. R. Lieberman
- Keck School of Medicine of USC, Department of Orthopaedic Surgery, Los Angeles, California, USA
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Haddad FS. International dissemination. Bone Joint J 2020; 102-B:805-806. [PMID: 32600146 DOI: 10.1302/0301-620x.102b7.bjj-2020-1161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- F S Haddad
- The Bone & Joint Journal, Professor of Orthopaedic Surgery, University College London Hospitals, The Princess Grace Hospital, and The NIHR Biomedical Research Centre at UCLH, London, UK
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