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Bendtsen MAF, Odgaard A, Madsen F, Mosegaard SB, Thomsen JS, Hauge EM, Søballe K, Stilling M. Preoperative proximal tibial bone density, bone microarchitecture, and bone turnover are not associated with postoperative tibial component migration in cemented and cementless medial unicompartmental knee replacements: secondary analyses from a randomized controlled trial. Acta Orthop 2024; 95:121-129. [PMID: 38391197 PMCID: PMC10885816 DOI: 10.2340/17453674.2024.39917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 11/16/2023] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND AND PURPOSE Cementless arthroplasty fixation relies on early bone ingrowth and may be poor in patients with low proximal tibial bone density or abnormal bone turnover. We aimed first to describe the baseline bone properties in patients undergoing medial unicompartmental knee replacement (UKR), and second to investigate its association with cemented and cementless tibial component migration until 2 years. METHODS A subset investigation of 2 patient groups from a 3-armed randomized controlled trial was conducted. There were 26 cemented and 25 cementless medial UKRs with twin-pegged femoral components. Volumetric bone mineral density (vBMD) and microstructure of the excised medial tibial plateau were ascertained with µCT. Bone turnover was estimated using dynamic histomorphometry (eroded surface/bone surface = ES/BS, osteoid surface/bone surface = OS/BS, mineralizing surface/bone surface = MS/BS). Tibial component migration in 4 feature points was followed for 2 years with radiostereometry. RESULTS At the 2-year follow-up, the cementless tibial components migrated 0.38 mm (95% confidence interval [CI] 0.14-0.62) total translation more than the cemented components at the posterior feature point. The greatest migration in the cementless group was subsidence at the posterior feature point of 0.66 mm (CI 0.48-0.84) until 6 weeks, and from 3 months the components were stable. Cemented tibial components subsided very little. Between 1- and 2-year follow-ups, no cementless but 4 cemented tibial components revealed continuous migration. OS/BS was half of the ES/BS. No µCT or histomorphometric parameters showed any clinically relevant correlation with tibial component migration at the posterior feature point for either cemented or cementless UKR at 6 weeks' or 2 years' follow-up after adjustment for age, BMI, and sex. CONCLUSION Preoperative vBMD, bone turnover, and microstructure were not associated with postoperative tibial component migration of cemented and cementless medial UKR.
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Affiliation(s)
- Mathias Alrø Fichtner Bendtsen
- Department of Clinical Medicine, Aarhus University, Aarhus; AutoRSA Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus.
| | - Anders Odgaard
- Department of Orthopaedic Surgery, Rigshospitalet-Copenhagen University Hospital, Copenhagen; Department of Clinical Medicine, University of Copenhagen, Copenhagen
| | - Frank Madsen
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus
| | | | | | | | - Kjeld Søballe
- Department of Clinical Medicine, Aarhus University, Aarhus; Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, Aarhus; AutoRSA Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus; Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus
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Niesen AE, Hull ML. State of the Art in Radiostereometric Analysis for Tibial Baseplate Migration and Future Research Directions. J Biomech Eng 2023; 145:120801. [PMID: 37792485 DOI: 10.1115/1.4063626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 09/25/2023] [Indexed: 10/06/2023]
Abstract
Radiostereometric analysis (RSA) measures movement (migration) of a baseplate relative to the underlying tibia after total knee arthroplasty (TKA) and has been used extensively to evaluate safety of new implant designs and/or surgical techniques regarding baseplate loosening. Because RSA is a complex methodology which involves various choices that researchers make, including whether to use marker-based or model-based methods, which migration metric to report, how to relate short-term migrations to long-term risk, and how these choices impact error, the objectives of this review were to: (1) lay out a comprehensive structure illustrating the multiple components/considerations for RSA and their interrelations, (2) review components of the structure using the latest RSA literature, and (3) use the preceding review as a context for identifying future areas of study. The components to be reviewed were structured using the following topics: type of RSA, migration metrics, sources of error, studies/reports of error, stability limits, and studies of error in stability limits. Based on the current RSA literature and knowledge gaps which exist, the following future research directions were identified: (1) revising the ISO standard to require reporting of clinical measurement error (bias) and recommending use of a local baseplate coordinate system, (2) identifying the migration metric and associated threshold most predictive of baseplate loosening for individual patients, (3) creating a method for data sharing to improve individual patient diagnostics, and (4) determining an appropriate stability limit for model-based RSA for group stability and individual patient diagnostics.
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Affiliation(s)
- Abigail E Niesen
- Department of Biomedical Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616
| | - Maury L Hull
- Department of Biomedical Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616; Department of Mechanical Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616; Department of Orthopaedic Surgery, University of California Davis Medical Center, 4860 Y Street, Suite 3800, Sacramento, CA 95817
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Linde KN, Rytter S, Søballe K, Madsen F, Langdahl B, Stilling M. Component migration, bone mineral density changes, and bone turnover markers in cementless and cemented total knee arthroplasty: a prospective randomized RSA study in 53 patients with 2-year follow-up. Knee Surg Sports Traumatol Arthrosc 2022; 30:3100-3113. [PMID: 35099597 DOI: 10.1007/s00167-022-06860-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/31/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE Cementless tibial components migrate initially until osseointegration and preserve periprosthetic bone. Cemented tibial components are fixed from surgery but loose periprosthetic bone. Little is known about bone formation and resorption biomarkers in relation to component fixation and bone mineral density (BMD) changes of cementless and cemented total knee arthroplasty. We hypothesize a similar migration of cemented and cementless tibial components between 1- and 2-year follow-up indicating a stable long-term fixation. METHODS In a prospective patient-blinded randomized study, we compared cementless (n = 27) and cemented (n = 26) tibial components with radiostereometry measured migration (MTPM = Maximum Total Point Motion: point of component that migrates the most) and changes in BMD and biochemical bone turnover markers (BTMs) until 24 months after surgery. RESULTS The mean MTPM between 12 and 24 months were similar between groups with - 0.06 mm (95% CI - 0.23; 0.11) in the cementless group compared to 0.02 mm (95% CI - 0.07; 0.11) in the cemented group. However, there was a higher proportion of cementless components (16/25) than cemented components (7/24) with continuous migration (MTPM > 0.2 mm) (p = 0.02). In the medial and anterior region below the tibial components, the BMD increased by mean 1.8% and 7.4% for cementless components and decreased by mean 8.6% and 4.2% for cemented components until 24-month follow-up. In both groups, BTMs initially showed increased bone resorption (CTx) and bone formation (P1NP) followed by normalization to pre-operative levels at 6 months post-surgery. CONCLUSION More cementless components than cemented components showed continues migration which suggest a higher risk of early revision. Bone turnover increased post-surgery in both groups, but did not explain the difference in change in periprosthetic BMD. LEVEL OF EVIDENCE I.
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Affiliation(s)
- Karina Nørgaard Linde
- Department of Orthopedics, Aarhus University Hospital, Aarhus, Denmark. .,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark. .,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.
| | - Søren Rytter
- Department of Orthopedics, Aarhus University Hospital, Aarhus, Denmark.,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Kjeld Søballe
- Department of Orthopedics, Aarhus University Hospital, Aarhus, Denmark.,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Frank Madsen
- Department of Orthopedics, Aarhus University Hospital, Aarhus, Denmark
| | - Bente Langdahl
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul-Jensens Bouldevard 99, Aarhus N, 8200, Aarhus, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Maiken Stilling
- Department of Orthopedics, Aarhus University Hospital, Aarhus, Denmark.,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
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Wei W, Wu Y, Zeng Y, Shen B. [Progress of change in bone mineral density after knee arthroplasty]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:124-129. [PMID: 33448210 DOI: 10.7507/1002-1892.202006068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To summarize research progress of change in bone mineral density (BMD) after knee arthroplasty and its diagnostic methods, influencing factors, and drug prevention and treatment. Methods The relevant literature at home and abroad was reviewed and summarized from research status of the advantages and disadvantages of BMD assessment methods, the trend of changes in BMD after knee arthroplasty and its influencing factors, and the differences in effectiveness of drugs. Results The central BMD and mean BMD around the prosthesis decrease after knee arthroplasty, which is closely associated with body position, age, weight, daily activities, and the fixation methods, design, and material of prosthesis. Denosumab, bisphosphonates, and teriparatide et al. can decrease BMD loss after knee arthroplasty. Conclusion BMD after knee arthroplasty decreases, which is related to various factors, but the mechanism is unclear. At present, some inhibitors of bone resorption can decrease BMD loss after knee arthroplasty. However, its long-term efficacy remains to be further explored.
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Affiliation(s)
- Wenxing Wei
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yuangang Wu
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yi Zeng
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Bin Shen
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
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