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Tang AB, Diaz-Ramirez LG, Boscardin WJ, Smith AK, Ward D, Glymour MM, Whitlock EL. Long-term cognitive outcome after elective hip or knee total joint arthroplasty: A population-based observational study. J Am Geriatr Soc 2024; 72:1338-1347. [PMID: 38190295 PMCID: PMC11090741 DOI: 10.1111/jgs.18724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/27/2023] [Accepted: 11/19/2023] [Indexed: 01/10/2024]
Abstract
BACKGROUND One year after elective hip or knee total joint arthroplasty (TJA), >30% of older adults meet criteria for postoperative neurocognitive disorder. However, this is not contextualized with long-term cognitive outcomes in comparable surgical and nonsurgical controls. We analyzed population-based data to compare long-term cognitive outcomes in older adults after TJA, other surgeries, and with and without arthritis pain. METHODS This was a retrospective observational analysis of United States older adults in the Health and Retirement Study (HRS) who underwent elective TJA, or elective surgery without expected functional benefits (e.g., cholecystectomy; inguinal herniorrhaphy), between 1998 and 2018 at aged 65 or older. TJA recipients were also age- and sex-matched to nonsurgical controls who reported moderate-severe arthritic pain or denied pain, so that comparison groups included surgical and nonsurgical (pain-suffering and pain-free) controls. We modeled biennially-assessed memory performance, a measure of direct and proxy cognitive assessments, before and after surgery, normalized to the rate of memory decline ("cognitive aging") in controls to express effect size estimates as excess, or fewer, months of memory decline. We used linear mixed effects models adjusted for preoperative health and demographic factors, including frailty, flexibly capturing time before/after surgery (knots at -4, 0, 8 years; discontinuity at surgery). RESULTS There were 1947 TJA recipients (average age 74; 63% women; 1358 knee, 589 hip) and 1631 surgical controls (average age 76; 38% women). Memory decline 3 years after TJA was similar to surgical controls (5.2 [95% confidence interval, CI -1.2 to 11.5] months less memory decline in the TJA group, p = 0.11) and nonsurgical controls. At 5 years, TJA recipients experienced 5.0 [95% CI -0.9 to 10.9] months less memory decline than arthritic pain nonsurgical controls. CONCLUSION There is no systematic accelerated memory decline at 3 years after TJA compared with surgical or nonsurgical controls.
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Affiliation(s)
- Angelina B Tang
- School of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - L Grisell Diaz-Ramirez
- Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - W John Boscardin
- Department of Epidemiology & Biostatistics, University of California, San Francisco, San Francisco, California, USA
| | - Alexander K Smith
- Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
- Division of Geriatrics, Department of Medicine, San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - Derek Ward
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA
| | - M Maria Glymour
- Department of Epidemiology, Boston University, Boston, Massachusetts, USA
| | - Elizabeth L Whitlock
- Department of Anesthesia & Perioperative Care, University of California, San Francisco, San Francisco, California, USA
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Reich KM, Gill SS, Eckenhoff R, Berger M, Austin PC, Rochon PA, Nguyen P, Goodarzi Z, Seitz DP. Association between surgery and rate of incident dementia in older adults: A population-based retrospective cohort study. J Am Geriatr Soc 2024; 72:1348-1359. [PMID: 38165146 PMCID: PMC11090718 DOI: 10.1111/jgs.18736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 10/09/2023] [Accepted: 11/16/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND The risk of incident dementia after surgery in older adults is unclear. The study objective was to examine the rate of incident dementia among older adults after elective surgery compared with a matched nonsurgical control group. METHODS We conducted a population-based, propensity-matched retrospective cohort study using data from linked administrative databases in Ontario, Canada. All community-dwelling individuals aged 66 years and older who underwent one of five major elective surgeries between April 1, 2007 and March 31, 2011 were included. Each surgical patient was matched 1:1 on surgical specialty of the surgeon at consultation, age, sex, fiscal year of entry, and propensity score with a patient who attended an outpatient visit with a surgeon of the same surgical specialty but did not undergo surgery. Patients were followed for up to 5 years after cohort entry for the occurrence of a new dementia diagnosis, defined from administrative data. Cause-specific hazard models were used to estimate the hazard ratio (HR) and 95% confidence interval (CI) for the association between surgery and the hazard of incident dementia. Subgroup and sensitivity analyses were performed. RESULTS A total of 27,878 individuals (13,939 matched pairs) were included in the analysis. A total of 640 (4.6%) individuals in the surgical group and 965 (6.9%) individuals in the control group developed dementia over the 5-year follow-up period. Individuals who underwent surgery had a reduced rate of incident dementia compared with their matched nonsurgical controls (HR 0.88; 95% CI 0.80-0.97; p = 0.01). This association was persistent in most subgroups and after sensitivity analyses. CONCLUSIONS Elective surgery did not increase the rate of incident dementia when compared with matched nonsurgical controls. This could be an important consideration for patients and surgeons when elective surgery is considered.
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Affiliation(s)
- Krista M Reich
- Division of Geriatric Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Sudeep S Gill
- Division of Geriatric Medicine, Department of Medicine, Queen's University, Kingston, Ontario, Canada
- ICES Queen's, Queen's University, Kingston, Ontario, Canada
| | - Roderic Eckenhoff
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Miles Berger
- Department of Anesthesiology, Duke Center for the Study of Aging and Human Development, and the Duke/UNC Alzheimer's Disease Research Center, Duke University Medical Centre, Durham, North Carolina, USA
| | - Peter C Austin
- ICES, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Paula A Rochon
- ICES, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
- Division of Geriatric Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
- Women's College Research Institute, Women's College Hospital, Toronto, Ontario, Canada
| | - Paul Nguyen
- ICES Queen's, Queen's University, Kingston, Ontario, Canada
| | - Zahra Goodarzi
- Division of Geriatric Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Dallas P Seitz
- ICES Queen's, Queen's University, Kingston, Ontario, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Department of Psychiatry, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Zheng X, Luo H, Li J, Yang Z, Zhuan X, Li X, Chen Y, Huo S, Zhou X. Zinc-doped bioactive glass-functionalized polyetheretherketone to enhance the biological response in bone regeneration. J Biomed Mater Res A 2024. [PMID: 38514993 DOI: 10.1002/jbm.a.37710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/28/2024] [Accepted: 03/11/2024] [Indexed: 03/23/2024]
Abstract
Polyether ether ketone (PEEK) is gaining recognition as a highly promising polymer for orthopedic implants, attributed to its exceptional biocompatibility, ease of processing, and radiation resistance. However, its long-term in vivo application faces challenges, primarily due to suboptimal osseointegration from postimplantation inflammation and immune reactions. Consequently, biofunctionalization of PEEK implant surfaces emerges as a strategic approach to enhance osseointegration and increase the overall success rates of these implants. In our research, we engineered a multifaceted PEEK implant through the in situ integration of chitosan-coated zinc-doped bioactive glass nanoparticles (Zn-BGNs). This novel fabrication imbues the implant with immunomodulatory capabilities while bolstering its osseointegration potential. The biofunctionalized PEEK composite elicited several advantageous responses; it facilitated M2 macrophage polarization, curtailed the production of inflammatory mediators, and augmented the osteogenic differentiation of bone marrow mesenchymal stem cells. The experimental findings underscore the vital and intricate role of biofunctionalized PEEK implants in preserving normal bone immunity and metabolism. This study posits that utilizing chitosan-BGNs represents a direct and effective method for creating multifunctional implants. These implants are designed to facilitate biomineralization and immunomodulation, making them especially apt for orthopedic applications.
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Affiliation(s)
- Xiaoyu Zheng
- Guangdong Medical University, Zhanjiang, China
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
| | - Han Luo
- Guangdong Medical University, Zhanjiang, China
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
| | - Jingzhi Li
- Guangdong Medical University, Zhanjiang, China
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
| | - Zhenyu Yang
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
- Southern Medical University, Guangzhou, China
| | - Xiaoquan Zhuan
- Southern Medical University, Guangzhou, China
- The Department of Orthopaedic, Clifford Hospital affiliated to Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoquan Li
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
| | - Yuting Chen
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
| | - Shicheng Huo
- Department of Orthopedic Surgery, Spine Center, Changzheng Hospital, Navy Medical University, Shanghai, China
| | - Xiaozhong Zhou
- Guangdong Medical University, Zhanjiang, China
- The Spine Department, Orthopaedic Center, Guangdong Second Provincial General Hospital, Zhanjiang, China
- Southern Medical University, Guangzhou, China
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Beba A, Peterson SM, Brennan PC, O’Byrne J, Machulda MM, Jannetto PI, Vemuri P, Lewallen DG, Kremers HM, Vassilaki M. Correlation of Blood Metal Concentrations with Cognitive Scores and Neuroimaging Findings in Patients with Total Joint Arthroplasty. J Alzheimers Dis 2023; 94:1335-1342. [PMID: 37393495 PMCID: PMC10481381 DOI: 10.3233/jad-221182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2023]
Abstract
Total joint arthroplasty (TJA) implants are composed of metals, ceramics, and/or polyethylene. Studies suggest that the debris released from metal implants may possess neurotoxic properties with reports of neuropsychiatric symptoms and memory deficits, which could be relevant to Alzheimer's disease and related dementias. This exploratory study examined the cross-sectional correlation of blood metal concentrations with cognitive performance and neuroimaging findings in a convenience sample of 113 TJA patients with history of elevated blood metal concentrations of either titanium, cobalt and/or chromium. Associations with neuroimaging measures were observed but not with cognitive scores. Larger studies with longitudinal follow-up are warranted.
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Affiliation(s)
- Alican Beba
- George Washington University, Columbian College of Arts and Sciences, Washington, DC, USA
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
| | | | - Peter C. Brennan
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Jamie O’Byrne
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
| | - Mary M. Machulda
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Paul I. Jannetto
- Department of Laboratory Medicine & Pathology, Mayo Clinic, Rochester, MN, USA
| | | | | | - Hilal Maradit Kremers
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Maria Vassilaki
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
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