Publications by authors named "Tanzer M"

Background: The present study examines the interplay between epistemic stance, attachment dimensions, and childhood trauma in relation to specific demographic factors and mental health outcomes. This study aims to understand how these factors form distinct profiles among individuals, to identify those at risk of mental health concerns.

Method: Latent Profile Analysis (LPA) was employed on a dataset from the general population (n = 500) to identify subgroups of individuals based on their epistemic stance (mistrust and credulity), attachment dimensions, and childhood trauma.

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Epistemic trust - defined as readiness to regard knowledge, communicated by another agent, as significant, relevant to the self, and generalizable to other contexts-has recently been applied to the field of developmental psychopathology as a potential risk factor for psychopathology. The work described here sought to investigate how the vulnerability engendered by disruptions in epistemic trust may not only impact psychological resilience and interpersonal processes but also aspects of more general social functioning. We undertook two studies to examine the role of epistemic trust in determining capacity to recognise fake/real news, and susceptibility to conspiracy thinking-both in general and in relation to COVID-19.

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There is growing concern about the impact of declining political trust on democracies. Psychological research has introduced the concept of epistemic (mis)trust as a stable disposition acquired through development, which may influence our sociopolitical engagement. Given trust's prominence in current politics, we examined the relationship between epistemic trust and people's choices of (un)trustworthy political leaders.

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Article Synopsis
  • Toxic epidermal necrolysis (TEN) is a severe and potentially deadly skin reaction caused by common medications, featuring rapid skin detachment due to cell death, with no effective treatments currently available.
  • Researchers used deep visual proteomics to analyze skin biopsies from TEN patients, identifying significant changes in proteins related to type I and II interferon signaling and activated phosphorylated STAT1, which are believed to drive the condition.
  • The study found that using JAK inhibitors, like tofacitinib and baricitinib, effectively reduced skin damage in both mouse models and human patients with TEN, indicating these pathways could be targeted for potential new treatments.
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Fibrosis represents the uncontrolled replacement of parenchymal tissue with extracellular matrix (ECM) produced by myofibroblasts. While genetic fate-tracing and single-cell RNA-Seq technologies have helped elucidate fibroblast heterogeneity and ontogeny beyond fibroblast to myofibroblast differentiation, newly identified fibroblast populations remain ill defined, with respect to both the molecular cues driving their differentiation and their subsequent role in fibrosis. Using an unbiased approach, we identified the metalloprotease ADAMTS12 as a fibroblast-specific gene that is strongly upregulated during active fibrogenesis in humans and mice.

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Coronavirus disease 2019 (COVID-19) has affected not only individual lives but also the world and global systems, both natural and human-made. Besides millions of deaths and environmental challenges, the rapid spread of the infection and its very high socioeconomic impact have affected healthcare, economic status and wealth, and mental health across the globe. To better appreciate the pandemic's influence, multidisciplinary and interdisciplinary approaches are needed.

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Background: Advancements in musculoskeletal oncologic treatment have allowed for longer survival of patients with malignant bone tumors and the associated longer use of tumor endoprostheses in those who have had such reconstructions. Several studies have reported on increased serum metal ions with the use of such implants. Modularity in these implants introduces the risk of taper junction corrosion and subsidence resulting in metal wear particle release that may cause an adverse local tissue reaction or systemic toxicity.

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Background: Total knee arthroplasty (TKA) is the most commonly performed joint replacement procedure in North America. Few studies have successfully evaluated the episode-of-care cost (EOCC) of common elective orthopedic procedures using an activity-based costing (ABC) framework. The objective of this study is to compare the EOCC of same-day discharge versus inpatient TKA using an activity-based costing methodology.

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Importance: Prophylactic administration of antibiotics before skin incision is an important component in the prevention of periprosthetic joint infection in arthroplasty surgery. For antibiotics to be effective, the local tissue concentration (LTC) must exceed the minimum inhibitory concentration of typical infecting organisms; however, the LTC of cefazolin during arthroplasty is poorly understood.

Objective: To compare the systemic concentration of cefazolin in serum with the LTC in fat, synovium, and bone during primary total knee arthroplasty (TKA) while assessing the effect of tourniquet inflation.

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Our emotional state can influence how we understand other people's emotions, leading to biases in social understanding. Yet emotional egocentric biases in specific relationships such as parent-child dyads, where not only understanding but also emotional and bodily regulation is key, remain relatively unexplored. To investigate these biases and control for sensory priors, we first conducted two experiments in dyads of adult strangers (total N=75) using a bodily Emotional Egocentricity Task that enables simultaneous affective tactile stimulation within a dyad.

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Article Synopsis
  • A 38-year-old man with congenital pain insensitivity had both legs amputated below the knee and received osseointegration limb replacements, which led to severe knee problems.
  • Instead of opting for above-knee amputations, he had staged total knee arthroplasties (TKA) that yielded excellent results after one year.
  • The successful TKA was performed using a nonkeeled cementless tibial component and a tibial cone to address challenges from the previous limb replacement and limited bone structure.
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Importance: There is no decision-making framework in the early-adoption stage of novel surgical technologies, putting the quality of health care and resource allocation of the health care system at risk.

Objective: To investigate relevant weighted criteria that decision-makers may use to make an informed decision for the early adoption of innovative surgical technologies.

Design, Setting, And Participants: This multi-institutional decision analytical modeling study used a mixed-methods multicriteria decision analysis (MCDA) and had 2 phases.

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Bioactive surface coatings have retained the attention of researchers and physicians due to their versatility and range of applications in orthopedics, particularly in infection prevention. Antibacterial metal nanoparticles (mNPs) are a promising therapeutic, with vast application opportunities on orthopedic implants. The current research aimed to construct a polyelectrolyte multilayer on a highly porous titanium implant using alternating thin film coatings of chitosan and alginate via the layer-by-layer (LbL) self-assembly technique, along with the incorporation of silver nanoparticles (AgNPs) or titanium dioxide nanoparticles (TiONPs), for antibacterial and osteoconductive activity.

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Background: Squeaking is a known complication of ceramic-on-ceramic (CoC) total hip arthroplasty (THA), yet there is a lack of studies specifically quantifying its loudness. The aims of this study were: (1) to determine the incidence of squeaking in CoC THAs at long-term follow-up; (2) to identify risk factors; and (3) to quantify the loudness of the squeaking.

Methods: A specifically designed prospective questionnaire was used to determine the prevalence, characteristics, and loudness of squeaking in 130 (110 patients) primary THAs with fourth-generation CoC bearings at a mean follow-up of 10.

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Background: Periprosthetic joint infections (PJI) following joint arthroplasty are now the leading cause of reoperation and are associated with serious morbidity to the patient, often requiring several staged operations and a prolonged course of parenteral antibiotics. Prophylactic administration of intravenous antibiotics before skin incision is arguably the most important measure to prevent PJI; however, the dose effectiveness of cefazolin in target tissue is not well known. We aimed to identify parameters affecting local tissue concentration (LTC) of cefazolin.

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Article Synopsis
  • Achieving strong bone fixation in cases of megaprosthesis revision is challenging due to significant bone loss.
  • A custom-made stem and cone were developed for a 36-year-old male with a failed distal femoral replacement after osteosarcoma treatment, preserving bone stock in the proximal femur.
  • The patient regained normal function without assistive devices, and follow-up imaging confirmed stable implant fixation after one year, showcasing the effectiveness of the custom cone in avoiding a total femoral replacement.
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To be effective, the concentration of antibiotic used must exceed the minimum inhibitory concentration (MIC) against infecting organisms at and in the surgical site. Few studies follow antibiotic levels for tissues that are manipulated during surgery. The aim of this work was to develop and validate a novel LC-MS method as well as an efficient extraction technique for the quantification of cefazolin in local tissues and whole blood.

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Disturbed interoception (i.e., the sensing, awareness, and regulation of internal body signals) has been found across several mental disorders, leading to the development of interoception-based interventions (IBIs).

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Objectives: In 2020, Canada spent 12.9 percent of its GDP on healthcare, of which 3 percent was on medical devices. Early adoption of innovative surgical devices is mostly driven by physicians and delaying adoption can deprive patients of important medical treatments.

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Background: Traffic in the operating room (OR) create turbulence and contaminates air by bacterial shedding. Therefore, we examined: (1) if the number and duration of door openings were associated with increased particles during arthroplasty surgery; (2) if traffic cameras installed in the operating room were an effective intervention to decrease traffic and particles during arthroplasty surgery; and (3) the effectiveness of traffic camera over time.

Methods: Fifty cases were included between November 3, 2021, and June 22, 2022, with 25 cases in each group.

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Heterotopic ossification (HO) is a common complication after total hip arthroplasty (THA) and can result in pain and loss of motion of the hip. This is the first study in the literature to determine if a short course of Celecoxib is effective in the prevention of HO in patients undergoing cementless THA. In this retrospective study of prospectively collected data, consecutive patients undergoing a primary cementless THA were reviewed at a 2-year follow-up.

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Cannabis is the world's most used illegal drug. The main psychoactive component of cannabis is Δ9-tetrahydrocannabinol (THC). To aid the identification of cannabis-impaired individuals, a simple but effective workflow for reliable quantification of THC and its metabolites in oral fluid samples collected with the Greiner Bio-One Saliva Collection System is presented.

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Background: Short cementless stems in total hip arthroplasty have gained increasing popularity, yet on-going studies of many of these implants are lacking. The aim of this study was to evaluate the minimum 5 year clinical and radiological results of a short, highly porous, single-tapered-wedge cementless femoral implant.

Methods: A retrospective study of 281 hips in 256 patients who had a minimum 5-year follow-up and underwent primary total hip arthroplasty between 2010 and 2016 were evaluated.

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Efferocytosis is a process by which phagocytes remove dead or dying cells. It is considered anti-inflammatory, as the removal process reduces potential inflammatory molecules originating from dead cells and results in the reprogramming of macrophages to an anti-inflammatory state. However, engulfment of infected dead cells, deregulated phagocytosis and perturbed digestion of apoptotic bodies induce inflammatory signalling pathways during efferocytosis.

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