Publications by authors named "Mortazavi S M J"

Purpose: Mobile-bearing total knee arthroplasty (MB-TKA) and fixed-bearing (FB) TKA are both widely used, with MB-TKA theoretically offering better functional outcomes due to its natural kinematics. This systematic review and meta-analysis aimed to compare joint awareness between MB-TKA and FB-TKA, as measured by Forgotten Joint Score-12 (FJS-12), to provide insights into patient-perceived outcomes.

Methods: A comprehensive literature search was conducted across major databases following PRISMA guidelines, without date or language restrictions.

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Background: Total knee arthroplasty (TKA) offers substantially improved function for patients with severe osteoarthritis, but long-term success can be overshadowed by aseptic loosening, a complication with a multifactorial etiology. This study aims to investigate the association between BMI and the rate of aseptic loosening and other complications in patients undergoing primary TKA.

Methods: This retrospective cohort study examined 354 TKA patients, evenly categorized by BMI (≤ 30 kg/m² and > 30 kg/m²).

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Background: Juvenile idiopathic arthritis (JIA) often results in significant bilateral hip damage, necessitating total hip arthroplasty (THA). Simultaneous bilateral THA offers potential advantages, particularly when executed via the Direct Anterior Approach (DAA). This study aims to assess the functional, radiological, and patient-reported outcomes, along with the complications of bilateral uncemented THA performed via DAA in patients with JIA.

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Introduction: This study presents the development and validation of a Deep Learning Convolutional Neural Network (CNN) model for estimating acetabular version (AV) from native hip plain radiographs.

Methods: Utilizing a dataset comprising 300 participants with unrelated pelvic complaints, the CNN model was trained and evaluated against CT-Scans, considered the gold standard, using a 5-fold cross-validation.

Results: Notably, the CNN model exhibited a robust performance, demonstrating a strong Pearson correlation with CT-Scans (right hip: = 0.

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Article Synopsis
  • The search for extraterrestrial intelligence (SETI) poses ethical and safety concerns, especially regarding how to communicate with alien civilizations.
  • Notable physicist Stephen Hawking warned that reaching out to extraterrestrials could be dangerous for humanity, highlighting the unpredictability of their intentions.
  • The debate around initiating contact is complex, involving a balance between scientific curiosity and safety, and raises questions about cognitive biases, as suggested by the "Intelligence Trap" concept.
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  • - Kaplan fibers (KFs) play a crucial role in knee stability, especially on the anterolateral side, influencing knee joint mechanics and rotational stability across different populations.
  • - MRI is highlighted as a key diagnostic tool for identifying KFs and their injuries, with ongoing research needed to develop accurate criteria and explore the relationship between KF injuries and ACL ruptures.
  • - The review discusses lateral extra-articular tenodesis (LET) techniques post-ACL reconstruction, particularly the modified Lemaire technique, which effectively reduces knee instability, underscoring the importance of further research on KF healing and LET efficacy.
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Backgrounds: Septic arthritis is a dangerous disease that occurs when microorganisms enter synovial fluid. It needs fast and accurate management; otherwise, it can harm the patient's life. Currently, the tests measure WBC and PMN in SF, so we hypothesized to use a proxy that is easier and faster to measure.

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Purpose: To validate and assess the cross-sectional adaptation of the modified Cincinnati knee rating system (MCRKS) Persian translation.

Methods: To assess test-pretest reliability, 102 participants were asked to fill out the MCRKS (Per) scale after anterior cruciate ligament (ACL) reconstruction surgery. Internal consistency (Cronbach's ), reliability (intraclass correlation coefficients), construct validity (Pearson's ) and sensitivity (floor/ceiling effect) were determined.

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Background: Severe forms of developmental dysplasia of the hip (DDH) in adulthood often lead to total hip arthroplasty (THA). This study aimed to evaluate the mid-term to long-term outcomes of THA in Crowe type IV DDH cases, which represent a technically challenging and complex patient group.

Methods: PubMed, EMBASE, Web of Science, and Scopus were searched for observational studies and case series with over 100 months of mean follow-up on adult patients who had Crowe type IV DDH treated with THA.

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Article Synopsis
  • A study by the NIH indicates that lung cancer is more common in never-smoked women, appearing at a younger age compared to smokers.
  • The increase in lung cancer among female non-smokers may be linked to radon exposure, which differs by gender due to varying indoor and outdoor activity levels.
  • As smoking rates decline, other risk factors like radon are becoming more significant, necessitating further research to understand their impact on lung cancer and public health.
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  • The study assessed patients' joint perception (PJP) as a measure of outcomes after anterior cruciate ligament reconstruction (ACLR) by comparing it to other patient-reported outcome measures (PROMs).
  • A retrospective analysis of 108 ACLR patients revealed strong correlations between PJP and various established PROMs, indicating PJP's reliability and validity in evaluating patient outcomes post-surgery.
  • The findings suggest that PJP may serve as a valuable assessment tool, with about 20% of participants reporting a perception of their joint functioning as "natural."
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Background: Hip hemiarthroplasty (HA) and total hip arthroplasty (THA) are common treatments for femoral neck fractures in elderly patients. Despite HA's advantages of shorter operative times, less blood loss, and lower initial costs compared to primary THA, it may lead to conversion THA (cTHA). Our objectives are to evaluate the impact of conversion from HA to THA on Harris hip scores (HHS), compare complication rates between cTHA, revision THA, and primary THA, and assess the rates and types of complications following cTHA.

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Background: Obesity rates have been increasing globally, leading to a higher incidence of knee osteoarthritis and a surge in primary and revision total knee arthroplasty (TKA). The debate continues on the impact of obesity on TKA success, particularly regarding the use of stemmed tibial components in obese patients. This systematic review aimed to compare the effectiveness of stemmed tibial components versus standard keeled tibial components in obese patients undergoing TKA.

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Background: Medial tibial defects are common in patients who underwent primary total knee arthroplasty for varus deformity. Previous clinical studies have categorized tibial defects according to the depth of the defects and recommended different ways of addressing them. This study aimed to perform a biomechanical FE analysis to investigate the role of depth and surface area of the medial tibial plateau defects in the stability of the tibial component in primary TKA implants.

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Professor John Roderick Cameron (1922-2005) stands out as a trailblazer in the field of medical physics, whose innovative work has deeply influenced radiation protection and the broader medical radiation field through sound technical judgment and insight. Best known for inventing the bone densitometry device, his pioneering efforts have reshaped modern medical practices far beyond his initial breakthroughs. Cameron's explorations extended into the realms of space biomedical science and models of terrestrial radiation, areas where his insights continue to resonate today.

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Research conducted over the years has established that artificial light at night (ALAN), particularly short wavelengths in the blue region (~400-500 nm), can disrupt the circadian rhythm, cause sleep disturbances, and lead to metabolic dysregulation. With the increasing number of people spending considerable amounts of time at home or work staring at digital screens such as smartphones, tablets, and laptops, the negative impacts of blue light are becoming more apparent. While blue wavelengths during the day can enhance attention and reaction times, they are disruptive at night and are associated with a wide range of health problems such as poor sleep quality, mental health problems, and increased risk of some cancers.

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Radiation protection is an essential issue in diagnostic radiology to ensure the safety of patients, healthcare professionals, and the general public. Lead has traditionally been used as a shielding material due to its high atomic number, high density, and effectiveness in attenuating radiation. However, some concerns related to the long-term health effects of toxicity, environmental disease as well as heavy weight of lead have led to the search for alternative lead-free shielding materials.

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