Publications by authors named "Arnaud Dubory"

Objective: This study aimed to determine which pedagogic method, online workshops or live medical education, was the better way to teach about self-medication for middle school students.

Methods: The following groups were formed: group O (students receiving online education), group L (students participating in live medical education animated by a medical practitioner and a science teacher) and group C (students without any medical learning). To compare them, the students answered three multiple choice questions before and after the educational intervention.

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Purpose: The dual mobility cup (DMC) reduces the dislocation rates in total hip arthroplasty (THA). DMC systems include anatomical (non-modular or monoblock) (ADM) and modular dual mobility (MDM) components (Stryker Orthopaedics, Mahwah, NJ, USA). This review aims to assess differences between these two types of DMC implants concerning dislocation and revision rates, as well as patient-reported outcomes.

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To assess the immediate and six-month follow-up effects of medical education simultaneously provided by a practitioner and a science teacher on middle school students regarding self-medication and knowledge of the healthcare system. Two groups were constituted: the learning group (L group), with students receiving an interactive medical education, and the control group (C group), which included students without medical education. Both groups were evaluated by using a six-multiple choice question (MCQ) evaluation form: three times for L group - just before the medical workshop (T0), immediately after the medical workshop (T1) and at six-month follow-up after the medical workshop (T2) - and only the evaluation at T0 for students in C group.

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Background: Uncemented femoral stem insertion into the bone is achieved by applying successive impacts on an inserter tool called "ancillary". Impact analysis has shown to be a promising technique to monitor the implant insertion and to improve its primary stability.

Method: This study aims to provide a better understanding of the dynamic phenomena occurring between the hammer, the ancillary, the implant and the bone during femoral stem insertion, to validate the use of impact analyses for implant insertion monitoring.

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Background: There is no clear census as to which operative technique provides better recovery for radial nerve injuries. Therefore, in this systematic review, we examined the functional recovery, patient-reported outcomes, and complications of tendon transfer (TT) and nerve transfer (NT).

Methods: Five electronic databases were searched for studies (>10 cases per study) comparing NT and TT regardless of the study design (observational or experimental).

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Purpose: The aim of this study was to compare two percutaneous pedicle fixations for the treatment of thoracolumbar fractures: one associating a jack kyphoplasty (SpineCut) and the other using intermediate screws (Trident).

Methods: All adult patients treated for single-level Magerl/AO type A thoracolumbar traumatic fractures in four orthopaedic departments, with SpineCut or Trident, with a one year minimum follow-up, were retrospectively included. Neurological disorders and osteoporotic fractures were not included.

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Context: Diaphyseal tibiofibular synostosis (DTS) is a rare pathology with unknown origin especially occurring in intensive sport athletes. No therapeutic guideline has been well established in the literature.

Case Presentation: A rare case of DTS in a 26-year-old professional rugby player has been described.

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Background: Spinal metastases (SpMs) from thyroid cancers (TC) significantly reduce quality of life by causing pain, neurological deficits in addition to increasing mortality. Moreover, prognosis factors including surgery remain debated.

Methods: Data were stored in a prospective French national multicenter database of patients treated for SpM between January 2014 and 2017.

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Article Synopsis
  • The study looked at how well different scoring systems predict survival for patients with spine metastasis (SPM) and found that they often underestimate how long patients actually live after diagnosis.
  • Out of the scores tested, the Tokuhashi score was the best at predicting survival, while the Tomita score performed the worst with much less accuracy.
  • The findings suggest that doctors shouldn't rely only on these scoring systems for treatment decisions; they should also consider each patient's symptoms and other important factors.
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  • Primary stability is essential for the success of cementless implants, yet quantifying it in real-life situations is challenging due to the complexities of bone interactions during implant insertion.
  • This study aims to analyze how different parameters like bone stiffness, interference fit, and friction at the bone-implant interface affect the primary stability of acetabular cup implants.
  • By simulating the insertion process with a 3D model, findings indicate that lower friction and smaller interference fit improve implant stability, offering guidelines for tailoring implants to individual bone conditions for better long-term outcomes.
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Objective: Rheumatoid arthritis (RA) is a risk factor of lumbar spine surgical failure. The interest of anterior lumbar fusion in this context remains unknown. This retrospective study aimed to compare the outcome of anterior-only fusions between RA patients and non-RA (NRA) patients to treat lumbar spine degenerative disorders.

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Purpose: Corticoid treatment associated with haematologic treatments can lead to ankle osteonecrosis in children's survivors of acute leukemia (ALL). Based on the efficiency of mesenchymal stem cells (MSCs) in hip osteonecrosis, we performed an evaluation of this treatment in 51 children and adolescents who had symptomatic ankle osteonecrosis after therapy for haematologic cancer.

Material And Methods: The 51 patients had a total of 79 osteonecrosis sites on MRI, with 29 talus sites, 18 metaphyseal tibia sites, 12 epiphyseal tibia sites, eight calcaneus sites, six fibula sites, four navicular sites, and two cuboid sites.

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Introduction: Open fractures are at risk of nonunion; surgeons are reluctant to propose early standard bone grafting after open fractures, preferring to wait in order to adequately assess the facture status of infection. Bone marrow contains mesenchymal stem cells (MSCs) and granulocyte and macrophage precursors identified in vitro as colony forming units-granulocyte macrophage (CFU-GM), both of which have a prophylactic action against infection. We therefore tested the hypothesis that early injection of bone marrow concentrate would be useful in these fractures.

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The incidence of spinal metastasis (SpM) is increasing, and life expectancy for patients with malignancy is also rising. The "elderly" represent a population with steady growth in SpM proportion. Bracing is associated with lower survival.

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The prognosis of sickle cell disease (SCD) has greatly improved in recent years, resulting in an increased number of patients reporting musculoskeletal complications such as osteonecrosis of the femoral head. Total hip arthroplasty (THA) can be utilized to alleviate the pain associated with this disease.Although it is well known that hip arthroplasty for avascular necrosis (AVN) in SCD may represent a challenge for the surgeon, complications are frequent, and no guidelines exist to prevent these complications.

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Article Synopsis
  • This study looks at patients with prostate cancer that has spread to their spine, called spine metastasis (SpM), to see how long they might live after that.
  • They found that on average, patients survived for about 28.8 months after developing SpM.
  • Important factors that help predict longer survival include having a good health status and receiving radiation treatment specifically for the spine, while having certain types of spine lesions could also affect survival time.
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Purpose: There is an increasing number of reports on the treatment of knee osteoarthritis (OA) using mesenchymal stem cells (MSCs). However, it is not known what would better drive osteoarthritis stabilization to postpone total knee arthroplasty (TKA): targeting the synovial fluid by injection or targeting on the subchondral bone with MSCs implantation.

Methods: A prospective randomized controlled clinical trial was carried out between 2000 and 2005 in 120 knees of 60 patients with painful bilateral knee osteoarthritis with a similar osteoarthritis grade.

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Background: The success of cementless hip arthroplasty depends on the primary stability of the femoral stem. It remains difficult to assess the optimal number of impacts to guarantee the femoral stem stability while avoiding bone fracture. The aim of this study is to validate a method using a hammer instrumented with a force sensor to monitor the insertion of femoral stem in bovine femoral samples.

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The success of cementless hip arthroplasty depends on the primary stability of the femoral stem (FS). It remains difficult to assess the optimal impaction energy to guarantee the FS stability while avoiding bone fracture. The aim of this study is to compare the results of a method based on the use of an instrumented hammer to determine the insertion endpoint of cementless FS in a cadaveric model with two other methods using i) the surgeon proprioception and ii) video motion tracking.

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Purpose: With advances in technology and particularly locked screws, patients with high tibial osteotomy (HTO) are frequently allowed full weight bearing for a  unilateral procedure. We are aware of no reports comparing the safety of a simultaneous bilateral HTO with staged bilateral HTO. The purpose of this study was to retrospectively compare these two strategies.

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Article Synopsis
  • L5-S1 anterior lumbar interbody fusion (ALIF) is often effective for degenerative disc disease, but its use for isthmic spondylolisthesis is debated; this study seeks to pinpoint risk factors for instrumentation failure and pseudarthrosis in this context.
  • Out of 64 patients, 18.8% experienced instrumentation failure and 10.9% had pseudarthrosis, with significant associations found between failure and factors like isthmic spondylolisthesis, pelvic incidence, and cage height.
  • The study concluded that isthmic spondylolisthesis and a high pelvic incidence may increase the risk of instrumentation failure during stand-alone L5-S1 ALIF, although no
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Purpose: The nutritional basis for rickets was described between 1880 and 1915, at the same period of discovery of other "vital substances" or vitamins. In contrast, rickets could also be prevented or cured by sunshine. But as the capacity to produce vitamin D depends on exposure to ultraviolet B rays (UVB) from sunlight or artificial sources, vitamin D became one of the most frequently used "drugs" in the twentieth century to compensate for insufficient exposure to UVB of humans.

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Purpose: After Glisson's description of rickets, it took two centuries to realize that rickets was due to the absence of antirachitic nutrients in the diet or lack exposure of the skin to ultraviolet rays. This bone disease caused by vitamin D deficiency was one of the most common diseases of children 100 years ago. This paper explores how the definition, diagnosis, and treatment of rickets shifted in the first decades of the twentieth century.

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Purpose: Osteonecrosis is a rare event during or after pregnancy. Due to the low number of cases, there is no report of long-term results after conservative surgery in this population.

Method: From 1992 to 2010, 145 consecutive female patients with unilateral symptomatic (94 stage I and 51 stage II) left hip osteonecrosis (ON) related to pregnancy were treated between 4 and 16 months after delivery with percutaneous mesenchymal stem cell (MSC) injection obtained from bone marrow concentration.

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