Publications by authors named "Mathilde Fenelon"

Innovative biomaterials are increasingly being investigated for guided bone regeneration (GBR) in oral and maxillofacial surgery. However, the development of relevant preclinical models still need to be consiedered. This study aimed to propose a standardized and reproducible maxillary bone defect model in rats that could be relevant to evaluate new materials for GBR.

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Study Objectives: Objective sleepiness is an important outcome requiring rigorous evaluation regarding obstructive sleep apnea (OSA) treatment efficacy, but no systematic review has explored the efficacy of advancement treatments of the stomatognathic system (ie, mandibular advancement device [MAD], hypoglossal nerve stimulation, and maxillomandibular advancement surgery) on objective sleepiness in OSA.

Methods: We conducted a systematic review of the literature using PubMed, Scopus, and Web of Science databases. All clinical studies assessing the efficacy of advancement treatments of the stomatognathic system on objective sleepiness in adults with OSA by the Maintenance of Wakefulness Test, the Multiple Sleep Latency Test, the Oxford Sleep Resistance Test, the Psychomotor Vigilance Task, or the Sustained Attention to Response Task were included.

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Thanks to its unique biological properties, the human amniotic membrane (AM) has shown promising results for guided bone regeneration (GBR), but displays some limitations such as poor space-maintaining ability. This study thus aimed to develop a new amnion/chorion membrane (ACM), with better mechanical properties as well as comparable or improved biological properties for GBR. We first developed a new decellularization method of ACM (DL-ACM) which was validated by DNA staining and quantification, and its cytocompatibility was established in vitro.

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Human amniotic membrane (hAM) has been extensively used for several decades as a bioactive scaffold for regenerative medicine. In its cryopreserved form-one of the main storage formats-the presence of viable cells has often been questioned. Furthermore, there is little published evidence of the role of endogenous amniotic cells from cryopreserved hAM in tissue repair.

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Cemento-osseous dysplasia (COD) is a benign fibro-osseous pathology in which fibrous connective tissues, osteoid and cementum-like materials, replace bone. Concerning the hypovascularization and increased mineralization of bone that occurs in these patients, the clinician may face 2 types of problems: infectious complications, such as osteomyelitis, and increased implant failure. The present study aims to report the successful and innovative management of a COD patient complicated by mandibular osteomyelitis and the implant rehabilitation of this area.

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Article Synopsis
  • The study aimed to explore how to manage patients with inherited bleeding disorders during oral surgery and assess the link between surgical type and bleeding complications.
  • The research analyzed data from 83 patients with various bleeding disorders who underwent different types of oral surgery from 2014 to 2021, revealing that 14.5% experienced bleeding complications, predominantly from osseous surgeries.
  • The findings suggest that while bleeding issues occurred, they were manageable; however, a serious case highlights the need for careful preoperative planning to evaluate risks and benefits.
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Pre-implant bone surgery in oral surgery allows to reconstruct maxillary atrophies related to traumatic, infectious or tumoral processes. In this context, the ideal biomaterial remains autogenous bone, but biomaterials (of natural or synthetic origin) allow to limit the morbidity linked to bone harvesting, and to simplify these surgical procedures. In this article, we illustrate how 3D printing technologies can be used as an adjuvant to treat bone defects of complex shape or to create anatomical models used to plan interventions.

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  • The study focused on developing pullulan and dextran-based membranes for guided bone regeneration (GBR) in oral surgery, testing their potential as barrier membranes.
  • Two types of these membranes, one with hydroxyapatite (HA) and one without, were evaluated for their cytotoxicity and biocompatibility using human stem cells and a rat model.
  • Results showed that the HA-containing membrane significantly enhanced bone formation compared to a commercial collagen membrane, indicating its promise for improving GBR outcomes.
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  • The amniotic membrane (AM), a key component of the fetal placenta, is rich in stem cells and growth factors, making it an affordable and effective option for treating corneal and skin wounds.
  • Recent advancements in hybrid materials have led to the development of multilayer composite membranes that combine AMs with other materials for enhanced tissue engineering applications, particularly in nerve regeneration.
  • The review discusses the benefits of additive manufacturing and electrospinning techniques in creating these membranes and provides suggestions for improving their biological and mechanical properties.
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  • Osteomyelitis of the jaw (OMJ) remains a difficult condition for surgeons to treat, despite advancements in understanding its diagnosis and treatment.
  • A study reviewed 20 years of medical records of patients with OMJ to identify risk factors linked to severe forms of the disease and major complications.
  • Key findings indicated that lifestyle factors like smoking and alcohol use, as well as malnutrition, increased complication risks, while dental implant-related OMJ was noted as a more aggressive type, and certain clinical signs could help predict treatment outcomes.
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The last 18 years have brought an increasing interest in the therapeutic use of perinatal derivatives (PnD). Preclinical studies used to assess the potential of PnD therapy include a broad range of study designs. The COST SPRINT Action (CA17116) aims to provide systematic and comprehensive reviews of preclinical studies for the understanding of the therapeutic potential and mechanisms of PnD in diseases and injuries that benefit from PnD therapy.

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Background: Three-dimensional (3D) printing is now a widely recognized surgical tool in oral and maxillofacial surgery. However, little is known about its benefits for the surgical management of benign maxillary and mandibular tumors and cysts.

Purpose: The objective of this systematic review was to assess the contribution of 3D printing in the management of benign jaw lesions.

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Medication-related osteonecrosis of the jaw (MRONJ) is a complication caused by anti-resorptive agents and anti-angiogenesis drugs. Since we wanted to write a protocol for a randomized clinical trial (RCT), we reviewed the literature for the essential information needed to estimate the size of the active patient population and measure the effects of therapeutics. At the same time, we designed a questionnaire intended for clinicians to collect detailed information about their practices.

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Perinatal tissues, such as placenta and umbilical cord contain a variety of somatic stem cell types, spanning from the largely used hematopoietic stem and progenitor cells to the most recently described broadly multipotent epithelial and stromal cells. As perinatal derivatives (PnD), several of these cell types and related products provide an interesting regenerative potential for a variety of diseases. Within COST SPRINT Action, we continue our review series, revising and summarizing the modalities of action and proposed medical approaches using PnD products: cells, secretome, extracellular vesicles, and decellularized tissues.

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Article Synopsis
  • The study wanted to find out how much dental students in six European countries know about oral potentially malignant disorders (OPMDs) and how they feel about learning more.
  • The researchers gave an online questionnaire to final-year dental students to assess their knowledge, clinical experience, and preferences for future education on OPMDs.
  • Results showed that while many students learned about OPMDs in school, not all had hands-on experience with patients, and there were gaps in their knowledge that need to be filled with more educational resources.
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  • MRONJ is a serious complication linked to treatments like bisphosphonates and lacks established management guidelines, especially in advanced cases.
  • The human amniotic membrane (hAM) offers various healing benefits, such as low immunogenicity and properties that support tissue regeneration and reduce inflammation.
  • In a study with eight cancer patients suffering from stage 2-3 MRONJ, using cryopreserved hAM resulted in significant healing improvements, pain relief, and no adverse events, with 80% showing healing at the six-month follow-up.
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  • Due to poor performance of synthetic vascular prostheses in small-diameter revascularization, researchers are developing biological substitutes using the human amniotic membrane (HAM) as a cost-effective alternative.
  • The study outlines a new method for producing vascular grafts by twisting HAM into threads, with results showing that the physical and mechanical properties of these threads can be easily adjusted.
  • Testing revealed that gamma irradiation and decellularization did not affect the HAM's ability to support blood vessel formation, making it a promising option for creating allogeneic, small-diameter tissue-engineered vascular grafts without expensive production methods.
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  • Bone tissue engineering (BTE) is being studied to find better alternatives to current bone substitutes and enhance bone regeneration.
  • This systematic review evaluated pullulan and dextran, two natural polysaccharides, as effective biomaterials in BTE by analyzing 28 relevant studies.
  • Various strategies, such as fabrication processes and the addition of bioactive elements, were identified to improve the bone regeneration capacity of these polysaccharide-based materials, along with their advantages and limitations.
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  • Oral submucous fibrosis (OSF) is a chronic condition that affects the mouth and throat, and has a potential risk for becoming cancerous.
  • The authors analyzed literature from 1956 to 2021 to calculate the overall malignant transformation rate (MTR), finding a 6% risk of malignancy across various studies.
  • The study highlighted significant differences in malignancy rates based on ethnicity, with Pakistan showing the highest risk (27%), while the results indicated a need for further research to explore these discrepancies among different groups.
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Due to its intrinsic properties, there has been growing interest in human amniotic membrane (hAM) in recent years particularly for the treatment of ocular surface disorders and for wound healing. Herein, we investigate the potential use of hAM and amnion-chorion membrane (ACM) in oral surgery. Based on our analysis of the literature, it appears that their applications are very poorly defined.

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An important component of tissue engineering (TE) is the supporting matrix upon which cells and tissues grow, also known as the scaffold. Scaffolds must easily integrate with host tissue and provide an excellent environment for cell growth and differentiation. Human amniotic membrane (hAM) is considered as a surgical waste without ethical issue, so it is a highly abundant, cost-effective, and readily available biomaterial.

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Thanks to their biological properties, amniotic membrane (AM), and its derivatives are considered as an attractive reservoir of stem cells and biological scaffolds for bone regenerative medicine. The objective of this systematic review was to assess the benefit of using AM and amniotic membrane-derived products for bone regeneration. An electronic search of the MEDLINE-Pubmed database and the Scopus database was carried out and the selection of articles was performed following PRISMA guidelines.

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  • The study explores the use of the human amniotic membrane (HAM) combined with a calcium phosphate cement (CPC) scaffold as a potential single-step alternative to the traditional two-step Masquelet induced membrane (IM) technique for treating critical bone defects.
  • It involves experiments in vitro and in vivo, demonstrating that the CPC scaffold supports stem cell growth and osteodifferentiation, leading to effective bone healing in a rat model.
  • Results indicated no significant advantage of using HAM membranes in addition to the CPC/BMP2 scaffold, as the single-step method achieved satisfactory bone regeneration comparable to the two-step procedure.
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