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Two cases of an atypical presentation of necrotizing stomatitis
Magan-Fernandez, Antonio,O'Valle, Francisco,Pozo, Elena,Liebana, Jose,Mesa, Francisco Korean Academy of Periodontology 2015 Journal of Periodontal & Implant Science Vol.45 No.6
Purpose: The purpose of this report was to describe the clinical and microbiological characteristics of two rare cases of necrotizing stomatitis, and the outcomes of a non-invasive treatment protocol applied in both cases. Methods: We report two cases of necrotizing stomatitis in a rare location in the hard palate of a 40-year-old woman and a 28-year-old man. Neither had a relevant medical history and both presented with highly painful ulceration in the palate and gingival margin that was accompanied by suppuration and necrosis. 3% hydrogen peroxide was applied to the lesions using sterile swabs, and antibiotic and anti-inflammatory treatment was prescribed to both patients in addition to two daily oral rinses of 0.2% chlorhexidine. Results: In both cases, radiological examination ruled out bone involvement, and exfoliative cytology revealed a large inflammatory component and the presence of forms compatible with fusobacteria and spirochetes. There was a rapid response to treatment and a major improvement was observed after 48 hours, with almost complete resolution of the ulcerated lesions and detachment of necrotic areas with partial decapitation of gingival papillae. Conclusions: Necrotizing periodontal lesions can hinder periodontal probing and the mechanical removal of plaque in some cases due to the extreme pain suffered by the patients. We present a non-invasive treatment approach that can manage these situations effectively.
Aspergillus ochraceus 와 다른 저장균간의 in vitro 상호작용 및 Niche Overlap 에 미치는 환경요인의 영향
Magan, Naresh,이향범,유승헌 한국균학회 1999 韓國菌學會誌 Vol.27 No.4
The effect of water activity (a_w, 0.9∼0.995) and temperature (18∼30℃) on in vitro growth and interactions between ochratoxin-producing Aspergillus ochraceus and six other fungi (Alternaria alternata, Aspergillus candidus, A. flavus, A. niger, Eurotium amstelodami, E. rubrum) isolated from maize grain were investigated. A. ochraceus and each six other species were paired and their interactions given a numerical score to obtain an index of dominance (I_D) for each species. Generally A. ochraceus was very competitive and dominant against other fungi. It was, however, dominanted by Alternaria alternata and A. niger at high a_w (0.995 a_w), and mutually antagonistic when paired with E. amstelodami and E. rubrum at low a_w (0.9 a_w). The growth rates of each species were also calculated under the same range of environmental conditions. They were markedly influenced by a_w and temperature. At high temperature (30℃), A. ochraceus grew most rapidly under slightly drier conditions (0.95 a_w), while A. alternata, A. flavus and A. niger did at high water availability level (0.995 a_w). At 18℃ and 25℃, and high a_w level (0.995 a_w), A. alternata grew fastest, while A. candidus, E. amstelodami and E. rubrum grew very slowly. Using Biolog plates the effect of a_w and temperature on utilization patterns of carbon sources in maize was evaluated. The niche overlap index (NOI) relative to A. ochraceus was determined and compared with that of each interacting species. Under high water available condition (0.995 a_w) the NOI of A. ochraceus was often $gt;0.9, indicative of the coexistence with other interacting species. However, against E. amstelodami and E, rubrum at 18℃, the species had NOI $lt;0.8, indicative of occupation of different niches. At low a_w (0.95 a_w), NOI for A. ochraceus was $lt;0.8 when paired with A. alternata and A. niger also suggested the occupation of different niches.
Two cases of an atypical presentation of necrotizing stomatitis
Antonio Magan-Fernandez,Francisco O’Valle,Elena Pozo,Jose Liebana,Francisco Mesa 대한치주과학회 2015 Journal of Periodontal & Implant Science Vol.45 No.6
Purpose: The purpose of this report was to describe the clinical and microbiological characteristicsof two rare cases of necrotizing stomatitis, and the outcomes of a non-invasivetreatment protocol applied in both cases. Methods: We report two cases of necrotizing stomatitis in a rare location in the hard palateof a 40-year-old woman and a 28-year-old man. Neither had a relevant medical historyand both presented with highly painful ulceration in the palate and gingival margin thatwas accompanied by suppuration and necrosis. 3% hydrogen peroxide was applied to thelesions using sterile swabs, and antibiotic and anti-inflammatory treatment was prescribedto both patients in addition to two daily oral rinses of 0.2% chlorhexidine. Results: In both cases, radiological examination ruled out bone involvement, and exfoliativecytology revealed a large inflammatory component and the presence of forms compatiblewith fusobacteria and spirochetes. There was a rapid response to treatment and amajor improvement was observed after 48 hours, with almost complete resolution of theulcerated lesions and detachment of necrotic areas with partial decapitation of gingivalpapillae. Conclusions: Necrotizing periodontal lesions can hinder periodontal probing and the mechanicalremoval of plaque in some cases due to the extreme pain suffered by the patients. We present a non-invasive treatment approach that can manage these situations effectively.
Minireviews : Environmental Factors and Bioremediation of Xenobiotics Using White Rot Fungi
( Naresh Magan ),( Silvia Fragoeiro ),( Catarina Bastos ) 한국균학회 2010 Mycobiology Vol.38 No.4
This review provides background information on the importance of bioremediation approaches. It describes the roles of fungi, specifically white rot fungi, and their extracellular enzymes, laccases, ligninases, and peroxidises, in the degradation of xenobiotic compounds such as single and mixtures of pesticides. We discuss the importance of abiotic factors such as water potential, temperature, and pH stress when considering an environmental screening approach, and examples are provided of the differential effect of white rot fungi on the degradation of single and mixtures of pesticides using fungi such as Trametes versicolor and Phanerochaete chrysosporium. We also explore the formulation and delivery of fungal bioremedial inoculants to terrestrial ecosystems as well as the use of spent mushroom compost as an approach. Future areas for research and potential exploitation of new techniques are also considered.
Sanchez-Fernandez, Elena,Magan-Fernandez, Antonio,O'Valle, Francisco,Bravo, Manuel,Mesa, Francisco Korean Academy of Periodontology 2020 Journal of Periodontal & Implant Science Vol.50 No.-
Purpose: This study investigated the effects of hyaluronic acid (HA) on peri-implant clinical variables and crevicular concentrations of the proinflammatory biomarkers interleukin (IL)-1β and tumor necrosis factor (TNF)-α in patients with peri-implantitis. Methods: A randomized controlled trial was conducted in peri-implantitis patients. Patients were randomized to receive a 0.8% HA gel (test group), an excipient-based gel (control group 1), or no gel (control group 2). Clinical periodontal variables and marginal bone loss after 0, 45, and 90 days of treatment were assessed. IL-1β and TNF-α levels in crevicular fluid were measured by enzyme-linked immunosorbent assays at baseline and after 45 days of treatment. Clustering analysis was performed, considering the possibility of multiple implants in a single patient. Results: Sixty-one patients with 100 dental implants were assigned to the test group, control group 1, or control group 2. Probing pocket depth (PPD) was significantly lower in the test group than in both control groups at 45 days (control 1: 95% CI, -1.66, -0.40 mm; control 2: 95% CI, -1.07, -0.01 mm) and 90 days (control 1: 95% CI, -1.72, -0.54 mm; control 2: 95% CI, -1.13, -0.15 mm). There was a trend towards less bleeding on probing in the test group than in control group 2 at 90 days (P=0.07). Implants with a PPD ≥5 mm showed higher levels of IL-1β in the control group 2 at 45 days than in the test group (P=0.04). Conclusions: This study demonstrates for the first time that the topical application of a HA gel in the peri-implant pocket and around implants with peri-implantitis may reduce inflammation and crevicular fluid IL-1β levels.
Mancino Fabio,Fontalis Andreas,Magan Ahmed,Plastow Ricci,Haddad Fares S. 대한고관절학회 2024 Hip and Pelvis Vol.36 No.1
Total hip arthroplasty (THA) is a frequently performed procedure; the objective is restoration of native hip biomechanics and achieving functional range of motion (ROM) through precise positioning of the prosthetic components. Advanced threedimensional (3D) imaging and computed tomography (CT)-based navigation are valuable tools in both the preoperative planning and intraoperative execution. The aim of this study is to provide a thorough overview on the applications of CT scans in both the preoperative and intraoperative settings of primary THA. Preoperative planning using CT-based 3D imaging enables greater accuracy in prediction of implant sizes, leading to enhancement of surgical workflow with optimization of implant inventory. Surgeons can perform a more thorough assessment of posterior and anterior acetabular wall coverage, acetabular osteophytes, anatomical landmarks, and thus achieve more functional implant positioning. Intraoperative CT-based navigation can facilitate precise execution of the preoperative plan, to attain optimal positioning of the prosthetic components to avoid impingement. Medial reaming can be minimized preserving native bone stock, which can enable restoration of femoral, acetabular, and combined offsets. In addition, it is associated with greater accuracy in leg length adjustment, a critical factor in patients’ postoperative satisfaction. Despite the higher costs and radiation exposure, which currently limits its widespread adoption, it offers many benefits, and the increasing interest in robotic surgery has facilitated its integration into routine practice. Conducting additional research on ultra-low-dose CT scans and examining the potential for translation of 3D imaging into improved clinical outcomes will be necessary to warrant its expanded application.