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https://www.readbyqxmd.com/read/29233700/volumetric-analysis-of-keratocystic-odontogenic-tumors-and-non-neoplastic-jaw-cysts-comparison-and-its-clinical-relevance
#1
Martin Kauke, Ali-Farid Safi, Andrea Grandoch, Hans-Joachim Nickenig, Joachim Zöller, Matthias Kreppel
The keratocystic odontogenic tumor (KCOT) is capable of causing vast osseous destruction. Histopathological examination is pivotal for diagnosis. The diagnostic process can sometimes be hindered by tissue inflammation of KCOTs with loss of defining criteria, resulting in misdiagnosis as an odontogenic jaw cyst. We discuss the possible merits of volumetric analysis when facing this particular diagnostic dilemma and for pathophysiological characterization of KCOTs. We included 114 patients, of whom 27 were histopathologically diagnosed with a KCOT and 87 with dentigerous (n = 41) and periapical cyst (n = 46)...
November 21, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29229314/an-atypical-odontogenic-myxoma
#2
L Benjelloun, N Cherradi, A Kessab, S Dghoughi
INTRODUCTION: Odontogenic myxoma is an uncommon tumor of the jaws, benign but locally invasive. It arises from the mesenchymal portion of the tooth germ. It has a variable non-specific clinical and radiological appearance, and may be confused with other lesions of the jaws. CASE REPORT: A patient aged 50 presented for a periodontal treatment. After routine retroalveolar x-rays, we noted a small limited radiolucency between the left mandibular canine and the left mandibular first premolar...
December 8, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29226086/fibroblasts-promote-the-collective-invasion-of-ameloblastoma-tumor-cells-in-a-3d-coculture-model
#3
Takao Fuchigami, Hirofumi Koyama, Michiko Kishida, Yoshiaki Nishizawa, Mikio Iijima, Toshiro Kibe, Masahiro Ueda, Tohru Kiyono, Yoshimasa Maniwa, Norifumi Nakamura, Shosei Kishida
Ameloblastoma is a benign tumor of the odontogenic epithelium with several histological subtypes. All subtypes of ameloblastoma contain abundant stroma; the tumor cells invade collectively into the surrounding tissues without losing intratumor cell attachments. However, the molecular mechanisms mediating ameloblastoma invasion remain unclear. Here, we evaluated the functional significance of the interactions between ameloblastoma tumor cells and stromal fibroblasts on collective cellular invasion using a three-dimensional cultivation method, double-layered collagen gel hemisphere (DL-CGH) culture...
December 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/29223396/accelerated-dentinogenesis-by-inhibiting-the-mitochondrial-fission-factor-dynamin-related-protein-1
#4
Yumiko Matsuishi, Hiroki Kato, Keiji Masuda, Haruyoshi Yamaza, Yuta Hirofuji, Hiroshi Sato, Hiroko Wada, Tamotsu Kiyoshima, Kazuaki Nonaka
Undifferentiated odontogenic epithelium and dental papilla cells differentiate into ameloblasts and odontoblasts, respectively, both of which are essential for tooth development. These differentiation processes involve dramatic functional and morphological changes of the cells. For these changes to occur, activation of mitochondrial functions, including ATP production, is extremely important. In addition, these changes are closely related to mitochondrial fission and fusion, known as mitochondrial dynamics...
December 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29214083/adenomatoid-odontogenic-tumor-associated-with-an-impacted-maxillary-lateral-incisor-a-case-report-with-five-year-follow-up
#5
Najwa Karam Genno, Nicole Aoun, Sami El Toum
Adenomatoid odontogenic tumor (AOT), a benign (hamartomatous) lesion of odontogenic origin, is an uncommon tumor which affects mainly females in the second decade. This lesion is most commonly associated with an impacted maxillary canine. This paper reported a case of AOT, in a 16-year-old female, associated with an impacted maxillary left lateral incisor. The evolution of this tumor was followed over 36 months and 24 months after excision.
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/29208801/grossing-of-oral-pathologies-revisited
#6
Raju Shashidara, Shankargouda Patil, Roopa S Rao, Ebi Scindiya, Ann Tryphena
Grossing pathologies, otherwise known as macroscopic cutup for diagnostic information, is a vital laboratory step as it impacts the patient treatment and prognosis. However, it is a challenging skill acquired with keen observation, experience, and correlation between macroscopy and microscopy. Before we make an attempt to gross, it is imperative to have sound knowledge about its general principles and its applications as it differs among different lesions. Thereby, we have made an attempt to enhance the guidelines for gross description and also updated on the general principles...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29208793/assessment-of-proliferative-potential-of-odontogenic-keratocyst-and-dentigerous-cyst-using-podoplanin-an-immunohistochemical-study
#7
Sandeep Gupta, Aparna Paliwal, Nidhi Choudaha, Anish Gupta, Prashant Rao, Shekhar Grover
INTRODUCTION: Odontogenic cysts are commonly encountered lesions among head and neck pathologies. Odontogenic keratocyst (OKC) has unique features of recurrence and local aggressiveness. Podoplanin (PDP) is a lymphatic endothelial marker and is shown to be expressed in a variety of tissues. Hence, we planned to assess the significance of PDP in OKC and dentigerous cyst (DC). MATERIALS AND METHODS: The present study included assessment of immunoexpression of PDP in OKC and DC...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29207829/evaluation-of-tumour-associated-macrophages-and-angiogenesis-in-ameloblastoma
#8
Akinyele O Adisa, Samuel E Udeabor, Anna Orlowska, Robert A Sader, Shahram Ghanaati
Introduction: Ameloblastoma is a locally invasive odontogenic neoplasm that has a high recurrence rate. The invasion of adjacent tissue is supported by angiogenesis stimulated by Tumour-Associated Macrophages (TAMs). TAMs are macrophages modified in the milieu of the tumour microenvironment and have very weak or no ability to present antigens. Thus, there is collaboration between the tumour and the tumour microenvironment to maintain tumour enlargement. TAMs exist as the classically activated M1 macrophages that possess antitumour activity and the otherwise activated M2 macrophages that support tumour invasion and metastasis...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29203744/differences-in-clinical-manifestations-of-odontogenic-and-non-odontogenic-lymphadenitis
#9
Pavlo I Tkachenko, Viitalina O Dobroskok, Nataliia M Korotych, Inna A Kolisnyk
INTRODUCTION: The acute suppurative lymphadenitis and its chronic forms prevail in the structure of inflammatory processes of the maxillofacial area in children. High incidence of the acute and chronic forms of lymphadenitis of both odontogenic and nonodontogenic origin is caused by the anotomophysiological peculiarities of the structure of the teeth and soft tissues in children in different age periods. THE AIM: The paper was aimed at comparison of clinical manifestations of the acute and chronic odontogenic and non-odontogenic lymphadenitis...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29201968/clinicopathologic-study-of-intra-osseous-lesions-of-the-jaws-in-southern-iranian-population
#10
Zohreh Jaafari-Ashkavandi, Behrooz Akbari
Statement of the Problem: It is necessary for surgeons and practitioners to know about relative incidence and clinicopathologic features of lesions for accurate diagnosis and approach of pathologic lesions. Data are limited about overall incidence of intra-osseous lesions of the jaws in Iranian patients. Purpose: This study evaluated the clinicopathologic features of intra- osseous lesions of the jaws in an Iranian population, in a 22-year period. Materials and Method: In this cross- sectional retrospective analytical study, 4500 specimens in a 22- year period were reviewed...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29199341/-expression-of-receptor-activator-of-nuclear-factor-%C3%AE%C2%BAb-ligand-in-keratocystic-odontogenic-tumor-before-and-after-decompression
#11
Bo Zhang, Wen-Cheng Ye, Ying Li, Xin-Mu Zhou, Yi-Ling Zhu
PURPOSE: To investigate the expression of receptor activator of nuclear factor-κB ligand (RANKL) in keratocystic odontogenic tumor (KCOT) before and after decompression. METHODS: Twenty two pairs of paraffin-embeded tissue specimens of KCOT were collected and subjected to immunohistochemical analysis of RANKL.The data were analyzed with SPSS17.0 software package for paired t test. RESULTS: RANKL positive cells were observed in the preoperative KCOT epithelium...
August 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29195058/essential-role-of-ift140-in-promoting-dentinogenesis
#12
G Li, M Liu, S Zhang, H Wan, Q Zhang, R Yue, X Yan, X Wang, Z Wang, Y Sun
Primary cilia, with highly regulated cellular sensory functions, play key roles in tissue development and function maintenance. Intraflagellar transport 140 (IFT140) is a subunit of IFT complex A, which is specialized for retrograde transportation in cilia. Mutations of Ift140 are usually associated with syndromic ciliopathy and may cause isolated diseases such as retinal dystrophy, short ribs, and polycystic kidney. However, the role of IFT140 in tooth development has not been well investigated. In this study, a close relationship between IFT140 and dentin formation is disclosed...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29191248/squamous-cell-carcinoma-arising-from-a-keratocystic-odontogenic-tumor-a-case-report
#13
Rajapakse Mudiyanselage Sumudu Himesha Bandara Medawela, Nadeena Sri Swarnaguptha Jayasuriya, Dugganna Ralalage Dilini Lalanthi Ratnayake, Ajith Manjula Attygalla, Bogahawatte Samarakoon Mudiyanselage Samadarani Siriwardena
BACKGROUND: The term "primary intraosseous squamous cell carcinoma" was introduced in 2005 by the World Health Organization with three subcategories. Squamous cell carcinoma arising from the lining of an odontogenic cyst is one important rare subcategory of such lesions with an incidence of 0.01 to 0.02%. Furthermore, the appearance of such malignancy in an odontogenic tumor such as keratocystic odontogenic tumor is considered extremely rare. CASE PRESENTATION: In this case report we report a case of a 50-year-old Sri Lankan woman who complained of pain and increase in the size of a swelling at the anterior mandible, which had been present for over 1 year...
December 1, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29189956/changes-of-mitochondrial-respiratory-function-during-odontogenic-differentiation-of-rat-dental-papilla-cells
#14
Fuping Zhang, Liulin Jiang, Yifan He, Wenguo Fan, Xiaoyan Guan, Qianyi Deng, Fang Huang, Hongwen He
Dental papilla cells (DPCs) belong to precursor cells differentiating to odontoblasts and play an important role in dentin formation and reproduction. This study aimed to explore the changes and and involvement of mitochondrial respiratory function during odontogenic differentiation. Primary DPCs were obtained from first molar dental papilla of neonatal rats and cultured in odontogenic medium for 7, 14, 21 days. DPCs, which expressed mesenchymal surface markers CD29, CD44 and CD90, had the capacity for self-renewal and multipotent differentiation...
November 30, 2017: Journal of Molecular Histology
https://www.readbyqxmd.com/read/29184830/orofacial-bacterial-infectious-diseases-an-update
#15
REVIEW
Soussan Irani
Objectives: Most of the oral infections with odontogenic origin are very common and can be treated by tooth extraction, endodontic therapy, or surgical treatment. Other infectious lesions are the manifestations of systemic diseases such as tuberculosis and syphilis. Skin and underlying subcutaneous tissue, fascia, or muscle is also involved with infectious diseases which range from superficial epidermal infections to very serious necrotizing fasciitis. Materials and Methods: An extensive literature in PubMed, Google Scholar, and Scopus search was performed from 1980 to 2017...
October 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29184770/dentinogenic-ghost-cell-tumor-a-rare-case-report-with-review-of-literature
#16
Yash Agrawal, Giridhar S Naidu, Ramanpal Singh Makkad, Ravleen Nagi, Supreet Jain, Dilip R Gadewar, Raman Kataria
Dentinogenic ghost cell tumors (DGCT) are very rare tumors considered as solid variants of calcifying epithelial odontogenic cysts (CEOC). They are locally invasive neoplasms and their main characteristic features are ameloblastoma like odontogenic epithelial proliferation, an aberrant keratinization in the form of ghost cells and dysplastic dentin. DGCT occur as two forms intraosseous (central) and extra osseous (peripheral), of which more aggressive intraosseous variety requires careful monitoring and aggressive local resection to prevent recurrence...
October 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184632/deep-neck-infection-after-third-molar-extraction-a-case-report
#17
Alberto Ferreira da Silva Junior, Gustavo Silvestre de Magalhaes Rocha, Camila Fialho da Silva Neves de Araujo, Ademir Franco, Rhonan Ferreira Silva
Deep neck infections are associated with high morbidity rates in dentistry. Early diagnosis and intervention play an essential part in decreasing morbidity rates. The present study aims to report a case of odontogenic deep neck infection after third molar extraction. A 51-year-old male patient underwent extraction of the mandibular right third molar. Seven days later, the patient developed symptoms and signs of progressive infection. Laboratorial and radiologic examinations in association with clinical investigations confirmed deep neck infection...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29177377/-epidermolysis-bullosa-in-peru-clinical-and-epidemiological-study-of-patients-treated-in-a-national-reference-pediatric-hospital-1993-2015
#18
Rosario Torres-Iberico, Patricia Palomo-Luck, Gilmer Torres-Ramos, Roxana Lipa-Chancolla
OBJECTIVES: To describe the clinical and epidemiological characteristics of patients diagnosed with epidermolysis bullosa (EB) at the Instituto Nacional de Salud (INSN) in Lima, Peru; a National Reference Center for this disease. MATERIALS AND METHODS: Observational, descriptive and transversal study. We reviewed the clinical histories and laboratory tests of patients diagnosed with EB treated in INSN from 1993 to 2015. RESULTS: 93 patients were registered...
April 2017: Revista Peruana de Medicina Experimental y Salud Pública
https://www.readbyqxmd.com/read/29177376/-detection-of-influenza-a-b-and-subtypes-a-h1n1-pdm09-a-h3n2-viruses-by-multiple-qrt-pcr-in-clinical-samples
#19
Pool Marcos, Maribel Huaringa, Nancy Rojas, Victoria Gutiérrez, Sila Ruiton, Emelda Gallardo, Jorge Achata, Marco Galarza
OBJECTIVES.: To describe the clinical and epidemiological characteristics of patients diagnosed with epidermolysis bullosa (EB) at the Instituto Nacional de Salud (INSN) in Lima, Peru; a National Reference Center for this disease. MATERIAL AND METHODS: . Observational, descriptive and transversal study. We reviewed the clinical histories and laboratory tests of patients diagnosed with EB treated in INSN from 1993 to 2015. RESULTS.: 93 patients were registered...
April 2017: Revista Peruana de Medicina Experimental y Salud Pública
https://www.readbyqxmd.com/read/29174862/clinical-implications-of-taste-thresholds-in-patients-with-odontogenic-maxillary-sinusitis
#20
T Tsuji, S Tanaka, Y Nishide, M Kogo, T Yamamoto
Patients with odontogenic maxillary sinusitis (OMS) often complain of reduced taste sensitivity as well as nasal obstruction. The filter paper disc method (the conventional gustatory test) was applied to nine patients who underwent sinus surgery to open the inferior nasal meatus and sinus drainage, on three different days: 1day prior to surgery, 7days postoperative, and 28days postoperative. The same test was applied to nine non-clinical participants with or without clipping the nose to interfere with smooth nasal airflow on two different days...
November 23, 2017: International Journal of Oral and Maxillofacial Surgery
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