Imaging features of Stafne bone defects on computed tomography: An assessment of 40 cases

Morita, Lucas,Munhoz, Luciana,Nagai, Aline Yukari,Hisatomi, Miki,Asaumi, Junichi,Arita, Emiko Saito Korean Academy of Oral and Maxillofacial Radiology 2021 Imaging Science in Dentistry Vol.51 No.1

Purpose: This study was performed to assess and describe the imaging features of 40 cases of Stafne bone defects (SBDs) on computed tomographic (CT) examinations. Materials and Methods: This study collected data, including age and sex, from 40 patients with SBDs who underwent CT exams. The imaging features of the SBDs were assessed in terms of their location, average size, the relationship of their contour with the cortical plate of the lingual mandible, bone margins, degree of internal density, shape, topographic relationship between the defect and the mandibular edge, the distance from the SBD to the base of the mandible, and the Ariji classification (type I, II, and III). Results: The average age was 57.3 years(range, 28-78 years), and the patients were predominantly male (70%). In all cases (100%), the posterior unilateral lingual SBD variant was observed. Within the Ariji classification, type I was the most common (60%). Among the most frequently observed radiographic characteristics were thick sclerotic bone margin across the entire defect contour, completely hypointense internal content, an oval shape, and continuity with the mandibular base with discontinuity of the mandibular edge. Conclusion: This study showed that posterior SBDs could present with an oval or rounded shape, complete hypodensity, and thick sclerotic margins. Likewise, SBDs could appear almost anywhere, with minor differences from the classic SBD appearance. It is fundamental for dental practitioners to know the imaging features of SBDs, since they are diagnosed primarily based on imaging.

Histone deacetylase inhibitors promote neurosteroid-mediated cell differentiation and enhance serotonin-stimulated brain-derived neurotrophic factor gene expression in rat C6 glioma cells

Morita, Kyoji,Gotohda, Takako,Arimochi, Hideki,Lee, Mi-Sook,Her, Song Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of neuroscience research Vol.87 No.11

<P>Progesterone treatment has previously been reported to promote the differentiation of glial cells probably through the production of 5α-reduced neurosteroids, resulting in the enhancement of serotonin-stimulated brain-derived neurotrophic factor (BDNF) gene expression, which is considered to contribute to the survival, regeneration, and plasticity of neuronal cells in the brain and hence has been suggested to improve mood disorders and other symptoms in depressive patients. Based on these previous observations, the effects on glial cells of histone deacetylase (HDAC) inhibitors, which are known as agents promoting cell differentiation, were examined using rat C6 glioma cells as a model for in vitro studies. Consequently, trichostatin A (TSA), sodium butyrate (NaB), and valproic acid (VPA) stimulated glial fibrillary acidic protein (GFAP) gene expression, and their stimulatory effects on GFAP gene expression were inhibited by treatment of these cells with finasteride, an inhibitor of the enzyme producing 5α-reduced neurosteroids. In addition, HDAC inhibitors enhanced serotonin-stimulated BDNF gene expression, the enhancement of which could be abolished by the inhibition of 5α-reduced neurosteroid production in the glioma cells. These results suggest that HDAC inhibitors may be able to promote the differentiation of rat C6 glioma cells through the production of 5α-reduced neurosteroids, resulting in the enhancement of serotonin-stimulated BDNF gene expression as a consequence of promoting their differentiation, indicating the possibility that differentiated glial cells may be implicated in preserving the integrity of neural networks as well as improving the function of neuronal cells in the brain. © 2009 Wiley-Liss, Inc.</P>

고령자 泌尿障碍 진료포인트

Morita Takasi,Sugiyama Takahide 한국의학사 1999 診斷과治療 Vol.19 No.8

Is Arthroscopic Shoulder Surgery Really Low-invasive?

Morita W,Tasaki A,Hoshikawa Y 대한견주관절의학회 2009 대한견주관절학회 학술대회논문집 Vol.2009 No.5

Polymeric Gel Electrolytes for Electric Double Layer Capacitors

Morita, Masayuki,Qiao, Jin-Li The Korean Electrochemical Society 2003 한국전기화학회지 Vol.6 No.2

Proton conducting polymeric gels as the electrolytes of electrochemical capacitors have been prepared by two different methods: 1) swelling a polymethacrylate-based polymer matrix in aqueous solutions of inorganic and organic acids, and 2) polymerizing complexes of anhydrous acids and prepolymers with organic plasticizer. The FT-IR spectra strongly suggest that the carbonyl groups in the polymer matrix interact with protons from the doped acids. High ionic (proton) conductivity in the range of $6\times10^{-4}-4\times10^{-2}\;S\;cm^{-1}$ was obtained at room temperature for the aqueous gels. The non-aqueous polymer complexes showed rather low ionic conductivity, but it was about $10^{-3}\;S\;cm^{-1}\;at\;70^{\circ}C$ for the $H_3PO_4$ doped polymer electrolyte. The mechanisms of ion (proton) conduction in the polymeric systems are discussed.

A distinct functional distribution of α and γ motoneurons in the rat trigeminal motor nucleus

Morita-Isogai, Yukako,Sato, Hajime,Saito, Mitsuru,Kuramoto, Eriko,Yin, Dong Xu,Kaneko, Takeshi,Yamashiro, Takashi,Takada, Kenji,Oh, Seog Bae,Toyoda, Hiroki,Kang, Youngnam Springer-Verlag 2017 BRAIN STRUCTURE AND FUNCTION Vol.222 No.7

<P>Gamma-motoneurons (gamma MNs) play a crucial role in regulating isometric muscle contraction. The slow jaw-closing during mastication is one of the most functional isometric contractions, which is developed by the rank-order recruitment of alpha-motoneurons (alpha MNs) in a manner that reflects the size distribution of alpha MNs. In a mouse spinal motor nucleus, there are two populations of small and large MNs; the former was identified as a population of gamma MNs based on the positive expression of the transcription factor estrogen-related receptor 3 (Err3) and negative expression of the neuronal DNA-binding protein NeuN, and the latter as that of alpha MNs based on the opposite pattern of immunoreactivity. However, the differential identification of alpha MNs and gamma MNs in the trigeminal motor nucleus (TMN) remains an assumption based on the size of cell bodies that were retrogradely stained with HRP. We here examined the size distributions of alpha MNs and gamma MNs in the dorsolateral TMN (dl-TMN) by performing immunohistochemistry using anti-Err3 and anti-NeuN antibodies. The dl-TMN was identified by immunopositivity for vesicular glutamate transporter-1. Immunostaining for choline acetyltransferase and Err3/NeuN revealed that the dl-TMN is composed of 65% alpha MNs and 35% gamma MNs. The size distribution of alpha MNs was bimodal, while that of gamma MNs was almost the same as that of the population of small alpha MNs , suggesting the presence of alpha MNs as small as gamma MNs. Consistent with the size concept of motor units, the presence of smaller jaw-closing alpha MNs was coherent with the inclusion of jaw-closing muscle fibers with smaller diameters compared to limb muscle fibers.</P>

Structure and Function of Rice Root System as a Basis for Sustainable Agriculture

Morita Shigenori,Abe Jun 한국작물학회 2005 한국작물학회 학술발표대회 논문집 Vol.2005 No.-

Possible relation of hemin-induced HO-1 expression to the upregulation of VEGF and BDNF mRNA levels in rat C6 glioma cells.

Morita, Kyoji,Lee, Mi-Sook,Her, Song Birkhäuser Boston 2009 Journal of molecular neuroscience Vol.38 No.1

<P>Glial cells are generally considered to contribute to retaining the integrity of neural function through the protection of neuronal cells against neurodegenerative insults and also expected to play a potential role in the protection of cerebrovascular systems from various toxic insults of hemorrhaged blood, thus proposing a possible implication of glial cells in the recovery of brain function from the damage caused by cerebral hemorrhage. Based on this hypothetical idea, the direct effect of hemin on the expression of genes encoding heme oxygenase-1 (HO-1), vascular endothelial growth factor (VEGF), and brain-derived neurotrophic factor (BDNF) in glial cells was examined using rat C6 glioma cells as an in vitro model system. Hemin elevated both HO-1 and VEGF mRNA levels in the glioma cells at the concentration causing no critical damage to the cells, and the elevation of BDNF mRNA levels was also observed by exposing the cells to hemin under the same conditions. Furthermore, the elevation of VEGF and BDNF mRNA levels induced by hemin was blocked by pretreatment of the cells with the agents inhibiting not only HO-1 gene expression but also its enzymatic activity. These pharmacological studies indicate that hemin can induce the enhancement of VEGF and BDNF gene expression probably through the mechanism mediated by HO-1 activity in the glioma cells, proposing the possibility that glial cells are capable of contributing to the recovery of brain function from the damage caused by cerebral hemorrhage through the production of neurogenic and angiogenic factors.</P>

Multiple Movement AND D-LINKING

Morita, Hisashi 대한언어학회 2003 언어학 Vol.11 No.2

This paper aims to resolve problems with multiple movements of wh-phrases, particularly, in Bulgarian. The topic includes discussions of (ⅰ) why and how multiple movements are possible, (ⅱ) what kind of movement they are, that is, whether they are WH movement as Pesetsky (2000) argues or focus movement as Bo??kovi?? (1998) claims, and (ⅲ) why D-linked wh-Phrases can remain in situ. I will argue that multiple movement of wh-phrases is not WH but focus movement and will show that D-linked wh-phrases can omit their WH features due to Pragmatic support and, because of this, they can escape overt movement.

Optimization of Joint Force of Planar Linkage with Clearances at Turning Pairs

Morita, Nobuyoshi,Feng, Bin,Torii, Takao 대한기계학회 1996 International Sessions in Celebration of the 50th Vol.1 No.1

This paper presents a new dynamic design method, which is to controls the sharp changes of joint forces, through adjusting the distributing of masses of links itself. The masses, the center of mass and the moment of inertia of links are taken as the optimum design variables. The multi-objective optimum design is carried out by using the nonlinear optimization technique. A small element method to form the shape of links from the optimized parameters is developed. The dynamic characteristics of optimized four-bar mechanism are also investigated.