1.A Case of Impacted Supernumerary Fourth Molar in the Bilateral Mandibular Ramus
Tomoki Sumida ; Ryuichi Murase ; Tomohide Yoshimura ; Takayoshi Aramoto ; Akiko Ishikawa ; Hiroyuki Hamakawa
Oral Science International 2009;6(2):106-108
The occurrence of multiple supernumerary teeth in individuals without any associated syndrome is rare. In this report, a rare case of a 48-year-old woman who had an impacted supernumerary fourth molar in the bilateral mandibular ramus is described. She presented with a swelling in the left cheek region. Radiographic examination revealed an impacted supernumerary tooth in the left mandibular ramus with pericoronal resorption of the bone, suggesting peripheral inflammation. She also had an impacted supernumerary tooth on the right side. After administering an antibiotic and antiinflammatory drug, tooth extraction was performed under general anesthesia.
2.Effects of Long-term Thrombin Inhibition (Dabigatran Etexilate) on Spontaneous Thrombolytic Activity during the Progression of Atherosclerosis in ApoE−/−–LDLR−/− Double-Knockout Mice
Tomohide SANDA ; Manami YOSHIMURA ; Kanae HYODO ; Hiromitu ISHII ; Tsutomu YAMASHITA
Korean Circulation Journal 2020;50(9):804-816
Background and Objectives:
Atherosclerosis is characterized by a hypercoagulable state, during which coagulation and fibrinolytic factors are activated simultaneously. However, details regarding the thrombolytic pathway in this context remain unknown. Here we investigated how direct long-term inhibition of thrombin influenced spontaneous thrombolytic activity during atherosclerotic progression in apolipoprotein E (ApoE)–/––low density lipoprotein receptor (LDLR)–/– double-knockout mice.
Methods:
All mice received either standard chow (placebo group) or dabigatran-containing chow for 22 weeks, after which we evaluated them. The amount of atherosclerosis was estimated as the ratio of the atherosclerotic area to the total aortic intimal area. In addition, we used immunohistochemistry to analyze the expression of tissue plasminogen activator (t-PA), plasminogen activator inhibitor-1 (PAI-1), thrombin activatable fibrinolysis inhibitor (TAFI), and endothelial nitric oxide synthase (eNOS) in atherosclerotic regions. To evaluate thrombolysis, we used a He–Ne laser to induce thrombosis in vessels of the cremaster muscle and then measured the thrombus volume over time.
Results:
The atherosclerotic area was smaller and thrombolytic activity greater in the dabigatran-treated group than in the placebo group. Furthermore, according to the thrombolysis model, spontaneous thrombolytic activity was increased in the dabigatran-treated mice compared with the placebo mice. In support of these results, immunohistochemistry demonstrated decreased expression of PAI-1 and TAFI but increased expression of eNOS in the dabigatran group compared with the placebo group. However, t-PA expression did not differ between groups.
Conclusions
Direct long-term inhibition by dabigatran etexilate of thrombin led to an increase in spontaneous thrombolytic activity decreasing the expression of PAI-1 and TAFI.
3.Low-grade myofibroblastic sarcoma of the palate.
Tomohiro YAMADA ; Tomohide YOSHIMURA ; Naoya KITAMURA ; Eri SASABE ; Seiji OHNO ; Tetsuya YAMAMOTO
International Journal of Oral Science 2012;4(3):170-173
Low-grade myofibroblastic sarcoma (LGMS) is a rare, malignant tumor with myofibroblastic differentiation. Despite it being classified as a distinct entity by the World Health Organization, a few cases were reported in the oral and maxillofacial region. Here, a LGMS developed on the palate of a 73-year-old man who presented with a 1-cm tumor on the posterior border of the palate. Based on the histological and immunohistochemical features, a diagnosis of LGMS was established. The tumor was resected, and no recurrence was observed over 2 years. Although the tongue is the most preferred site for LGMS, it may occur in any region of the oral cavity.
Aged
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Humans
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Male
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Myofibroblasts
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pathology
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Osteosarcoma
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pathology
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surgery
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Palatal Neoplasms
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pathology
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surgery
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Palate, Hard
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pathology