the human oral cavity includes different bacterial community. advantage anddisadvantage of these bacteria depend on their ability to adhere to the toothsurfaces. some microbiota could cause oral disease, however, some of them inhibitformation of biofilm on teeth and therefore prevent dental caries. the present studywas undertaken to investigate on the dmft index (d: decay, m: missing, f: fillin...

introduction: one of the reasons people do not refer to dental offices is anxiety over pain. preoperative education is one of non-pharmacological methods to treat anxiety. this study evaluated the effect of preoperative education on decreasing state and trait anxiety in patients referring to a dental surgery center. materials and methods: the subjects in this clinical trial consisted of all the...

introduction: as one of the most common cancers among head and neck malignancies, cancer of the oral cavity probably has some variations in countries with a high prevalence of esophageal cancer.  materials and methods: patients with oral cavity cancer who were treated at two tertiary referral centers from january 1999 to january 2009 were included in this study. in addition to demographic data,...

the cancer of oral cavity is related to lesions of mucous membrane of tongue and gum that can be treated with radiation therapy. a lateral photon field can be used to treat this kind of tumor, which has a side‑effect on normal tissue in the opposite side of the oral cavity. in this study the dosimetric effect of the various shields in oral cavity is evaluated. in this study, a special phantom s...

Individual variation of larynx position reflects human morphological differences and thus contributes to generating biological information in speech sounds. This study examines the factors of orofacial morphology that co-vary with larynx position based on MRI data collected for 12 Japanese and 12 English speakers. The materials are midsagittal craniofacial images, and the method is based on the...

abstract background and aims. reliable immunohistochemical assays to evaluate the definitive role of mast cells and angiogenesis in the pathogenesis of oral reactive lesions are generally not available. the purpose of the present study was to compare mast cell count (mcc) and microvessel density (mvd) between oral reactive lesions and evaluation of the correlation between mcc and mvd in these l...

to evaluate the effect of adding neoadjuvant chemotherapy to surgery and radiation therapy for locally advanced resectable oral cavity squamous cell carcinoma, 24 patients with t3 or t4a oral cavity squamous cell carcinoma were randomly assigned to surgery alone or docetaxel, cisplatin, and 5-fu (tpf) induction chemotherapy followed by surgery. all patients were planned to receive chemoradiothe...

objective: oral non- hodgkin’s lymphoma (nhl) is a relatively rare neoplasm that may develop in the soft tissues or jaw bones, with or without node or marrow involvement. oral lymphomas are often difficult to diagnose as there are no characteristic clinical features and usually appear as non-tender swellings.   case: we describe clinical, radiographic, histopathological and immunohistochemical ...

Spindle cell neoplasms are defined as neoplasms that consist of spindle-shaped cells in the histopathology. Spindle cell neoplasms can affect the oral cavity. In the oral cavity, the origin of the spindle cell neoplasms may be traced to epithelial, mesenchymal and odontogenic components. This article aims to review the spindle cell neoplasms of the oral cavity with emphasis on histopathology. ...

this paper investigates the radiative absorptivity of a spherical cavity by using monte carlo techniques. several parameters such as the angle of incoming radiation which inters the cavity for both diffuse wall cavity and specular wall cavity has been  investigated. the absorptivity of a spherical cavity has been calculated and compared with the exact values when the angle of incoming radiation...