Masaru Sugiyama

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Objectives of the Study. Cleft lip and palate (CLP) is a prevalent congenital anomaly in the orofacial region. Autogenous iliac bone grafting has been frequently employed for the closure of bone defects at the jaw cleft site. Since the related surgical procedures are quite invasive for patients, it is of great importance to develop a new less invasive(More)
BACKGROUND Oral human papillomavirus (HPV) infection is associated with oral cancer development. However, few epidemiologic investigations have focused on oral HPV prevalence in healthy individuals. The objective of this study was to provide updated information regarding oral HPV prevalence in patients without oral cancer worldwide. METHODS We(More)
Concrescence of teeth is a condition showing a union of adjacent teeth by only cementum. In all the previously reported cases, the union has been observed between the roots of the affected teeth. Here, we describe the first case that showed a concrescence of the crown of an impacted tooth and the roots of the erupted tooth. In addition, we discuss how this(More)
OBJECTIVE The objective of this study was to clarify differences regarding HPV16 infection and gene amplification between the oral cavity and oropharynx in healthy individuals. MATERIAL AND METHODS The subjects were 94 healthy asymptomatic individuals (41 males, 53 females; mean age 58.6 years, range 16-97 years) who visited the Department of Oral and(More)
In students' dissection practice, it is very difficult to teach students the structures and functions of the middle ear ossicles. The middle ear ossicles are too small to explain their structures and functions. Models are useful in explaining these points, but there have been no models that accurately explain the movements of the middle ear ossicles and the(More)
Stationary heat conduction in a one-dimensional hard point gas is studied numerically with molecular dynamics simulations and theoretically on the basis of extended thermodynamics. Temperature profile with jumps at the boundaries is analyzed consistently. Heat conductivity seems to converge as the system size tends to infinity.
A clonal neoplastic epithelial duct cell (HSGc) of human salivary gland origin has a fine structure similar to the intercalated duct cell and the capacity to express secretory component and lac-toferrin. HSGc cells tend to form an occasional glandular arrange ment in vitro and in vivo, and transplantation of cells into nude mice resulted in production of(More)
In a displacement test using 3H-diazepam as a radioligand, the in vitro affinities of metabolites of camazepam (CZ) for the benzodiazepine receptors were 1-50 times more potent than that of CZ. In contrast, only three metabolites (temazepam, oxazepam, and hydroxy CZ), as well as CZ itself, exhibited an in vivo affinity parallel to their ability to protect(More)
We measured laryngeal resistance with 800 Hz sound in human subjects. 800 Hz sound was forced into the mouth and the intensities of sound above and below vocal cord were detected by two microphones on the anterior neck. Respiratory resistance (Rrs) was simultaneously measured by an oscillation method. When the subject voluntarily controlled the glottis(More)
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