ミニープレートの破折

Mini-plate fracture was found in a case of the bone grafting after the segmental mandibular excision, and a case of osteomyelitis in the radiographic follow-up examinations. It was emphasized that usefulness of mini-plate would be evaluated by modification in shape and number of mini-plate used for fixation or reconstruction

三叉神経一次感覚ニューロンにおける内向き整流作用のグルタミン酸受容体依存性神経修飾機構

In the present study, we showed that activation of metabotropic glutamate receptors in rat mesencephalic trigminal (Mes V) neurons (which are important in the genesis and control of oral-motor activities) can modulate hyperpolarization-activated inward current (Ih). Whole-cell recordings were obtained from rat Mes V neurons, and I_h was induced by a hyperpolarizing current or voltage pulses. Application of ACPD, which is a group I and II mGluRs agonist, suppressed the voltage-and time-dependent voltage sag under current-clamp recording, and suppressed the steady-state inward current under voltage-clamp recording, suggesting that it inhibited I_h. Further investigation revealed that group II mGluRs activation and the release of intracellular Ca^ mediated ACPD-in-duced inhibition of I_h. Additionally, low-frequency (<10Hz) resonant properties exhibited at membrane potentials ranging from resting potential to hyperpolarization were substantially reduced by ACPD, indicating that modulation of I_h by mGluRs activation induces substantial changes in the frequency preference with which neurons respond to synaptic inputs

Characterizing NTRU-Variants Using Group Ring and Evaluating their Lattice Security

The encryption scheme NTRU is designed over a quotient ring of a polynomial ring. Basically, if the ring is changed to any other ring, NTRU-like cryptosystem is constructible. In this paper, we propose a variant of NTRU using group ring, which is called GR-NTRU. GR-NTRU includes NTRU as a special case. Moreover, we analyze and compare the security of GR-NTRU for several concrete groups. It is easy to investigate the algebraic structure of group ring by using group representation theory. We apply this fact to the security analysis of GR-NTRU. We show that the original NTRU and multivariate NTRU are most secure among several GR-NTRUs which we investigated

Acute inflammation at a mandibular solitary horizontal incompletely impacted molar

Acute inflammation is frequently seen in the elderly around incompletely impacted molars located apart from molars or premolars. To identify the factors causing acute inflammation in the solitary molars without second molars or without second and first molars, ages of patients and rates of acute inflammation in 75 horizontal incompletely impacted mandibular molars in contact or not in contact with molars in subjects 41 years old or older were studied using orthopantomographs. Acute inflammation was seen in nine third molars out of 48 third molars in contact with second molars (18.8%), whereas acute inflammation was seen in 11 molars out of 19 solitary molars without second molars or without first and second molars (57.9%) (p < 0.01). The mean age of 48 subjects with third molars in contact with the second molar was 50.42 ± 7.62 years, and the mean age of 19 subjects with isolated molars was 65.16 ± 10.41 years (p < 0.0001). These indicate that a solitary horizontal incompletely impacted molar leads more frequently to acute inflammation along with aging due to possible bone resorption resulting from teeth loss

MQ Challenge: Hardness Evaluation of Solving Multivariate Quadratic Problems

Multivariate Quadratic polynomial (MQ) problem serve as the basis of security for potentially post-quantum cryptosystems. The hardness of solving MQ problem depends on a number of parameters, most importantly the number of variables and the degree of the polynomials, as well as the number of equations, the size of the base field etc. We investigate the relation among these parameters and the hardness of solving MQ problem, in order to construct hard instances of MQ problem. These instances are used to create a challenge, which may be helpful in determining appropriate parameters for multivariate public key cryptosystems, and stimulate further the research in solving MQ problem

顎舌骨筋運動ニューロンと一次求心線維のシナプス接合について

Horseradish peroxidase conjugated with wheat germ agglutinin (HRP-WGA) was injected into the muscle branch of the mylohyoid nerve in rats. HRP-labeled neuronal cell bodies were observed ipsilaterally in the caudal portion of the trigeminal mesencephalic nucleus and the ventromedial division of the trigeminal motor nucleus (Vmo.vm). Electron microscope observations were carried out on sections through Vmo.vm containing HRP-labeled cell bodies. Synaptic contacts were found between HRP-labeled axon terminals and HRP-labeled nerve cells. The results suggested that mylohyoid muscle spindle afferents are synaptic contacts on the mylohyoid motoneurons