Antonio D Mata

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This study investigated the effects of diabetes mellitus (types I and II) on human salivary gland function compared to healthy age-matched controls. The results have shown that both type I and type II diabetic patients secrete significantly (p < 0.05) less resting and stimulated saliva compared to healthy age-matched controls (AMC). It was also found that(More)
INTRODUCTION Apical constriction has been proposed as the most appropriate apical limit for the endodontic working length. Despite being the most used, some limitations are attributed to the radiographic method of working length determination. It lacks precision because it is based on the average position of the apical constriction. The electronic apex(More)
The parotid glands are highly active secretory systems subjected to continuous stress, which in turn, can lead to several pathophysiological conditions. Damage of the parotid glands are caused by radical oxygen species (ROS) as by-products of oxygen metabolism. This study investigated the effect of hydrogen peroxide (H(2)O(2)) on Carbachol (CCh)-evoked(More)
This study investigates the effect of perturbation of extracellular magnesium [Mg2+]o on basal and acetylcholine (ACh), noradrenaline (NA) and phenylephrine (PHE)-evoked amylase secretion from isolated rat parotid gland segments. Both zero (0 mM) and elevated (5 mM and 10 mM) [Mg2+]o can significantly (P < 0.05) inhibit basal and secretagogue-evoked amylase(More)
INTRODUCTION The anatomy of the maxillary C-shaped molar has been the subject of several case reports although no true prevalence research has ever been conducted. The aim of this observational study was to evaluate and characterize the incidence of these morphologies using cone-beam computed tomographic (CBCT) technology. METHODS Patients having(More)
INTRODUCTION Complex root canal systems appear regularly on fused roots. The aim of this observational study was to evaluate the prevalence of fused roots and root canal merging in the first and second upper and lower permanent molars by using cone-beam computed tomography technology. METHODS A large sample of cone-beam computed tomography examinations(More)
This study investigated the effects of extracellular Mg(2+) ([Mg(2+)](o)) on basal and acetylcholine (ACh)-evoked amylase secretion and intracellular free Ca(2+) ([Ca(2+)](i)) in rat parotid acinar cells. In a medium containing 1.1 mM [Mg(2+)](o), ACh evoked significant increases in amylase secretion and [Ca(2+)](i). Either low (0 mM) or elevated (5 and 10(More)
OBJECTIVE The purpose of this study was to evaluate the prevalence of first and second C-shaped mandibular molars in a Western European population of Portuguese Caucasians. MATERIALS AND METHODS Patients having both routine panoramic radiograph and presurgical cone-beam computed tomography (CBCT) exams were selected. The CBCT examination was performed at(More)
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