STATEMENT OF PROBLEM Mechanical properties of denture acrylic resins are important for the clinical success of multiple types of prostheses. Acrylic resins must be strong and resilient so as to withstand impact. Few studies utilize cyclic loads to characterize material response to repeated stress. PURPOSE The purpose of this study was to evaluate static and dynamic flexure properties of a var...

Methods: The sample consisted of 20 subjects (20 left and 20 right mandibular third molars) who underwent pre-operative radiographic evaluation before extraction of impacted mandibular third molars. On panoramic radiographs, the most common high risk injury signs of inferior alveolar nerve (darkening of roots, interruption of white line, deviation of mandibular canal, narrowing of mandibular ca...

background and aims. the aim of this study was to determine whether variations in the mesiodistal dimensions of mandibular canines had any role in sex determination. materials and methods. the study comprised of patients in the 19‒24-year age group (20 males and 20 females). mesiodistal dimensions of mandibular canines was measured at the maximum mesiodistal width, first intraorally, then on pl...

introduction: the aim of this study was to evaluate the root canal morphology of mandibular first and second molars using cone-beam computed tomography (cbct) in northern iranian population and also to indicate the thinnest area around root canals. methods and materials: we evaluated cbct images of 154 first molars and 147 second molars. by evaluating three axial, sagittal and coronal planes of...

In this paper, we demonstrate that a Flexure-FET [1] (flexure sensitive field effect transistor) can dramatically enhance the sensitivity of stress based chem-bio sensors. A Flexure-FET translates any change in the stress of the suspended gate into corresponding change in the drain current of the integrated transistor, thereby offering direct electrical readout of the sensor signal. Moreover, w...

I t has been demonstrated that strychninization in Asterias is followed by extreme dorsal flexure of the rays and consequent inability to make righting movements ~ (Figs. 1, 2, and 3). This "spasm" position of the rays is accelerated and accentuated by sensory stimulation. In order to determine the location of the muscles which cause this action, the dorsal, myodermal sheath is cut from all fiv...

background and aims. one of the most common reasons for the inferior alveolar nerve block anesthesia failure is the variation in mandibular foramen location. the aim of this study was to assess the location of mandibular foramen in children with mandibular retrognathism in comparison to children with normal skeletal occlusion in the mixed dentition. materials and methods. one hundred and twenty...

conclusions in this study, use of one miniplate or two miniplates for treatment of favorable mandibular angle fractures was associated with a similar incidence of complications. thus, it seems that the use of two miniplates in this setting may not be warranted, nor cost-efficient. results in the single miniplate group, 25 patients showed lip numbness associated with surgery (55.6%), 22 patients...

Modifications of the molluscan feeding apparatus have long been recognized as a crucial feature in molluscan diversification, related to the important process of gathering energy from the environment. An ecologically and evolutionarily significant dichotomy in molluscan feeding kinematics is whether radular teeth flex laterally (flexoglossate) or do not (stereoglossate). In this study, we use a...

A Local Load Sharing (LLS) model recently developed by Curtin and co-workers for the numerical simulation of tensile stress-strain behavior in fiber-reinforced composites is used to predict the tensile strength of metal matrix composites consisting of a Titanium matrix and unidirectionally aligned SiC fibers. This model is extended to include the effects of free boundary conditions and non-cons...