INTRODUCTION This study aims to determine the shape and dimension of dental arches from a lingual perspective, and determine shape and size of a straight archwire used for lingual Orthodontics. METHODS The study sample comprised 70 Caucasian Brazilian individuals with normal occlusion and at least four of Andrew's six keys. Maxillary and mandibular dental casts were digitized (3D) and the ima...

The H-T-P (freehand drawing of House, Tree, and Person) is a technique designed to aid the clinician in obtaining information concerning the sensitivity, maturity, and integration of a subject's personality, and the interaction of that personality with its environment (both specific and general). The H-T-P is a two-phased approach to the personality. The first phase is non-verbal, creative, alm...

Testing linear combinations of normal group means with unequal variances and possibly unequal samples sizes using a t-statistic is a well known problem for which the effective degrees of freedom are unknown. ? and ? set forth their approximations based on the ratio of combinations of fourth moments, and their methodology remains the de facto standard. We propose a new approach that extends thei...

in this paper the design of a biped robot actuated with shape memory alloy (sma) springs with minimum degrees of freedom is presented. sma springs are a class of smart materials that are known for their high power to mass and volume ratios. it was shown that utilizing spring type of smas have many advantages as large deformation, smooth motion, silent and clean movement compared to ordinary typ...

Statistical tests are very important in biomedical research.1 Several factors play a role in selecting the most appropriate statistical test.2 The misuse or inaccurate use of a statistical test may navigate the research in the wrong direction, and hence incorrect conclusions. Because it is probably the most commonly used statistical test, Student’s t-test is considered “the bread and butter” of...

in recent years a large number of pesticides used in the warehouses fumigation have been abandoned, and only methyl bromide and phostoxine are widely used for fumigation of foodstuffs and storage spaces. due to possibility of health impairment, environmental contamination and resistance enhancement of insects, the use of these two fumigants is under scrutiny and restriction. under such circumst...

Centromere stabilizer T he defi ning feature of centromeres is the presence of a protein called CenH3, but how this specialized histone gets to centromeres and stays there has been a mystery. Perpelescu et al. bring us one step closer to unraveling the mystery with their discovery that a chromatin remodeling protein called RSF stabilizes CENP-A (the human CenH3) at centromeres. The expansive DN...