OBJECTIVE To evaluate the effectiveness of temporary anchorage device (TAD)-anchored maxillary protraction (MP) in terms of the skeletal and dentoalveolar changes and to compare it with traditional tooth-anchored MP. MATERIALS AND METHODS A computerized literature search for relative randomized controlled trials and prospective controlled trials was performed in PubMed, MEDLINE, Cochrane Cent...

BACKGROUND Understanding mechanisms responsible for changes in tooth morphology in the course of evolution is an area of investigation common to both paleontology and developmental biology. Detailed analyses of molar tooth crown shape have shown frequent homoplasia in mammalian evolution, which requires accurate investigation of the evolutionary pathways provided by the fossil record. The neces...

BACKGROUND Charcot-Marie-Tooth disease is an inherited neuropathy causing progressive weakness, foot deformity and difficulty walking. Clinical anecdotes suggest orthoses designed on the 'sensorimotor' paradigm are beneficial for improving gait in Charcot-Marie-Tooth disease. OBJECTIVES Investigate the effect of sensorimotor orthoses on in-shoe and lower limb biomechanics in adults with Charc...

INTRODUCTION To understand orthodontic tooth movement, a method of quantification of tooth position discrepancies in 3 dimensions is needed. Brackets and wires now can be fabricated by CAD/CAM technology on a setup made at the beginning of treatment, so that treatment should produce a reasonably precise duplicate of the setup. The extent of discrepancies between the planned and actual tooth mov...

trauma to primary teeth can lead to devastating sequels in development of permanent successors. the disturbance may range from enamel hypoplasia and/or hypo-calcification to arrest of dental bud development. crown dilaceration of permanent teeth is one of the consequences of trauma to deciduous teeth mainly due to intrusion or avulsion. this report presents a mandibular central incisor with dil...

OBJECTIVE To assess comparatively the magnitude of moments generated during rotational correction from different bracket systems during the late leveling and alignment stage of orthodontic treatment. MATERIALS AND METHODS The three types of brackets assessed were Orthos2 (ORMCO, Glendora, CA), Damon2 (ORMCO), and In Ovation-R (GAC, Bohemia, NY). The brackets were bonded on replicas made of re...

Sawdust evaluation in bioremediation of PMS hydrocarbon polluted agricultural soil was carried out. The effect of different parameters; total petroleum hydrocarbon, dehydrogenase activity, optical density and pH on bioremediation performance were evaluated. Studied parameters such as microbial dynamics and hydrocarbon removal were found to be higher in sawdust amended system and differed signif...

A CNC machine tool for machining designed to facilitate the replacement of cutting tools includes a workbench, motor and hydraulic cylinder. The inner bearing workbench is connected with rotating rod, outer key rod half gear, output end lower rod. machining, which convenient replacing tools, realizes linkage between body adjusting gear by using tooth block, drives move rotation screw adjust pos...

Studying gear power loss theoretically and determining the efficiency of a helical drive depend on many geometrical working parameters, such as rotation speed, tooth number, ratio, helix angle, torque, among others. In this paper, Plackett–Burman screening design Box–Behnken response-surface method are used to consider how above parameters influence efficiency, experimental models provided eval...