Objectives Tooth rotation is one of the most prevalent dental anomalies. Early management of rotated teeth would prevent possible occlusal interferences. The purpose of this case report was to introduce a fixed-removable appliance, which can efficiently correct severely rotated anterior teeth in a short duration of time in mixed dentition period. Case A 7-year-old boy with a Class I malocclusi...

OBJECTIVE To introduce and evaluate a novel approach in treating horizontally impacted mandibular second and third molars. MATERIALS AND METHODS An orthodontic technique was applied for treatment of horizontally impacted mandibular second and third molars, which included a push-type spring for rotation first, and then a cantilever for extrusion. There were 8 mandibular third molars (M3s) and ...

This article deals with the synthesis of a ten-link tooth-lever differential transmission mechanism. The contains an analytical review modern scientific research on mechanisms roller machines variable center distance working shafts; method for toothlever shafts described example mechanism; conditions mechanism given and substantiated when this is used in machine; one its has ability to rotate a...

The friction and wear characteristics of spike-tooth material (65Mn steel) Spike-Tooth Harrow in a two-stage peanut harvester were studied this paper. tests pin disc on 65 manganese steel carried out the tribometer, then loss coefficient studied. was acquired by calculating mass before after experiment using an electronic balance. According to actual working environment spring-finger, four vari...

To promote the engineering application of composite transmission high speed curve face gear, which consists a cylindrical gear and analysis tooth bending stress should be taken into consideration. High pair is new type pair. Combined with principle cam transmission, it can transfer axial/rotation motion power between two intersecting shafts. Based on engagement principle, meshing coordinate sys...

The purpose of this study was to develop a new finite element method for simulating long-term tooth movements and to compare the movement process occurring in canine retraction using a T-loop spring having large bends and with that having small bends. Orthodontic tooth movement was assumed to occur in the same manner as the initial tooth movement, which was controlled by the moment-to-force (M/...

The paper presents the results on hereditary and environmental dental findings in identification of human remains exhumed from mass graves in the Republic of Croatia. The total of 17,880 teeth from all the categories (incisors, canines, premolars and molars) was examined. Hereditary findings of the teeth such as shape, size, position, as well as age were used in all of the cases confirming and ...

The porpose of this study was to determine the optimal length of power arms for achieving controlled anterior tooth movement in segmented arch mechanics combined with power arm. A three-dimensional finite element method was applied for the simulation of en masse anterior tooth retraction in segmented power arm mechanics. The type of tooth movement, namely, the location of center of rotation of ...

The objective of this study was to analyse the stress distribution in periodontal ligament and tooth structure a cementum-reinforced tooth, dentine-reinforced an immature during orthodontic loads using finite element analysis. A model maxillary incisor its supporting tissues developed. root segmented into two parts: part that represented state apical tissue formed after regenerative endodontics...