نتایج جستجو برای: incisor torque

تعداد نتایج: 31144  

Journal: :Pediatric dentistry 2004
Ming Tak Chew Marianne Meng-Ann Ong

Dilaceration is one of the causes of maxillary central incisor eruption failure. Surgical excision is frequently the first choice of treatment for a severely dilacerated incisor. In this article, the case of a horizontally impacted and dilacerated maxillary central incisor was diagnosed and treated by surgical exposure using the apically repositioned flap technique combined with orthodontic tra...

Journal: :American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 2007
Sug-Joon Ahn Bum-Soon Lim Shin-Jae Lee

INTRODUCTION Streptococcus mutans and Streptococcus sobrinus are the main causative organisms for enamel demineralization during orthodontic treatment. In this study, we analyzed the prevalence of cariogenic streptococci adhering to incisor brackets. METHODS Four incisor brackets from both the maxilla and the mandible were collected from 80 patients at debonding, immediately after the visible...

2012
Laith Mahmoud Abdulhadi Hana Abbas Mohammed

Selection of anterior teeth depends mainly on Leon William theory that hypothesizes the presence of harmony between the face and inverted central incisor forms. If this theory is approved mathematically then the central incisor form and width could be predicted and calculated with acceptable precision in clinical practice. The purpose of this study was to predict the tooth form and mesiodistal ...

2012
Kateryna Kyrylkova Sergiy Kyryachenko Brian Biehs Ophir Klein Chrissa Kioussi Mark Leid

Mouse incisors grow continuously throughout life with enamel deposition uniquely on the outer, or labial, side of the tooth. Asymmetric enamel deposition is due to the presence of enamel-secreting ameloblasts exclusively within the labial epithelium of the incisor. We have previously shown that mice lacking the transcription factor BCL11B/CTIP2 (BCL11B hereafter) exhibit severely disrupted amel...

Journal: :Evolution & development 2010
Pauliina M Munne Szabolcs Felszeghy Maria Jussila Marika Suomalainen Irma Thesleff Jukka Jernvall

The single large rodent incisor in each jaw quadrant is evolutionarily derived from a mammalian ancestor with many small incisors. The embryonic placode giving rise to the mouse incisor is considerably larger than the molar placode, and the question remains whether this large incisor placode is a developmental requisite to make a thick incisor. Here we used in vitro culture system to experiment...

Journal: :Archives of oral biology 2004
G O Ramirez-Yañez T J Daley A L Symons W G Young

UNLABELLED The effect of altered occlusion on the mandibular condylar cartilage remains unclear. OBJECTIVE This study investigated the effect of unilateral incisor disocclusion on cartilage thickness, on mitotic activity and on chondrocytes maturation and differentiation in the mandibular condylar cartilage of rats. DESIGN The upper and lower left incisors were trimmed 2mm every second day ...

2016
Ramesh Venkatesan Mohan Naveen Ravi Teja Shankar Paulindraraj Sai K Vallabhaneni Selva B Arumugam

AIM The aim of the study is to determine how rural children view children with visible incisor fracture. MATERIALS AND METHODS Class 7 (aged 11-12 years) and class 10 (aged 14-15 years) schoolchildren (the participants) were invited to make a social judgment about the color photograph of two children (the subjects). Participants were randomly allocated either (i) pictures of children without ...

Journal: :the modares journal of electrical engineering 2016
a. moazami a. kiyoumarsi b. mirzaeian m. niromand s. m. madani madani

the direct torque control (dtc) of interior permanent magnet synchronous motor (ipmsm) offers simple structure and fast torque response. the conventional switching table-based dtc (st-dtc) presents some disadvantages like high torque and flux ripple and also variable switching frequency. this paper investigates the improved st-dtc strategies to reduce both torque and flux ripple in dtc of ipmsm...

Journal: :journal of mechanical research and application 2011
hossein nazary nafise aalipour mansour alizadeh

since knowledge on hydrodynamic torque of a butterfly valve is very important for butterfly valve design, its hydrodynamic torque is investigated in this paper. in reality, the investigation of the loss coefficient and torque from some experiments will take a long time and a lot of money. this paper presents a statistical study of the flow past the butterfly valve in a static analysis using com...

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