نتایج جستجو برای: cusp particle entry

تعداد نتایج: 250657  

2001
J. Měrka

The width of the cusp region is an indicator of the strength of the merging process and the degree of opening of the magnetosphere. During three years, the Magion-4 satellite, as part of the Interball project, has collected a unique data set of cusp-like plasma observations in middle and high altitudes. For a comparison of highand low-altitude cusp determination, we map our observations of cusp...

Ali Eskandarizadeh Ali Taheri Masoud Parirokh Molouk Torabi Parizi

Aim: the aim of this study was to compare cusp deflection, infraction and fracture in teeth filled with three temporary filling materials. Materials & method: Forty five extracted human premolar teeth were chosen. After root canal therapy and mesio-occluso-distal cavity preparation, samples were randomly divided into three groups , each contained 15 teeth and filled with three temporary filling...

Journal: :Cell 2010
Xing Zhang Lei Jin Qin Fang Wong H. Hui Z. Hong Zhou

To achieve cell entry, many nonenveloped viruses must transform from a dormant to a primed state. In contrast to the membrane fusion mechanism of enveloped viruses (e.g., influenza virus), this membrane penetration mechanism is poorly understood. Here, using single-particle cryo-electron microscopy, we report a 3.3 A structure of the primed, infectious subvirion particle of aquareovirus. The de...

2017
Jamie M. Jasinski Christopher S. Arridge Andrew J. Coates Geraint H. Jones Nick Sergis Michelle F. Thomsen Daniel B. Reisenfeld Norbert Krupp Hunter Waite

The magnetospheric cusp is a funnel-shaped region where shocked solar wind plasma is able to enter the high-latitude magnetosphere via the process of magnetic reconnection. The plasma observations include various cusp signatures such as ion energy dispersions and diamagnetic effects. We present an overview analysis of cusp plasma observations at the Saturnian magnetosphere from the Cassini spac...

2012
Rakesh N Bahadure Nilima Thosar Eesha S Jain

The talon cusp is a relatively rare dental developmental anomaly characterized by cusp-like projections, usually observed on the lingual surface of the affected tooth. Normal enamel covers the cusp and fuses with the lingual aspect of the tooth. The cusp may or may not contain an extension of the pulp. The condition can occur in both the primary and permanent dentitions. However, the occurrence...

Journal: :journal of dental research, dental clinics, dental prospects 0
firoz pouralibaba mohammad joulaei atabak kashefimehr farzaneh pakdel zahra jamali ali esmaeili

background and aims. the present study evaluated the most common reasons for replacing amalgam restorations in a university clinic. materials and methods. a total of 217 restorations which needed to be replaced were clinically and radiographically evaluated in a period of 4 months. the frequencies of reasons for replacing amalgam restorations were calculated: the assessed items included recurre...

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
anousheh rashed mohassel department of pedodontics, faculty of dentistry, birjand university of medical sciences, birjand, iran. samir zahedpasha department of endodontics, faculty of dentistry, birjand university of medical sciences, birjand, iran. mahtab hamzeh department of pediatric denti stry, guilan university of medical sciences, rasht, iran.

dental anomalies are rare findings that may affect development of occlusion and early intervention may be required. here, a case of multiple anomalies in primary and perma nent dentitions is reported. the patient referred to the dental center with the chief complaint of multiple tooth decay. in the oral examination, the rare case of triplica tion between the right geminated man-dibular a and ri...

Journal: :SIAM Journal on Applied Dynamical Systems 2007

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
بهشته ملک افضلی beheshteh malek afzali dental school, shahid beheshti university of medical sciences, tehran- iran.دانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید بهشتی امیر قاسمی amir ghassemi dental school, shahid beheshti university of medical sciences, tehran- iran.دانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید بهشتی سیده سعیده محتوی پور saeedeh mohtavipour dental school, gilan university of medical sciences, gilan- iran.دانشکده دندانپزشکی، دانشگاه علوم پزشکی گیلان فائزه فتوحی اردکانی faezeh fotouhi ardakani dental school, shahid sadoughi university of medical sciences, yazd- iran.دانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید صدوقی یزد. نیلوفر گودرزی niloofar goodarzi محمودرضا فریدونی mahmoud reza fereydooni

objective: resistance to fracture is a critical issue when it comes to tooth restoration. the purpose of this study was to evaluate the fracture resistance of pulpotomized primary molars restored with glass ionomer (gi), amalgam and composite resin with and without cusp reduction.   methods: in this in-vitro experimental study, 60 extracted primary teeth were randomly divided into 6 groups of 1...

Journal: :dental research journal 0
yeliz guven yelda kasimoglu elif bahar tuna koray gencay oya aktoren

background: talon cusp is a rare dental anomaly characterized by a cusp‑like projection, often including the palatal surface of the affected tooth. the aim of the present study was to investigate the prevalence and characteristics of talon cusps in a group of turkish children. materials and methods: the study population consisted of 14,400 subjects who attended the clinics of the department of ...

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