نتایج جستجو برای: coronal enlargement

تعداد نتایج: 36953  

2004
M. J. PENN H. LIN S. TOMCZYK D. ELMORE

The effect of a background signal on the signal-to-noise ratio is discussed, with particular application to ground-based observations of emission lines in the solar corona with the proposed Advanced Technology Solar Telescope. The concepts of effective coronal aperture and effective coronal integration time are introduced. Specific expressions are developed for the 1σ measurement errors for cor...

Journal: :iranian endodontic journal 0
saeed asgary mahta fazlyab

this case report represents the outcome of endodontic treatment in an infected mandibular molar with periradicular periodontitis and inherent poor prognosis of root canal treatment due to severe root curvature. the tooth was successfully treated by leaving the mesial root non-obturated, the canal orifices were coronally sealed with calcium enriched mixture cement and a definitive coronal amalga...

2017
Masayuki Ishikawa Kai Cao Long Pang Nobuyuki Fujita Mitsuru Yagi Naobumi Hosogane Takashi Tsuji Masafumi Machida Shinichi Ishihara Makoto Nishiyama Yasuyuki Fukui Masaya Nakamura Morio Matsumoto Kota Watanabe

BACKGROUND Postoperative coronal imbalance is a significant problem after selective thoracic fusion for primary thoracic and compensatory lumbar curves in adolescent idiopathic scoliosis (AIS). However, longitudinal studies on postoperative behavior of coronal balance are lacking. This multicenter retrospective study was conducted to analyze factors related to onset and remodeling of postoperat...

Introduction: Cervical root resorption is one of the most important complications of intra coronal bleaching. A way of preventing this type of resorption is using a coronal barrier under the bleaching materials. The aim of this study was to compare the sealing ability of glass ionomer cement and Pro Root Mineral Trioxide Aggregate (MTA) as a coronal barrier in intra coronal bleaching. Materi...

Journal: :iranian endodontic journal 0
mina zarei department of endodontics, member of dental research center, dental school, mashad university of medical sciences, mashad, iran maryam javidi department of endodontics, member of dental research center, dental school, mashad university of medical sciences, mashad, iran jamileh ghoddusi department of endodontics, member of dental research center, dental school, mashad university of medical sciences, mashad, iran neda naghavi department of endodontics, dental school, mashad university of medical sciences, mashad, iran ehsan roohani department of restorative dentistry, dental school, mashad university of medical sciences, mashad, iran

introduction: the aim of this study was to compare the sealing ability of real seal (rs) and gutta-percha (gp). materials and methods: forty nine extracted human maxillary central incisors were used. the coronal part of each tooth was removed; the root canal was prepared using the crown down technique and apical enlargement to rotary file # 40. the specimens were randomly divided in to 3 groups...

2007
Markus J. Aschwanden Amy Winebarger David Tsiklauri Hardi Peter

The ‘‘coronal heating problem’’ has been with us over 60 years, and hundreds of theoretical models have been proposed without an obvious solution in sight. In this paper we point out that observations show no evidence for local heating in the solar corona, but rather for heating below the corona in the transition region and upper chromosphere, with subsequent chromospheric evaporation as known ...

1996
Seung-Hoon Shin

Based on unmarkedness of coronal cross-linguistically, coronal has been considered to be underspecified. Also, place assimilation where coronal tends to assimilate to the adjacent labial or velar by a featurefilling rule has been support the underspecification of coronals. I instead argue that coronal should be specified in Optimality Theory despite its unmarkedness, and place assimilation no l...

Journal: :the archives of bone and joint surgery 0
mohsen karami department of orthopedic surgery, taleghani hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran arash maleki department of orthopedic surgery, mofid children hospital, school of medicine, shahid beheshti university of medical sciences, tehran, iran keyan mazda robert debre hospital, paris 7 university, paris, france

background: to determine the most important preoperative factors that affect postoperative coronal parameters of scoliotic curves.   methods: all adolescent idiopathic scoliosis (ais) patients included in the study were classified according to lenke and king classification. the fusion levels were selected according to the rigidity of the existing curves (correction less than 50%), tilt of t1 an...

Journal: :iranian endodontic journal 0
zahed mohammadi department of endodontics, dental school, shahid sadoughi university of medical sciences, yazd, iran. [email protected] abbasali khademi department of endodontics, dental school, isfahan university of medical sciences, isfahan, iran

introduction: coronal leakage seems to play an important role in the failure of endodontic treatment. a double seal over root canal filling has been suggested as a means of improving the coronal seal. several restorative materials have been used in an attempt to produce a coronal barrier. the purpose of this study was to assess gray-coloured mineral trioxide aggregate (gmta), white-coloured min...

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