نتایج جستجو برای: coronal seal

تعداد نتایج: 27644  

ژورنال: مجله دندانپزشکی 2007
 استاد, سید ناصر , ضرابیان, محمد , عباسی, منصوره , محسنی, مهران ,

Background and Aim: Root filling materials are usually in close contact with living tissues. So their biological properties like mutagenicity and cytotoxicity are important. These properties help us determine the potential damage to periapical tissues, or potential DNA mutations, and malignant transformation of the cells. The aim of this study was to evaluate the mutagenicity and cytotoxicity o...

Journal: :Journal of the Bahrain Medical Society 2022

Background: Endodontic flare up is a common complication of endodontic treatment that results from acute exacerbation pulpal and peri-radicular pathosis; leading to unscheduled emergency visits disturbing for both clinicians patients. Flare causes are multifactorial includes microbial, host, chemical mechanical factors. Objective: The aim this retrospective study was evaluate the incidence iden...

Journal: :Chest 2005
Robert J Cerfolio Ayesha S Bryant Satinder Singh Cynthia S Bass Alfred A Bartolucci

BACKGROUND Placing chest tubes to water seal is superior for patients with an air leak, but when a patient has a pneumothorax and an air leak the best chest tube setting is unknown. METHODS This is a retrospective analysis of a prospective database on a consecutive series of patients who had a pneumothorax and air leak on the same day. Patients underwent elective pulmonary resection by one su...

Journal: :CoRR 2018
Shelby Kimmel Shimon Kolkowitz

We introduce the concept of a quantum “seal” and investigate its feasibility. We define a seal as a state provided by Alice to Bob along with a set of instructions which Bob can follow in order to “break the seal” and read the classical message stored inside. We define two success criteria for a seal: the probability Bob can successfully read the message if he follows Alice’s instructions witho...

Journal: :IEEE Trans. Contr. Sys. Techn. 2002
Joshua Dayan Min Zou Itzhak Green

Wear and failure of mechanical seals may be critical in certain applications and should be avoided. Large relative misalignment between the seal faces is the most likely cause for intermittent contact and the increased friction that eventually brings failure. Adjustment of the seal clearance is probably the most readily implemented method of reducing the relative misalignment and eliminating se...

2012
Jason D. Baker Evan A. Howell Jeffrey J. Polovina

Abundance trends of Hawaiian monk seals Monachus schauinslandi at 6 subpopulations throughout the Northwestern Hawaiian Islands (NWHI) have fluctuated considerably during the past 5 decades. Direct human impacts have been widely accepted as the primary cause of previous monk seal population declines and, consequently, much conservation effort has focused on minimizing these threats. Yet climate...

2003
Richard M. Jones

Fault sealing is one of the key factors controlling hydrocarbon accumulations and trap volumetrics and can be a significant influence on reservoir performance during production. Fault seal is, therefore, a major exploration and production uncertainty. We introduce a systematic framework in which the geologic risk of faults trapping hydrocarbons may be assessed. A fault may seal if deformation p...

2011
Girija Srikanth

This paper describes a new electronic official seal stamping based on Group Signature, USB Key. Bill/Contract in Ecommerce must be seal stamped to gain tamper proof and nonrepudiation. The seal stamping control is designed based on the certificate-based public key. This technique is more efficient for generating and verifying individual/group signatures in terms of computational efforts and com...

Journal: :iranian endodontic journal 0
amin homayoon endodontist, private practice mahmood reza hamidi department of endodontics, dental school, babol university of medical sciences, babol, iran azam haddadi zahra sadat madani ehsan moudi ali bijani

introduction: fearless removal of tooth structure during canal preparation and shaping has negative effects on the prognosis of treatment. on the other hand, sufficient pre-enlargement facilitates exact measurement of the apical size. the present in vitro study aimed to compare the efficacy of gates-glidden drills, k3, protaper, flexmaster and race instruments in dentin removal during coronal f...

2015
Kyongseok Kim Jooyoung Kim

The purpose of this study is to assess the possibility of implementing an online advertising strategy using a well-known third-party privacy seal located on the order page of an unfamiliar online retailer. An online experiment was conducted with 223 participants using a 2 (third-party seal: present vs. absent)×2 (purchase-decision involvement: low vs. high)×2 (disposition to trust: low vs. high...

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