نتایج جستجو برای: marginal

تعداد نتایج: 41029  

ژورنال: مجله دندانپزشکی 2004
خدادادی, رضا, رکنی, شهین, نجفی پور, محمد,

Statement of Problem: In order to eliminate the esthetic problem of metal collar in porcelain fused to metal crowns various techniques, such as shoulder porcelain, have been suggested. Purpose: The aim of this study was to investigate the effects of repeated porcelain firing cycles on the marginal integrity of shoulder in porcelain fused to metal crowns, made of two kinds of alloys: noble and b...

Background and purpose: One of the major challenges for dentists is providing the patients with a crown of appropriate marginal fit and marginal gap. Preparation of a 135° finish line has some advantages such as technical ease and appropriate finish line record. Nevertheless, few studies investigated this type of finish line. The current study aimed at comparing marginal fit and marginal gap in...

ژورنال: مجله دندانپزشکی 2016
سیادت, حکیمه, شمشیری, احمدرضا, عامری, نرگس, علی‌ خاصی, مرضیه,

Background and Aims: Marginal accuracy is a crucial factor influencing the clinical long-term reliability of implant-supported fixed dental prostheses (FDPs). The aim of this in vitro study was to evaluate the marginal fit of three-unit zirconia bridge frameworks fabricated using two different computer-aided design (CAD)/ computer-aided manufacturing (CAM) systems (AmannGirrbach and Zirkonzahn...

Journal: :بهداشت و توسعه 0
سیده صدیقه حسینی جبلی آیدین آرین خصال محسن بارونی پروانه حیدری ارجلو مهدی خاکیان

background: owing to the growing importance of medicines in treatment of diseases, as well as their role as alternatives for expensive and often unsafe procedures; economic examination of factors associated with their demand is necessary. hence, this study aimed at exploring factors affecting the demand of specialty medicines.   methods: in this descriptive-analytic study, data was collected fr...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
محمدحسن سالاری mohammad-hossein salari dental school, islamic azad university, tehran-iranدانشکده دندانپزشکی، دانشگاه آزاد اسلامی، واحد تهران عزت ا... جلالیان ezzat'ollah jalalian dental school, islamic azad university, tehran-iran ([email protected])دانشکده دندانپزشکی، دانشگاه آزاد اسلامی، واحد تهران سارا عسگریان sara asgarian

background and aim: metal ceramic restorations are widely used in crowns. the marginal fitness of these artificial crowns is prone to alteration during the firing cycle of porcelain. gold electroformed metal-ceramic restorations have been introduced as alternatives to conventional metal-ceramic restorations. however little is known about the relationship between procelain firing procedures and ...

Abstract : There are several methods to cover the costs of a transmission system and distribution networks. These methods are divided into either incremental or marginal approaches, which can be either long-term or short-term. The main difference between the incremental and marginal approach is how to calculate the cost of using the network. In the incremental approach, simulation and in the ma...

Journal: :dental research journal 0
tahereh ghaffari fahimeh hamedi‑rad vahid fakhrzadeh

background: this in vitro study investigated the marginal fit of two porcelain laminate veneers to help the selection of more accurate veneers in discolored teeth. materials and methods: thirty impressions of metal master die created from the prepared labial surface of an acrylic maxillary central incisor were made and poured with type iv stone. the dies were distributed into test groups (n = 1...

ژورنال: مجله دندانپزشکی 2019

Background and Aims: Despite the increasing application of intra-oral scanners, the effect of finish line position on gingival margins adaptation is still discussed. The purpose of this clinical study was to evaluate the fitness of cobalt-chromium copings obtained from intraoral scanning in two depth of finish lines. Materials and Methods: Thirty teeth prepared for single premolar metal-cerami...

2015
M. N. M. van Lieshout

This paper is concerned with combined inference for point processes on the real line observed in a broken interval. For such processes, the classic history-based approach cannot be used. Instead, we adapt tools from sequential spatial point processes. For a range of models, the marginal and conditional distributions are derived. We discuss likelihood based inference as well as parameter estimat...

1994
Werner Vach Kirstin Schulz

Zeger and Liang (1992) allege that regression parameter estimates from transition models tend to be smaller in absolute value than regression parameter estimates from marginal models. This statement is true in typical longitudinal data situations for the relation between the true parameters of the marginal and transition model. However, under the assumption of a transition model the Generalized...

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