Search results for "IMPR"

Le tweet stratégique: Use of Twitter as a PR tool by French politicians

2015

Edited By Dejan Verčič, Ana Tkalac Verčič, Krishnamurthy Sriramesh and Jon White; National audience; This study, adopting a qualitative approach to political communication, looks in depth at the way Twitter is used as a PR tool by five French politicians. It suggests that the microblogging service plays a specific role in allowing them to monitor public opinion and current affairs, to interact with voters, journalists, stakeholders and other politicians and to disseminate information. The way politicians use Twitter is influenced by concerns of impression management (content and style of tweets), and also various institutional, political and social/symbolic limits, which contribute to revea…

Organizational Systems: Managing Complexity with the Viable System Model (Book review)

2013

Il traffico di essere umani e i network del contrabbando tra Libia e Italia

2016

La recente diffusione da parte dell’Organizzazione Internazionale per le Migrazioni di nuovi dati sui morti e dispersi nel Mediterraneo, 2.734 nei primi otto mesi del 2016 con oltre 115.000 rifugiati, migranti e richiedenti asilo sbarcati sulle coste italiane nello stesso periodo, conferma come la rotta del Mediterraneo centrale sia tornata a essere la principale via di accesso all’Europa. La questione ha dimensioni mondiali e l’Italia, per la sua posizione e conformazione geografica, con confini di terra con Francia, Svizzera, Austria e Slovenia, e 7.600 chilometri di coste in posizione centrale nel Mar Mediterraneo, è divenuta sin dai primi anni Novanta un territorio di arrivo e di transi…

Accuracy of the implant impression obtained from different impression materials and techniques: review

2011

With the predictable integration of implants, the emphasis is shifted towards precise prosthesis. Reproducing the intraoral relationship of implants through impression procedures is the first step in achieving an accurate, passively fitting prosthesis. The critical aspect is to record the three dimensional orientation of the implant as it is present intraorally, other than reproducing fine surface detail for successful implant prosthodontic treatment. The development of impression techniques to accurately record implant position has become more complicated and challenging. During the prosthetic phase of implant therapy there are numerous options available to the implantologist in relation t…

Comparative analysis of trueness between conventional and digital impression in dental-supported fixed dental prosthesis with vertical preparation

2020

Biologically oriented preparation technique (BOPT) is a vertical preparation technique without a finish line to create a new anatomic crown with a prosthetic emergence profile. This case report describe the protocol realized digitally in a patient who required a new fixed partial denture (FPD) in the anterior esthetic zone. After time of temporary restoration, definitive conventional (CI) (double-cord retraction and vinyl polysiloxane material), and digital impression (DI) with three different intraoral scanner (IOS) (Trios®, True Definition® and iTero®) were taken. All digital impression were obtained through three different scans: temporary restoration in the mouth after healing period, p…

A Novel Digital Technique for Measuring the Accuracy of an Indirect Bonding Technique Using Fixed Buccal Multibracket Appliances

2021

The aim of this study was to analyze the accuracy and predictability of the indirect bonding technique of fixed buccal multibracket appliances using a customized iterative closest point algorithm. Materials and Methods: A total of 340 fixed buccal multibracket appliances were virtually planned and bonded on 34 experimental anatomically based acrylic resin models by using orthodontic templates designed and manufactured to indirectly bond the fixed buccal multibracket appliances. Afterwards, the models were submitted to a three-dimensional impression technique by an intraoral scanner, and the standard tessellation language digital files from the virtual planning and the digital impression wer…

A comparison of the marginal adaptation of composite overlays fabricated with silicone and an intraoral scanner

2021

Background Intraoral scanners have been developing during last years. The aim of this study was to know if digital impressions achieve a marginal adaptation in overlays as well as conventional impressions with silicone. Material and methods Sixty-two extracted molars were selected. The samples were prepared for MOD overlays. The teeth were divided into two groups (n=31). Group 1: impressions were made with silicone (Express™ Impression, 3M ESPE) and overlays were manufactured with Sinfony composite (3M ESPE) by the laboratory technician. Group 2: impressions were taken with the scanner True Definition (TD, 3M ESPE) and under Lava Ultimate CAD/CAM Restorative composite (3M ESPE) were produce…

Comparative evaluation of the effect of impression materials and trays on the accuracy of angulated implants impressions

2018

Background Vinyl Polyether Siloxane is a newly introduced impression material and studies on that is scarce. Implant insertion in posterior mandible might be angulated due to anatomical considerations. The purpose of this study was to compare the dimensional and angular accuracy of impressions using full-arch versus sectional tray and Vinyl Polysiloxane versus Vinyl Polyether Siloxane in angulated implants. Material and Methods Four implants were placed in dental areas #19, #21, #28 and #30 of a Kennedy class I mandibular acrylic model with 30° lingual angulation. Twenty sectional and 20 full-arch open trays were made on the primary cast. Impressions were taken using Vinyl Polysiloxane and …

Comparison of the accuracy of intraoral digital impression system and conventional impression techniques for multiple implants in the full-arch edent…

2020

Background Several impression techniques, especially in combination with computer-aided design and computer-aided manufacturing (CAD/CAM), are used in increasing the accuracy of dental implantology and decreasing patient discomfort. The study was designed to examine the accuracy of the digital impression (DI) of multiple implants with an intraoral scanner (IOS) and compared with that of a conventional impression (CI). Material and methods Four dental implants were placed in teeth area #33, #36, #43 and 46# of the mandibular full-arch model. The implanted model was replicated by IOS and CI after fitting of scannable abutments over the implant screws. Then, a small hole was made on the scan r…

Evaluation of accuracy of various impression techniques and impression materials in recording multiple implants placed unilaterally in a partially ed…

2018

Background Various factors like implant angulation, type of impression material and tray type affects the implant impression accuracy. To date limited in-vitro studies were carried out on the implant impression accuracy of unilateral partially edentulous arches. The aim of this research was to evaluate the effects of 0o, 15o and 25o implant angulations on impression accuracy in simulated master casts of unilateral partially edentulous situation using different impression materials and tray selections. Material and Methods 30 replicas (N = 30) of a resin matrix (control) containing four implant analogues placed unilaterally from the midline till the region of second molar at an angulation of…