PURPOSE The aim of this study is to evaluate the appropriate impression technique by analyzing the superimposition of 3D digital model for evaluating accuracy of conventional impression technique and digital impression. MATERIALS AND METHODS Twenty-four patients who had no periodontitis or temporomandibular joint disease were selected for analysis. As a reference model, digital impressions wi...

BACKGROUND This study evaluated in vivo the accuracy of metal (Smart®) and plastic (Triple Tray®) dual-arch trays used with vinyl polysiloxane (Flexitime®), in the putty/wash viscosity, as well as polyether (Impregum Soft®) in the regular viscosity. MATERIALS AND METHODS In one patient, an implant-level transfer was screwed on an implant in the mandibular right first molar, serving as a patte...

Introduction also be used for multiple restorations! or fixed partial dentures up to four units. However, if the most posterior tooth in the arch is prepared for a fixed partial denture, the patient may close at a decreased vertical dimension of occlusion, which would result in a significant negative occlusal error. Care must be excercised when this type of impression tray is used. Before the i...

PURPOSE A variety of impression trays are used in the fabrication of fixed indirect restorations. Impressions used in the construction of fixed indirect restorations were examined for tray type, manner of use, and overall impression quality. MATERIALS AND METHODS A commercial dental laboratory provided 1403 impressions used to fabricate fixed indirect restorations during a 3-month period. Imp...

AIMS To evaluate the accuracy of dies made from dual arch impressions using different sectional dual arch trays, combinations of elastomeric impression materials, and the sequence of pour of dies. SUBJECTS AND METHODS The dual arch impression materials were grouped into three groups depending on the combination of impression materials used and each group is subdivided into four subgroups. A s...

Purpose: This study compared the reproducibility of dual-arch impression technique with conventional impression techniques. Materials and Methods: Full-crown preparation was completed on posterior teeth of fresh porcine upper jaws. Dual-arch impression was made immediately after the preparation without gingival retraction cord or triple-tray (experimental group), followed by conventional 1-step...

STATEMENT OF PROBLEM Success rates for making fixed prosthodontic impressions based on material and tray selection are not known. PURPOSE The purpose of this clinical study was to compare first impression success rates for 2 types of impression material and 2 impression tray systems. MATERIAL AND METHODS Dual-viscosity impressions were made with a vinyl polysiloxane (VPS) (Aquasil Ultra Mon...

We are interested in proposing approximations of a sequence probability measures the convex order by finitely supported still order. propose to alternate two types operators: transition according one-step martingale Markov kernel mapping measure its successor and spatial discretization through dual (also called Delaunay) quantization. In case autoregressive conditional heteroskedasticity (ARCH)...

A young man presented with hoarseness of voice and was found to have left vocal cord paralysis and a large opacity on chest X-ray in the left upper zone. CT angiography showed a giant aneurysm of the aortic arch involving the left subclavian artery. Using a dual perfusion system, with the femoral bypass circuit taking care of the spinal protection and the aortic bypass circuit providing the cer...