AIM The aim of this study was to evaluate the influence of immersion period in two disinfectant solutions on dimensional change of four elastomeric impression materials. MATERIALS AND METHODS Four representative materials of each class of elastomers: Xantopren (polydimethylsiloxane-PDS), Express (polyvinyl siloxane-PVS); Permlastic (polysulfide- PS) and Soft Impregum (polyether-EP) were mixed...

OBJECTIVES This study was planned to evaluate the dimensional stability of elastomers during cold sterilization or immersion disinfection and also to evaluate the same, along with acrylic resin trays which are used in clinical practice. MATERIALS AND METHODS A study mold according to revised American Dental Association. Specification no. 19 was used. Polyether, polyvinyl siloxane (PVS) (heavy...

PURPOSE The purpose of this study was to compare the capacity of different impression materials to accurately reproduce the positions of five implant analogs on a master model by comparing the resulting cast with the stainless steel master model. The study was motivated by the knowledge that distortions can occur during impression making and the pouring of casts and that this distortion may pro...

AIM OF THE STUDY To evaluate and compare the linear dimensional changes of the three representative polyvinyl siloxane (PVS) impression materials and to compare the accuracy of single mix with double mix impression technique. METHODOLOGY A study mold was prepared according to revised American Dental Association specification number 19 for nonaqueous elastic dental impression materials. Three ...

INTRODUCTION With increasing use of digital scanning with restorative procedures in the dental office, it becomes necessary that educational institutions adopt instructional methodology for introducing this technology together with conventional impression techniques. OBJECTIVE To compare the time differences between instructing dental students on digital scanning (DS) (LAVA C.O.S. digital imp...

Abstract Background In the South Indian population, an odontometric analysis was performed with older age group (18 to 60 years) and using dimensionally stable polyvinyl siloxane elastomeric impression material (PVS) that can create minute detail replicas of tooth structure. Both measurements buccolingual mesiodistal dimensions all permanent teeth (except third molars) were taken a digital vern...

OBJECTIVES The aim of this study was to investigate the internal fit (IF) of glass-infiltrated alumina (ICA--In-Ceram Alumina), yttria-stabilized tetragonal zirconia polycrystals (Y-TZP--IPS e.max ZirCAD), and metal-ceramic (MC--Ni-Cr alloy) crowns. MATERIAL AND METHODS Sixty standardized resin-tooth replicas of a maxillary first molar were produced for crown placement and divided into 3 grou...

BACKGROUND Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques. MATERIALS AND METHODS Three acrylic resin mandibular master models with four parallel implants were used: Biohorizons (BI...

AIMS: To compare accuracy and dimensional stability of 3 inter occlusal recording materials , as a function of time. Method of study 3 commercially available inter occlusal recording materials investigated in this study were chemically bite registration wax, bis acrylic and polyvinylsiloxane. A mold of ADA specification no 19 was used. Samples of 10 specimen each were made. Specimen were disc s...