Publications by authors named "Igor L Stojanac"
The objective of this study was observation of the adhesive interface on original tooth samples, as well as their epoxy replicas, under SEM. A light-cure flowable composite was incrementally placed and light-polymerized in previously prepared cylindrical dentinal cavities on the buccal surfaces of extracted human third molars. After finishing procedures, impressions of the composite/dentin margin were made using polyvinylsiloxane in order to obtain accurate epoxy replicas for SEM analysis.
View Article and Find Full Text PDFArticle Synopsis
- - The study aimed to assess how the method of placement and polymerization of composite materials affects the gap between dentin and the restoration in teeth.
- - Thirty extracted molar teeth were filled using three different techniques (bulk, incremental, pin) and various light polymerization methods, after which gaps were measured and statistically analyzed.
- - Results showed that using a modified incremental technique with a transparent glass pin led to better marginal adaptation and less leakage compared to the other methods, potentially improving the longevity of dental restorations.
The aim of this study was to analyse the interfacial micromorphology of total-etch adhesives and dentin structures different locations by using SEM. Standardized cylindrical cavities (3mm in diameter, 2mm deep) with all margins in dentin were prepared on occlusal and buccal surfaces of twenty extracted human third molars. A total-etch dentin adhesive system and a light-cure flowable composite (Filtek Ultimate Flowable, 3M ESPE, St.
View Article and Find Full Text PDFObjective: In this study we analyze viscoelastic properties of three flowable (Wave, Wave MV, Wave HV) and one universal hybrid resin (Ice) composites, prior to setting. We developed a mathematical model containing fractional derivatives in order to describe their properties.
Methods: Isothermal experimental study was conducted on a rheometer with parallel plates.
Objective: The aim of this study is to develop fractional derivative models for the assessment of viscoelastic properties related to handling characteristics of dental resin composites belonging to two classes: flowable (Revolution Formula 2 and Filtek Ultimate) and posterior "bulk-fill" flowable base (Smart Dentin Replace).
Methods: Rheological measurements on all materials tested in this study were performed using dynamic oscillatory rheometer at temperature of 23°C. A parallel plates module with a diameter of 20mm was used to measure the properties of the resin composites tested.
Objectives: To reduce the effect of stresses due to volumetric shrinkage the authors propose an incremental technique for placing composite restorations.
Methods: The goal of the method is to reduce the volume of the resin that is polymerized and eliminate a stress singular point in the resin that is positioned at the geometric center of the cavity. This is achieved by a two step type incremental technique.