George Eliades

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The purpose of this study was to qualitatively and quantitatively assess the nickel, chromium, and ferrous levels in a population of 17 orthodontic patients undergoing treatment, compared with seven untreated individuals, employing a novel methodological approach and a new analytical technique. Salivary samples obtained from patients before and after(More)
OBJECTIVE The aim of this study was to investigate the relationship between the degree of conversion (DC) and shrinkage strain values of two representative resin-composites when irradiated by two light intensity levels, for different time periods. METHODS The DC of Z100 and Tetric Ceram was measured by FTIR spectroscopy immediately post-cure and shrinkage(More)
The purpose of this study was to assess quantitatively the roughness of the enamel surface following debonding using two resin removal methods. The enamel surface of 30 premolar crowns was covered with black tape with a 3 mm window on the middle buccal third to standardize the area of analysis. The initial enamel surfaces were subjected to profilometry,(More)
AIM To evaluate the elemental composition, microstructure and hardness of Ni-Ti endodontic instruments and to assess the relevance of shape memory and superelastic properties. METHODOLOGY Ten brands of Ni-Ti endodontic instrument were evaluated (EndoSequence, Ergoflex K, FlexMaster, Hero 642, Hyflex X-File, K3 Endo, Liberator, NRT, Profile and ProTaper).(More)
OBJECTIVES The aim of this study was to compare the morphological appearance and the molecular composition of intraoral integuments formed in situ on germanium (Ge) crystals in the presence or absence of the commercially available casein-phosphopeptide-amorphous calcium phosphate (CPP-ACP) cream agent. METHODS Six volunteers participated in the study.(More)
The formulation of a dentine bonding system requires several properties which control the performance of the adhesive film. Numerous tests have been introduced for material screening purposes. Understanding the clinical relevance of the formulation principles and laboratory testing pertinence to in vivo conditions are of great importance in order to(More)
OBJECTIVES An experimental method was used to assess the glass ionomer and resinous character in three "dual-cure" (Fuji II LC, Photac-Fil, Variglass) and a "triple-cure" (Vitremer) resin-modified glass ionomer restoratives to evaluate their acid-base and free-radical setting mechanisms. METHODS Four groups (A-D) of three specimens (5 x 4 x 1 mm) were(More)
OBJECTIVES The aim of this study was to investigate the effect of different light-curing units and irradiation modes on the mechanical fatigue strength and degree of conversion of a restorative resin composite. METHODS Conventional halogen, plasma arc and blue LED light-curing units were used for polymerization of a resin composite (Tetric) Ceram,(More)
OBJECTIVE To evaluate the in vivo vs the in vitro anticariogenic potential of glass-ionomer and resin composite restoratives, utilizing a standardized interfacial gap model. METHODS (a) In vitro study. Box shaped cavities were prepared at the buccal surfaces of extracted premolars limited to enamel. The incisal cavity walls received no treatment and were(More)
The structure and morphological condition of retrieved NiTi orthodontic archwires was evaluated and any possible alterations in the surface composition of the alloy following 1-6 months in vivo were characterized. NiTi wires (GAC, German Orthodontics, ORMCO) of various cross-sections were collected through a retrieval protocol and were subjected to(More)