Flexural strength and microhardness of anterior composites after accelerated aging.

Background: This study aimed to evaluate the flexural strength and microhardness of three different anterior composites after 10 000 thermocycles.

Material And Methods: The mechanical properties of a nano-fill composite (Filtek Ultimate Universal Restorative (FUR) (Enamel)), a nano-hybrid composite (Clearfil Majesty ES2 (ES2) (Enamel)), and a micro-hybrid composite (G Aenial Anterior (GAA)) were investigated in this study. For the microhardness test, 8-mm diameter and 2-mm thickness composite discs were used (n = 10), and for the flexural strength test, 25x2x2 mm bar-shaped specimens were prepared (n = 13).

Influence of polymerisation method and type of fibre on fracture strength of endodontically treated teeth.

The aim of this study was to investigate (i) the effect of direct or indirect polymerisation of adhesive-impregnated ribbon fibre under 4-mm bulk-filled composites on fracture strength; (ii) to compare polyethylene ribbon fibre-reinforcement composites with short fibre-reinforced composite; and (iii) the effectiveness of polyethylene ribbon fibre according to the restorative materials used (low-viscous bulk-fill composite, high-viscous flowable composite or conventional paste composite). Seventy molars were divided into seven groups; (groups 1-2) Ribbond-reinforced Surefil-SDR; (group 3) Ribbond-reinforced G Aenial Flo; (group 4) Ribbond-reinforced G Aenial Posterior; (group 5) short fibre-reinforced composite everX Posterior; (group 6) unfilled cavity; (group 7) intact teeth. Ribbond was adopted to cavity walls by impregnating an adhesive and using a flowable composite.

Evaluation of the surface hardness, roughness, gloss and color of composites after different finishing/polishing treatments and thermocycling using a multitechnique approach.

The objectives of this study were to evaluate the mechanical and physical properties of resin composites. The materials evaluated were the Clearfil Majesty Posterior, Filtek Z550 and G-aenial Posterior composites. A total of 189 specimens were fabricated for microhardness, roughness, gloss and color tests.

The effect of different drinks on the color stability of different restorative materials after one month.

Objectives: The aim of this study was to evaluate the effect of three different drinks on the color parameters of four different restorative materials.

Materials And Methods: Three different composites (Filtek Ultimate Universal Restorative, Filtek Ultimate Flowable, and Filtek Silorane, 3M ESPE) and a polyacid-modified composite resin material (Dyract XP, Dentsply DeTrey GmbH) were evaluated. Eighty-four disc-shaped specimens of 8 mm in diameter and 2 mm in thickness were prepared (n = 21 each).

Clinical features of migraine: a cross-sectional study in patients aged three to sixty-nine.

We investigated 260 consecutive patients classified as migraine cases aged 3-69 at two tertiary headache centres, one for children and adolescents and the other for adults to evaluate the relationship between age and clinical features of migraine cross-sectionally. We only included subjects with definite migraine without or with aura and we excluded subjects with coexisting tension-type headache, medication overuse and/or other clinically relevant disorders. The percentage of males decreased markedly from childhood to adulthood and this affected the evaluation of age-related changes in male patients, as only large differences reached the level of statistical significance.

[Validation of the German version of the 20-item Toronto Alexithymia Scale in normal persons and psychiatric patients].

This paper describes the cross-validation of the German version of the 20-Item Toronto Alexithymia Scale (TAS-20) in normal adults (n = 306) as well as in a psychiatric inpatients sample (n = 101). The scale showed adequate estimates of internal consistency, split-half and test-retest reliability, and a three-factor structure comparable to that obtained for the English version of the TAS-20 which was found to be consistent with the main features of the alexithymia construct. Evidence of convergent validity of the German TAS-20 was demonstrated by significant positive correlations with conceptual related psychometric scales.