Effects of whitening gels on color and surface properties of a microhybrid and nanohybrid composite.

The aim of this study was to compare color changes, surface roughness and gloss of a microhybrid and nanohybrid composite whitened in a simulated in-office or at-home procedure using 40% hydrogen peroxide or 16% carbamide peroxide, respectively. CIELab coordinates were measured before, during and after treatment using VITA EasyShade V (VITA) and ∆E calculated. Surface roughness was measured using a surface roughness tester (SJ210; Mitutoyo).

Magnesium sulfate reduces formalin-induced orofacial pain in rats with normal magnesium serum levels.

Background: In humans, orofacial pain has a high prevalence and is often difficult to treat. Magnesium is an essential element in biological a system which controls the activity of many ion channels, neurotransmitters and enzymes. Magnesium produces an antinociceptive effect in neuropathic pain, while in inflammatory pain results are not consistent.

Postoperative sensitivity associated with low shrinkage versus conventional composites.

Introduction: Postoperative sensitivity in restorative dentistry can be related to preparation trauma, dentin adhesives' ability to seal open dentinal tubules, deformation of restorations under occlusal stresses and microleakage.

Objective: The study assessed possible reduction in postoperative sensitivity with low shrinkage compared to conventional composites using different bonding agents and the influence of the operator skill on the incidence of postoperative sensitivity.

Methods: Nine hundred and sixty permanent premolars and molars with primary carious lesions from patients 21 to 40 years old were used.

[Root canal treatment of mandibular second premolar tooth with taurodontism].

Introduction: Taurodontism is a morphoanatomical change in the shape of a tooth. An enlarged body of a tooth with smaller than usual roots is a characteristic feature. Internal tooth anatomy correlates with this appearance, which means that a taurodontal tooth has a large pulp chamber and apically positioned furcations.