K E Y W O R D S dentistry, enamel, fissure caries, confocal laser scanning microscopy, tomography, microradiography, acid fuchsin A C K N O W L E D G E M E N T S Thanks to Mr Y. Ito and Dr K. Masuno for their collaboration in the elaboration of histological slides and to Mr J. Fujita for his collaboration with English translation. A U T H O R D E TA I L S Dr T. Nishikawa, Department of Oral Pat...

background and aims. this in vitro study was designed to evaluate the effect of composite resin types and orthodontic debonding pliers on the amount of adhesive remnants and enamel damages using a novel method of measurement. materials and methods. 120 extracted human premolars were randomly divided into four groups (n = 30). the standard edgewise metallic brackets were bonded to the teeth with...

The acid etching procedure represents a procedure that increases the bond strength between the etched enamel and the composite resin. The aim of this study was to evaluate the effect of ortho-phosphoric acid 37% on the morphology and composition of the enamel surface. The surfaces of four extracted teeth (two incisors and two premolars) were etched with 37% ortho-phosphoric acid solution for 15...

Fluorine (F) and strontium (Sr) are key elements in the de- and remineralization of teeth. To quantitatively analyze the distribution of F and Sr, micro-particle-induced gamma/X-ray emission (PIGE/PIXE) technique was used. The cavities were prepared and filled with the fluoride- and Sr-containing restorative materials (FSCMs) in extracted human molars. The single-section enamel specimens were p...

OBJECTIVE To characterise patterns of enamel thickness on deciduous (dm1, dm2) and permanent first (M1) mandibular molars and evaluate these against functional and morphological interpretative models. METHODS Histological sections of mesial and distal cusps from 69 unworn molars were produced and examined using transmitted light microscopy. Enamel cap area, dentine area, as well as average an...

There is no topically applicable low concentration fluoride delivery device available for caries prevention. This study was aimed to assess the use of a low concentration (1450 ppm) fluoride strip as an effective fluoride delivery system against enamel demineralization. The enamel surface composition and calcium-deficient hydroxyapatite or toothpaste treatments were investigated using X-ray pho...

A three-dimensional reconstruction of the rod profiles seen in inner and outer rat incisor enamel was made from serial 1 μ cross sections of a decalcified upper incisor. The enamel rod was found to be an elongated structure which travelled incisally relative to its origin and ran continuously from the dentino-enamel junction to the enamel surface. The rod was divisible into an inner and outer e...

The objective of this study was to evaluate in vitro the effect of a low fluoride toothpaste (450 µgF/g, NaF) combined with calcium citrate (Cacit) and sodium trimetaphosphate (TMP) on enamel remineralization. Bovine enamel blocks had the enamel surface polished sequentially to determine the surface hardness. After production of artificial carious lesions, the blocks selected by their surface h...

Various combinations of enamel reduction procedures can be used to create space between teeth, to correct discrepancies between mandibular and maxillary teeth and to correct morphologic anomalies during orthodontic treatment. In particular, acid-enhanced interproximal enamel reduction significantly reduces surface roughness. This article presents a review of the literature on enamel reduction p...