KOSTAS VERDELIS: Study Of Mineral And Matrix Maturation In Dentin (Under the direction of Adele L. Boskey and J. Timothy Wright) Spectroscopic analysis was used to study the patterns of changes in the mineral and matrix properties of dentin during maturation of the tissue. Fourier Transform Infrared Imaging (FTIRI) analyses on undecalcified semi-thin sections from fetal bovine incisors and deve...

OBJECTIVES Different surface treatments may affect bonding performance of adhesive systems to dentin. This study evaluated the influence of different methods of surface treatment on adhesion of bonding agents to dentin. METHODS Dentin surfaces abraded with #600-grit SiC paper were used as control. Three methods of surface treatment (sono-abrasion, air-abrasion and Er:YAG laser irradiation) we...

The purpose of this study was to evaluate the prepared dentin surface and to determine whether or not it is possible to seal the dentinal tubules, after different cavity disinfectant applications. Thirty mandibular molars were sectioned parallel to the occlusal plane to expose the midcoronal dentin. All of the teeth were divided into five groups (n = 6 per group): (1) in group OZ, the dentin su...

Several reports have indicated that resin bond strengths to noncarious sclerotic cervical dentine are lower than bonds made to normal dentine. This is thought to be due to tubule occlusion by mineral salts, preventing resin tag formation. The purpose of this review was to critically examine what is known about the structure of this type of dentine. Recent transmission electron microscopy reveal...

OBJECTIVE This study analyzed the adhesive-dentin interface when Nd:YAG and Er:YAG lasers were applied to dentin. BACKGROUND DATA Lasers applied to dentin cause morphological changes of this tissue. Because adhesive systems bond to dentin through the hybrid layer, it is important to investigate the adhesive-dentin interface when dentin is irradiated with lasers. METHODS The occlusal dentin ...

We studied the allergic reaction of guinea pigs to glyceryl methacrylate (GM), hydroxyethyl methacrylate (HEMA) and meso-erythritol methacrylate (EM), which are used as dentin primers. On the 18th day of the application test, when macroscopic investigation revealed an inflammatory reaction, the methacrylic acid-treated group showed marked eschar formation in comparison with the control group. I...

INTRODUCTION Maintaining or regenerating a vital pulp is a preferable goal in current endodontic research. In this study, human dental pulp cell aggregates (spheres) were applied onto bovine and human root canal models to evaluate their potential use as pre-differentiated tissue units for dental pulp tissue regeneration. METHODS Human dental pulp cells (DPC) were derived from wisdom teeth, cu...

OBJECTIVES First to compare different dentin bonding agents' shear bond strength to primary and permanent dentin. Secondly to compare the fracture failure modes and making an attempt to develop a statistical model that could be helpful in predicting them. METHODS Extracted human primary and permanent molars were used as substrates (dentin). The shear bond strength of composite to substrate wa...

BACKGROUND Dentin dysplasia type I is characterized by a defect of dentin development with clinical normal appearance of the permanent teeth but no or only rudimentary root formation. Early loss of all teeth and concomitant underdevelopment of the jaws are challenging for successful treatment with dental implants. METHODS A combination of sinus lifting and onlay bone augmentation based on tre...

Non-thermal atmospheric pressure plasmas (NT-APPs) have been shown to improve the bond strength of resin composites to demineralized dentin surfaces. Based on a wet-bonding philosophy, it is believed that a rewetting procedure is necessary after treatment with NT-APP because of its air-drying effect. This study investigated the effect of 'plasma-drying' on the bond strength of an etch-and-rinse...