AIM To compare the cusp fracture resistance of teeth restored with composite resins and two post systems. METHODOLOGY Eighty extracted single-rooted human maxillary premolars were randomly assigned to eight groups (n = 10). Group 1 (control) did not receive any preparation. From groups 2 to 8, the teeth were root filled and mesio-occluso-distal (MOD) cavities were prepared. Group 2 remained u...

The etch rates of GaAs and Al,Ga] _xAs (x = 0.09-1) in C2H6/H2 were investigated as a function oftime 0-12 min), gas flow rate (5-25 seem), total pressure (4-30 mTorr), plasma power density (0.56-1.32 W em2 ), and percentage ofC2H 6 in the discharge (1O%-50%). The etch rates are constant with time, and decrease with increasing Al content in the AIGaAs. The maximum etch rates occur at 25% by vol...

AIM To evaluate whether application of a total-etch/separate adhesive layer can enhance the bond of a UDMA-based sealer to dentine. METHODOLOGY The root canals of 20 decoronated maxillary premolar teeth with two canals were prepared to size 35-45, 0.04 taper using rotary NiTi instruments. The canals of each tooth were treated with application of either a total-etch/separate adhesive or the ma...

AIM This study evaluated and compared the role of newer dental adhesives to bond composite resin to the resin modified glass ionomer (RMGIC) liner. MATERIALS AND METHODS Thirty-six specimens were prepared on acrylic blocks, with wells prepared in it by drilling holes, to retain the RMGIC. The specimens were randomly divided into three groups of 12 specimens each. In group I, a thin layer of a...

INTRODUCTION The use of self-etch primers has increased steadily because of their time savings and greater simplicity; however, overall benefits and potential disadvantages and harms have not been assessed systematically. In this study, we reviewed randomized controlled trials to assess the risk of attachment failure, bonding time, and demineralization adjacent to attachments between 1-stage (s...