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P D Brandt

Publications and source records attributed to P D Brandt.

6 recordsLinked to original sources
PubMed2006

Self-etching bonding systems: in-vitro shear bond strength evaluation.

The purpose of this in vitro study was to compare the dentine shear bond strength of five self-etching bonding agents with that of a total-etch dentine bonding agent (used as control). Sixty recently extracted third molar teeth were mounted in acrylic resin and the occlusal surfaces ground to expose superficial dentine. A standardised smear layer was created by polishing with wet 600-grit SiC paper. Products evaluated were Xeno III (XIII), Clearfil SE Bond (SE), ABF (ABF), Optibond Solo Self-etch (OS), Adper Prompt-L-Pop (PLP) and the control, Scotchbond Multipurpose Plus (SBMP). Resin stubs were bonded to the dentine using the bonding agents according to manufacturer's instructions. Composite stubs were manufactured using an Ultradent jig and two increments of Z100, A1 shade composite. The bonds were subsequently stressed to failure with an Instron testing machine, operating at a crosshead speed of 0.5 mm/min. The data was statistically analysed using ANOVA (alpha < or = 0.05). The mean SBS (MPa) were: SBMP (Control) = 24.1 +/- 7.6; XIII = 17.3 +/- 4.1; SE = 26.2 +/- 7.8; ABF = 25.9 +/- 4.3; OS = 21.9 +/- 3.9 and PLP = 15.4 +/- 3.1. The shear bond strengths of both XIII and PLP to dentine were significantly lower than the control SBMP (p < 0.05). The remaining three products (SE, ABF and OS) displayed bond strengths comparable to the control (p > 0.05). Further research into cut (ground) and un-cut (un-ground) enamel shear bond strength and micro-leakage using these bonding agents are needed.

Analysis of Variance↗
PubMed2006

Self-etching bonding systems: in-vitro micro-leakage evaluation.

The purpose of this in vitro study was to compare dentine and enamel micro-leakage values of six self-etching bonding agents to that of a total etch dentine bonding agent (used as a control). Products evaluated were Scotchbond Multipurpose Plus (3M/ESPE), Xeno III (Dentsply), Clearfil SE Bond (Kuraray), ABF (Kuraray), Optibond Solo Self-Etch (Kerr), OneCoatSE Bond (Colténe Whaledent), and iBond (Heraeus-Kulzer). Using a medium sized Cerana bur (Nordiska Dental) a standard, cylindrical preparation was made at the cemento-enamel junction (CEJ) of human third molars. The teeth were randomly divided into 7 groups of ten teeth each. The bonding agents were applied and light cured strictly according to the manufacturer's instructions and the cavities then filled in two increments, using Z100 composite (3M/ESPE). The restored teeth were imbedded in acrylic resin and thermocycled between 5 degrees - 60 degrees C (+/- 2 degrees C) for 250 cycles with a dwell time of 20 seconds. All seven groups were then placed in a 5% basic Fuchsin solution for 12 hours at 37 degrees C. The embedded teeth were removed from the basic Fuchsin, rinsed well, imbedded in acrylic and cut longitudinally through the centre of each restoration using an Accutom-2 cutting machine. Each tooth was then evaluated at the occlusal enamel margin and at the cervical dentine margin for micro-leakage using a light microscope at 50x magnification. The data obtained was analysed using the Kruskal-Wallis test, with Fisher's least significant difference method used for comparison of specific groups (p<0.05). When compared to the control (Scotchbond Multipurpose Plus), results for microleakage at the occlusal enamel margins as well as the cervical dentine margins indicated that only SE Bond and ABF (Protect Bond) showed values as low as the control. It can be concluded that, as far as micro-leakage is concerned, Clearfil SE Bond and ABF (Protect Bond) self-etching bonding agents could be clinically acceptable alternatives to the clinically proven Scotch-bond Multipurpose. The other products showed more microleakage.

Acid Etching, Dental↗
PubMed2004

Anti-bacterial efficacy of new self-etching dentine bonding agent.

Since a perfect seal is not easily achieved during bonding procedures, any product which will limit or delay bacterial proliferation in the resulting micro-leakage spaces should extend the life span of bonded restorations. This study compared the antibacterial properties of an experimental, self-etching, fluoride-releasing, antibacterial bonding system (ABF) with two standard bonding systems (SE Bond and Scotchbond MP). Spread plates of three different bacteria (Streptococcus mutans, Lactobacillus paracasei and Actinomyces naeslundii) were prepared on Brain-Heart Infusion agar. Standardised, sterilised filtration paper disks were infiltrated with 20 microl of primer and then placed on the inoculated agar and incubated at 37 degrees C for 48 hours. The extent of the inhibition zones were measured at different positions and data were analysed using the Student t-test to determine significant differences. All three primers showed zones of inhibition for all three bacteria tested. Inhibition zones for ABF primer against S. mutans were significantly larger (p<0.05) compared to that of Scotchbond MP and SE Bond. In general the antibacterial activity of the three primers against the three bacteria tested varied, and the inhibitory effect for the experimental primer was significantly superior against S. mutans only.

Actinomyces↗