OBJECTIVES To determine the static load-bearing capacity of direct composite onlay restorations made of novel filling composite resin system which combines short fiber-reinforced composite resin (FC) and conventional particulate filler composite resin (PFC). METHODS Three groups of onlay restorations were fabricated (n = 8/group); Group A: made from conventional particulate filler composite r...

It known that teachers as educators should have competence that shows its quality so that the lecture material provided can be absorbed by the student. The competencies in this term include the pedagogic, professional, personality, and social. The competence that owned by lecturer can be obtained from the results of the assessment conducted by the student through the filling of the questionnair...

OBJECTIVE The aim of this study was to compare the presence of voids in root fillings performed in oval and ribbon-shaped canals with two root filling techniques, lateral compaction technique (LCT) or hybrid technique (HT), a combination of a gutta-percha masterpoint and thermoplastic gutta-percha. Furthermore, the obturation time for the two techniques was evaluated. MATERIALS AND METHODS Si...

AIM The study was designed to quantitatively evaluate the quality of root canal preparation and root canal obturation in canals treated with either rotary or self adjusting files, using three-dimensional micro-computed tomographic (CT) analysis. METHODOLOGY Pair-matched root canals were instrumented with either rotary nickel-titanium files or self-adjusting files following the manufacturers' ...

The Cro protein from bacteriophage has a dimeric fold that evolved from an ancestral allmonomer. The sequence mutations responsible for this dramatic structural evolution are unknown. Here we use analysis of sequence alignments to show that Ala-33, a small side chain in the hydrophobic ‘‘ball-and-socket’’ dimer interface of Cro, was a much larger tryptophan side chain at a previous point in evo...

Titanium Nitride (TiN) films were synthesized on AISI52100 bearing steel surface employing plasma immersion ion implantation and deposition (PIIID) technique. X-ray diffraction (XRD) proves that TiN phase exists in the surface layer. The depth profiles and chemical bonds were analyzed with X-ray photoelectron spectroscopy (XPS) combined with Ar ion etching. Atomic force microscope (AFM) reveals...

To assess left ventricular (LV) diastolic filling at rest in patients with coronary artery disease (CAD), we analyzed high-resolution time-activity curves (10-20 msec/frame) obtained from gated radionuclide angiograms in 231 patients. Peak LV filling rate (PFR), expressed in end-diastolic volumes per second (EDV/sec), was subnormal in CAD patients (1.8 +/- 0.6 [+/- SD] vs normal mean of 3.3 +/-...

OBJECTIVES To evaluate radiographically the quality of root canal fillings and compare manual and rotary preparation performed on extracted teeth by undergraduate dental students. STUDY DESIGN A total of 561 premolars and molars extracted teeth were prepared using nickel-titanium rotary files or manual instrumentation and filled with gutta-percha using a cold lateral condensation technique, b...

30 INTERNATIONAL DENTISTRY – AUSTRALASIAN EDITION VOL. 7, NO. 2 Nanotechnology, on the other hand, has made successful inroads into modern composite technology and continues to be the subject of considerable research work1,12,13. Nanosized inorganic fillers enable the filler content of composite pastes to be maximised while retaining excellent clinical handling properties and at the same time m...