Jean-François ROULET
DDS, DMD, PhD, Dr hc, Prof hc, Professor, Chair
Department of Restorative Dental Sciences
College of Dentistry, University of Florida
Gainesville, FL, USA
CV
Jean-François Roulet, DDS, Dr med dent, Dr hc, PhD, is the former chair and current professor of the Department of Restorative
Dental Sciences at the University of Florida. Professor Roulet is author/coauthor of more than 180 papers, edited/contributed
to 27 textbooks and mentored more than 150 theses. He is a renowned international lecturer with over 800 appearances to
date. Dr. Roulet is a member of many professional organizations, has won numerous awards, and holds four patents. He is
editor of the Prophylaxe Impuls and Stomatology Edu Journal. His areas of interest include minimally invasive dentistry, dental
materials (ie, composites and ceramics), adhesive dentistry, esthetic dentistry, and application concepts in preventive dentistry.
Questions
1. A beam profile is:
q a.
q b.
q c.
q d.
The change if irradiance as a function of the distance from the light curing unit light outputting window;
The 2D irradiance intensity plot of a light beam at a given location along the light beam output window;
Identical for all light curing units;
More homogeneous for broad band light curing units.
2. Which factor highly influencing the quality of a light cured resin composite is
controlled by the dentist only?
q a.
q b.
q c.
q d.
The composition of the resin based composite;
Resin composite residues stuck to the light curing units light output window;
The geometry of the fiber bundle rod or the lens;
The correct positioning of the LCU on top of the RBC.
3. The study used the following method to characterize the light curing unit:
q a.
q b.
q c.
q d.
BEAM PROFILE CHARACTERIZATION OF A DENTAL LIGHT CURING UNIT
USING A SPECTROMETER-BASED METHOD
An Ulbricht sphere;
Micro hardness;
A spectrometer and a camera based beam profile method;
Degree of conversion of the resin based composite.
4. Which was the main outcome of the study?
q a.
q b.
q c.
q d.
No inhomogeneity of the beam profile could be found;
Both methods showed very similar inhomogeneities of the beam profile;
The beam profile inhomogeneity was the same regardless of the measuring distance;
The irradiance was higher at the periphery of the beam profile.
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Stomatology Edu Journal
91