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Video Details
2級 ダイレクトレジン: マトリックスシステムの新しい選択肢-Part3

Description:
In Part 3 of this series, Dr. Glenn van As continues the discussion of some of the new choices available in Separating Rings, especially as they relate to enhancing successful contact development in class II direct resin restorations. In addition, he details the step-by-step techniques involving Rubber dam placement, hemostasis, and wedge placement. Emphasis is placed on what is required to optimize the utilization of the new generation of separating rings including the choice of composites for these type of restorations.

Date Added:
2/25/2009

Author(s):

Glenn A. van As, BSc, DMD Glenn A. van As, BSc, DMD
Dr. Glenn van As graduated from the University of British Columbia (D.M.D.) in 1987. He is in full time private general practice and acted as a part time assistant cli...
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Online Videos / Restorative / Composite Resin / Class II Direct Resins: New Choices in Matrix Systems - Part 3




Questions & Comments
KM - (1/17/2018 10:06 PM)

I should think that the main problem with the glory hole is when bonding gets through the hole, coating the adjacent tooth, and full composite then gets packed over it. If this happens (especially if a slightly wider than ideal glory hole has been made), you may have a big problem getting the matrix off---you'll have to cut it off... Then you won't have any separation between the teeth at all (since they'll be bonded together)! When this happens, an Interproximal Saw will be your saving grace, but it may take a bit of "sawing" to get through the glory-hole-bonded-contact. good luck!

terry abel - (7/26/2014 9:07 PM)

Great overview Glen. Much appreciated.

Island Mak - (7/26/2012 12:27 PM)

It is interesting to learn that there is a glory hole at the matrix during preparation in order to make the class II restoration contacting tightly with the adjacent teeth. However, I am not sure whether the dental floss can pass through the interproximal area or not. It doesn't show at the lecture that the floss can pass through the interproximal area. or not.

Alaa Qari - (10/25/2010 3:09 PM)

very useful lecture thanks.. I like it so much..

Glenn van As - (3/14/2010 1:19 PM)

[quote=gordon west]Glenn,
Nice overview of the sectional ring systems, I too like the V3. Which bonding system and composite are you using? Do you have any research to back the use of laser on the dentin? Thanks again and nice job.
[/quote]

Hi Gordon, thanks for the compliment. Yes there is a study that looked at bacterial disinfection of 20 preps using ErYAG and bacterial growth vs 20 preps not using the laser.

In all but one of the 20 preps using the laser - no bacterial growth were observed.

Here is a study that showed dentin bacterial reduction up to 500 microns. Lasers will disinfect well, that has been shown in both perio and endo research. The aim is not to improve bonding but more to disinfect and open up the dentin for bonding.

Glenn

Lasers Med Sci. 2009 Jan;24(1):75-80. Epub 2007 Nov 20.
Decontamination of deep dentin by means of erbium, chromium:yttrium-scandium-gallium-garnet laser irradiation.
Franzen R, Esteves-Oliveira M, Meister J, Wallerang A, Vanweersch L, Lampert F, Gutknecht N.

Department for Conservative Dentistry, Periodontology and Preventive Dentistry (ZPP), RWTH Aachen University, Aachen, Germany. rfranzen@ukaachen.de
The aim of this in vitro study was to evaluate the depth of effectiveness of erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser irradiation on microorganism reduction. From human roots, dentin slices of 100 microm to 1,000 microm thickness were prepared. These specimens were sterilized and then inoculated with 1 microl of Enterococcus faecalis suspension. The backs of the specimens were then irradiated with Er,Cr:YSGG radiation at a pulse energy of 3.13 mJ, delivered at an incidence angle of 5 degrees to the dentin slice surface. A control group was left without irradiation. The remaining bacteria were collected in 1 ml sterilized NaCl solution, serially diluted and seeded in Columbia-Agar plates. Despite the low pulse energy of 3.13 mJ, the Er,Cr:YSGG laser irradiation resulted in significant bacterial reduction up to a dentin thickness of 500 microm (P < 0.05). Scanning electron microscopy (SEM) micrographs of the contaminated and irradiated surfaces showed the absence of a smear layer and opened dentinal tubules.

gordon west - (2/28/2010 9:29 AM)

Glenn, Nice overview of the sectional ring systems, I too like the V3. Which bonding system and composite are you using? Do you have any research to back the use of laser on the dentin? Thanks again and nice job.

Carlos A. Ramirez Schleske - (1/2/2010 9:51 AM)

Excelent for everyday practice. Great tips . Five stars

Steven Chou - (11/29/2009 10:39 AM)

Very practical videos for daily restorative dentistry. Five stars

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