Forums Erbium Lasers General Erbium Discussion Erbiums and Metal Matrices for Composites

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  • #2871 Reply

    Swpmn
    Spectator

    [img]https://www.laserdentistryforum.com/attachments/upload/williamsamatrix(2).JPG[/img][img]https://www.laserdentistryforum.com/attachments/upload/williamsamatrix(1).JPG[/img]

    In an earlier thread “Air abrasion vs. laser” the question was posed by Dr. Greg Holm regarding placement of a metal matrix against the adjacent tooth to prevent damage.  Dr. Glenn van As stated that he has done this many times and found no sparking or flashback from the matrix.  He proposed that it is not metal in itself but specific metals which cause flashback.

    As Bob Gregg suggested I took a chance today and irradiated a Danville sectional composite matrix with my Erbium.  There was absolutely no sparking or flashback.  Dr. van As’ observation was confirmed.

    I believe this is a significant finding and can help us determine why some metals appear to cause damage to our tips, mirrors and trunk fibers whereas other metals produce no flashback.  I have contacted Danville for the exact metal content of the matrices.

    Al

    (Edited by Swpmn at 7:38 pm on Feb. 25, 2003)

    #6720 Reply

    Anonymous
    Guest

    Al ,
    Thanks for doing the test. I had a feeling Bob wouldn’t send us on a mission to see how many would fry their laser tips. I guess I need to try one of my Garrison Gold matrices.

    #6721 Reply

    Glenn van As
    Spectator

    Hi Allen: I have been using a metal matrix for all my isolation either a cut tofflemire strip like this one I did today, or an interguard from Ultradent which I have shown before. It protects the adjacent tooth and seems to reflect the laser energy and give you faster cuts on the tooth.

    In this case I used a 400 micron tip with the Delight laser. A cut tofflemire was used in this case for isolation.
    I used a rubber dam with topical (one touch by Hagar) and didnt use any anesthetic except that.

    Settings were 30Hz and 100-120 Mj which was quite high for the enamel and then I lowered it to 70 mj for the decay. Used a tiny bur for the last little bit.

    Patient rated pain as 0 out of 100. In addition patient has alot of attrition. I used marks nice felt type instrument which is very thin and I like it alot for sculpting the composite.

    I finished the case with burs and polishing cups.

    Glenn

    Resize of Class 3 without anesthetic.jpg

    #6724 Reply

    Swpmn
    Spectator

    Thanks for the feedback Ron and Glenn. Thanks to Glenn now we now know it’s probably safe to use our Erbiums around metal composite matrices.

    That’s a cool case Glenn! I like the way you extended your prep onto the worn incisal edge. Ron’s forum and the way we learn from one another has been “Priceless” for myself!!!!

    Al

    #6722 Reply

    Robert Gregg
    Participant

    Allen,

    QUOTE
    As Bob Gregg suggested I took a chance today and irradiated a Danville sectional composite matrix with my Erbium.  There was absolutely no sparking or flashback.

    And you BELIEVED me?rock.gif???wow.gif wow.gif wow.gif

    Glad it worked out…….WHEW!!!

    Bob

    #6725 Reply

    Swpmn
    Spectator

    Bob:

    You better believe I “believed” you because you have a reputation as a dentist with a vast knowledge of laser applications in dentistry and if this test didnt work out I was gonna be calling you for reimbursement on a trunk fiber!!!!!!!

    Al

    P.S. Nice article in Dentistry Today and cool beard, ha ha ha!!!!!

    #6723 Reply

    Robert Gregg
    Participant

    Okey Dokey Alan, I’ll keep that in mind!

    Thanks for the compliment. Glad you like the beard. My wife doesn’t want me to shave it.

    Are you going to head up to Destin next week for the ALD?

    Bob

    #6726 Reply

    Swpmn
    Spectator

    Bob:

    Unfortunately the Destin ALD meeting conflicted with our local affiliate Winter meeting in Tampa. I need to meet with John Kanca on Friday the 7th and get an update on bonding.

    I’m probably going to join the ALD and work towards my Standard Proficiency because I may have gotten the “cart before the horse” by jumping into the clinical applications of lasers first.

    Al

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