Forums Laser Treatment Tips and Techniques Hard Tissue Procedures Microdentistry Hybrid Technique

  • This topic is empty.
Viewing 11 posts - 1 through 11 (of 11 total)
  • Author
    Posts
  • #3537 Reply

    Glenn van As
    Spectator

    Hi folks……got a little time to post a simple occlusal.

    My discoveries with using the laser for Class 1 small fissure caries are as follows. It is not as fast or as accurate as small burs, and not as fast as AA.

    Having said that, I like using the laser for anesthetic to help with the burs.

    The difficulty lies in when you anticipate a small lesion either with diagodent or visual inspection and then find out the decay hits the DEJ and spreads laterally. IT is tough to enlarge the preps without a bur. THe enamel settings cause sensitivity in dentin.

    To combat this I generally use a wider 600 micron tip and create a little bit of a wider prep in the enamel and then use a 400 micron tip once the initial portion is done. If there is lateral spread at the DEJ viewed under the scope then we will widen it with a bur. The first part of the laser helps with anesthetic if the decay reaches the dentin but occasionally I will use a fissureotomy bur or small 1/8th or 1/16th bur to open the grooves (Brassler 003 or 004 burs).

    This case was a fissuresealant failure (god I hate sealants) and then it was a little brown groove testing 40 on the diagnodent.

    Opened it up and look at the decay at the DEJ, widened with burs and then caries detector gel. Note the false positives on enamel.

    I remove the last bit of decay with a small slowspeed round bur and use the laser at the end to remove the smear layer.

    Flowables used to fill it often dyract flow (GI) in the base.

    Graeme Milicich knows alot more about Fuji glass ionomers than me though.

    I just wanted to show you one of the difficulties with the laser in treating fissure caries in my hands and how I have developed this hybrid technique to still work on these types without anesthetic.

    This case was an upper 2nd molar treated without anesthetic and can be located here……….

    http://www.sendpix.com/albums/021115/0922360000003319575fd2345f07ad/

    Hope it is somewhat insightful to the difficulties of lasers in small Class I fissure caries. It works great to anesthetize and to remove the smear layer.

    Use the “toilet bowl prep” of widening the top part before you take out the crap in the center……my term.

    Glenn

    #12204 Reply

    2thlaser
    Spectator

    Glenn, Nice case. Couple of curiosity questions though. How hard/easy is it to work on those upper 2nd molars with a scope ( I don’t have one, thinking of course of getting one) compared to using loupes? What is your learning curve, for say, someone like me, a newbie with a scope, to learn how to use it properly? Lastly,
    How short of a tip is on your laser? I use a 4mm length tip, and find that I can angle my handpiece to reach most of that later spreading stuff, and when I can’t, I either widen the prep a bit with the laser (cause as you know I, it’s my own thing, try to not use rotary instruments), or succumb to using, like you, a 1/8 small round bur in my slow speed. Just trying to learn a bit. Thanks, how was Arizona?
    Mark

    #12205 Reply

    2thlaser
    Spectator

    Correction “lateral spreading stuff…”, typed too fast!;)

    #12208 Reply

    Glenn van As
    Spectator

    Mark…….you know what I admire most about you other than your pushing the envelope with crown preps. (did you get my private email thanking you for the article you sent me……I read it all and was impressed by the relative smoothness of the preps actually).

    The thing I admire is your professional nature in asking pointed and well thought out questions.

    Mark, until recently I had forgotten what the most difficult teeth to see with loupes are and it is the upper 2nd and 3rd molars. You block out the light with your head trying to see, you crane over at ridiculous angles to see and still cant manage to get a clear view particularly in decreased opening cases.

    With the scope the hardest teeth to see are the lower first molars and 2nd premolars. Its the angle you view with the scope.

    You need to use indirect mirrors alot with the scope ( even in the lower arch) but if you are used to using mirrors then it is easy easy to see the last teeth. I have very small mirrors I use at high mag to view things.

    I have cases which show me prepping MO and even DOs at times on third molars.

    I will post in a minute a case I did where I restored a lesion which was on the DB line angle of the maxillary left third molar which was subgingival. I did it with anesthetic at the patients request and I didnt shoot a photo until the prep was done.

    In closing Mark, there are many factors associated with the learning curve and they are as follows…..I know the answers in your case but for others.
    1. Do you use magnification now.
    2. How long have you used them.
    3. What magnifications do you use now.
    4. When you want to look at the linqual of the lower left molar, how do you view it? Do you move yourself or do you move the patient .
    5. Do you use mirrors routinely? ( for both arches or only the maxilla)
    6. Do you trim your own dies under a scope.
    7 Did you use a microscope lots in the past such as in an undergraduate microbiology program.

    If you practice standup dentistry , dont use mirrors, never have used magnification, dont ever move the patient or the mirrors and only move yourself to see, never have used a microscope then the learning curve is going to be steep and long.(PErhaps a year)

    If you are committed to change, have some of the features above then you may find your learning curve to be as short as a month.

    I was routinely using the microscope for most procedures at around 3 months and I had only used 2.5X mag routinely and only mirrors in the maxillary arch.

    The documentation is second to none.

    Finally with the scope you have to learn to move the handpiece out of the way to see. The scope will otherwise see the back of the handpiece so I like the Continuum laser handpiece which is like a pen. If you have a long tip on the laser then it is irrelevant ( I use alot of surgical length burs to move the handpiece out of the way of viewing.)

    I hope this gives you some insight into using a scope.

    You can always come to my office for free and watch, or combine it with a course that I am giving. I am doing one in December (7th ) at the University of British Columbia and one in March 5-8th ( not sure of the exact date) at the provincial dental meeting in Vancouver. These are both lectures with hands on workshops.

    Let me know if I can be of any help.

    Glenn

    #12211 Reply

    Glenn van As
    Spectator

    For mark…….here is the view on the DB of the third molar.

    No preop as only afterwards did I think of clicking a photo to show the ability to see.

    Glenn

    http://www.sendpix.com/albums/021115/17041400000197419c341922fb4178/

    #12209 Reply

    Glenn van As
    Spectator

    Here is another case showing the 2nd molar in the maxilla and prepping with a laser yet the mesial aspect of the third molar.

    If I can prep and photograph it , I must be able to see it huh!

    Glenn

    http://www.sendpix.com/albums/021115/170801000001990aec464902e33bb7/

    #12206 Reply

    2thlaser
    Spectator

    Glenn, these are great. I love the photos, and the service to the patient. I (when I get the &#36&#36, soon I hope) will be getting a scope, it’s the next thing on the list. I did a case today, just happened to show how I get the lateral decay in an occlusal. What I like to do, since I try real hard not to use rotary instrumentation, due to the obvious reasons, I try to open it up minimally first, then angle my shorter 4mm tip to get as much as possible at the dej and such, but then, I resort to a few instruments, especially a couple of microspoon excavators I am developing with American Eagle Dental Instruments out of Missoula, MT. Here are the pics I did on #29 today. http://photos.yahoo.com/toothlaser Check out the occlusal album. Let me know your thoughts, and what I may be able to do to improve my technique ok? I really value everyone’s opinion here, and definitely open to constructive criticism to get better. I did get your private email, and you are welcome. I just haven’t had time to respond privately. Have a great weekend, and yes, I WILL be taking you up on a visit to the Greater White North to see your operatory set ups, they look similar to mine already, although, I don’t have the scope yet!
    From the Lesser White North, 36 degrees and rain/snow,
    Mark

    #12210 Reply

    Glenn van As
    Spectator

    Mark………had a look, what a cool case.

    Microdentistry is wonderful when you have magnification.

    I think it is great that you did that case, without anesthetic I would imagine. Nice result, perhaps next time take a picture with a probe in there to show the depth.

    One thing I notice in alot of peoples cases done without mag is that caries is still present but from your pics it looks pretty good. I dont feel comfortable undermining all the enamel , its my GV Black days but I think that I am in the minority. I always feel uneasy making a keyhole type of prep (small in the enamel and larger in the dentin).

    You obviously used the sharp spoon with a good degree of success and in addition you were able to save alot of tooth structure.

    What camera did you use.

    If and when you get closer to buying a scope , just drop me a line and I can help you out with the education part and what to buy.

    Nice stuff…….I am off to view your veneer case now.

    Glenn

    #12207 Reply

    2thlaser
    Spectator

    Thanks Glenn. You are right, I will use a probe to measure next time. I see you do that all the time, great advise. I use the new Fuji Smilepix Pro S-2 12.1 million megapixels. Great camera, but still learning how to use it. I know the caries were gone, just a touch of “char” in the dentin on the mesial, which I removed when I went back in after the spoon technique and cleaned up. You know, talking about undermining enamel, I have done this alot, and with todays restoratives, the strength of the materials, the occlusal forces (which I check prior to doing this sort of thing), play a big role in whether or not I do this, BUT I have NEVER had a fracture, crack, or anything around the restoration so far. “Knock on wood”. Thanks for the advice, will get better and better hopefully!!!
    Thanks,
    Mark

    #12212 Reply

    Glenn van As
    Spectator

    How do you like the S2 and are you using Nikon sb 29 ring flash and 105mm lens?

    DO you have any full face shots?

    I am interested in colors.

    Glenn

    #12203 Reply

    gwmilicich
    Spectator

    Hi Glen. Just spotted this post after replying to the one on DT, so I thought I woudl cross pollinate my reply re the GIC’s to here as well.

    I agree with everything you say. I use what is appropriate to get the job done as I see best. I can use everything, AA, Laser, slowspeed, highspeed all on the once case. I don’t get all discombobulated if AA or the Laser won’t do it all. Equally, the slowspeed and the highspeed can’t do it all for me anymore because I have got two other tx modalities that have exposed the deficiencies of the slowspeed and highspeed. Something I didn’t understand until I got AA and the the Laser most recently. You can often see this lack of understanding in posts from people that haven’t got alternatives to the slowspeed and highspeed.

    As the oft used phrase goes, ya don’t know what ya don’t know.

    There is one thing I don’t agree with though :-))))
    Dyract is not a GI. It is a polyacid modified Resin.
    I have not got hung up an trying to make one Tx modality the be all and end all. I use what ever does the job best for the situation confronting me. Sometimes I will end up using AA, Laser slowspeed and highspeed all on the same tooth to get the job done most effectively and comfortably for the patient.

    Back to GIC.
    With all the Resin modified GIC’s, you have to mix two components together and they will set all on their own. Light will set them up as well, but that is only the resin component that sets to stabilize the material while the GIC reaction continues.

    If you have a material in a tube or syringe and you squirt it into the tooth without mixing anything with it, it is a resin. The polyacid modified resins will absorb water and slowly initiate a reaction, but it is not a true GIC. It will not create a GIC hybrid zone that is a combination of Ca Phosphate and F that is derived from both the GIC and the dentin. Marketing hype gets everyone confused, which is how they want you to be because we then buy something because of our confusion or misunderstanding.

    The same sort of confusion/disinformation occurs with all sorts of equipment and materials. Straight up honesty would be much better for the profession, but I suppose the quest for the mighty &#36&#36&#36&#36 rules.

    Cheers

Viewing 11 posts - 1 through 11 (of 11 total)
Reply To: Microdentistry Hybrid Technique
Your information: