Anterior MTA case
From: ahmad tehrani
Sent: Tuesday, February 21, 2006 10:43 PM
Subject: [roots] Anterior MTA case
just the garden variety recurrent decay around the crown's margin
with un-esthetic appearance of the crown #9.
PA radiolucency because of poorly sealed apex.
No pain or sinus tract present...... goes to show what the body is
capable of handling. cognitive dissonance at work.
Planned on orthograde retreatment of the case.
Removed the crown and the laterally condensed GP.
NaOCl, EDTA, Anolyte, Ethanol and COX used for irrigation with proper
sequence for effectiveness. CHX ( CHX = Chlorohexidine) dressing and
cemented the provisional crown for one month.
irrigated and cleaned the CH dressing....verified the apical diameter
to be a MAF= size 100. I placed an apical MTA plug & indirectly
sonicated it with Joey's pluggers in to place. Injected Ultracal *Ca(OH)2*
over the MTA mass closed with a moist cotton pellet/cavit and the
provisional crown so MTA set could be verified before closure.
3rd appt....MTA was rock hard...post & core composite buildup.... ahmad
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Nice case, Ahmad
I like the idea of putting Ca(OH)2 directly over the MTA ... and you
really got it nicely into place and well packed - Simon Bender
Thanks, Simon...somehow I knew you will like the 120th use for Ca(OH)2...)))
My rational for using it over MTA cases is:
CH high PH is bactericidal, making it a great holding medium....
it also hydrates the MTA to help in setting.
You can always use CHX gel too... I prefer the CH for its simplicity,
ease of use and is mixed with H2O. Plus, MTA releases CH during its setting
expansion, so I don't worry as much about the probable chemical
cross-reaction like I do with CHX + MTA. - ahmad
Ahmad, Lovely apical control on the MTA without a barrier. Did you use a
Lee block to make the plug, or just rely on the plugger plunger to
estimate the size of plug? - Bill
Hi Billy: I measured the canal it with the biggest Dovgan MTA carriers to
make sure it binds short of the apex..... Then I used the biggest plugger
( Orange) pre-measured to that point.
I put the apical plug wet and follow up with dry MTA packed with an amalgam
carrier....All of these are easily managed under a microscope.
After the apical plug is in place, I slightly wet the dry MTA bulk and
ult. sonicate it to place. - ahmad
Ahmad: Excellent apical control on the mta. Did you pack an apical barrier
to condense against? - gary
No Barrier. Just the usual obligatory 30 day CH. - ahmad
Excellent case and documentation Ahmad.
Any scientific reason to wait 1month with CH dressing?
Are there any studies in LIT to show that CH bacteriostatic potential would
last one month in the root canal ? -Venkat
No literature that I am aware of ( but I know very little literature )
indicates the antibacterial properties of CH last more than 7-10 days.
30 days would be a dream....But I defer to Fred or other lit. mavens to
answer that question.
CH acts as a holding medium ( As Dr. Schein refers to it)....I let it sit
for a month because:
1. I like to see some resolution of symptoms, if the tooth is symptomatic.
2. To cauterize the apical tissue enough to stop exudates and bleeding ( like a barrier )
3. Allow the immune system to get involved.
4. Give the patient and myself a break.
5. Scheduling conflicts.
so my reasons for 30 days is not exactly evidence based, but if I err,
I like to be on the side of caution. - ahmad
(Lee block) plastic block invented by Edward S Lee a San Francsico
Endodontist to use MTA.
The block works well...but it's tough to put in the pellets inside of teeth
and tamp them down I find.....so I'm using my carriers for all internal items
For root end resection preps that you have enough room in the crypt...
it does work quite well. - Joey D