I hate distal caries on 2nd molars caused by impacted 3rd molars: difficult access, close to pulp, post-op sensitivity, periodontal problems, etc. Just few problems that I know it will be hard to deal with.
I followed Pascal Magne's advice on this one, and it turned out really nice and easy. Check out the sequence:
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| pre-op taken 11/2011 |
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| decay exposed after #32 extracted |
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| matrix band placed, caries detector used |
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| pulp capping and primer |
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| immediately after band removal, prior to finishing or polishing |
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| pot-op x-ray, no finishing or polishing on distal |
The martrix band can be purchased at www.greatercurve.com
Cut a second piece and slide into the first band to even go deeper and to protect gingiva during caries removal. Discard it prior to placing composite. Voila!
If an indirect restoration (onlay) is needed on 2nd molar with distal decay, this technique can be used for margin elevation. check out the next case:
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| #18 MO composite DO amalgam with open margin on distal |
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| amalgam removed, found base |
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| base removed, found decay |
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| different angle to show the DL wall |
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| MO composite removed |
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| still removing more decay |
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| I was really dreading seeing pulp, did not want to end up in RCT |
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| fortuanately, no pulpal exposure! I placed a composite to elevate the margin, IDS done |
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| CAD/CAM onlay cemented with composite as cement |
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| immediately after cementation |
In this case I did not use greater curve matrix, did not know about this technique. It was hard to place rubber dam and have a good seal on distal, I thought removing it and replacing for tofflemire band will be even worse for fluid control. I cemented the onlay with resin cement, the little "puff" on distal is the cement, indicating where the junction between composite for margin elevation and the onlay. I removed it later with finishing strips. I wish I had used the greater curve bands for margin elevation and cementation, it would have made my day so much easier.
Next case the decay was smaller, 3rd molar was extracted, crown
lengthening done, and I used distal access instead of occlusal access.
it was deeper than it looked.
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| pre-op bite-wing |
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| after extraction of #32 |
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| clinical view after crown lengthening, I thought it will be small... |
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| Wrong, it was almost to pulp | 1 | 1 |
Fortunately, the tooth is till "alive" and asymptomatic today, I am glad we did not need RCT.
