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31 I read with interest your article on restoring notched lesions in the July 2008, Parkell Today. I used exactly the same technique as yours (Brush&Bond and Epic-TMPT). What I didn't see mentioned in your article was the use of any type of matrix. I used a clear matrix hoping to get a more "dense" or "compact" restoration. Do you think it is necessary to use a matrix or not?I enjoy reading your articles and am also a great believer in Parkell products. Thank you for any info you may provide on the use of a matrix or not.

Thanks for your kind remarks on my articles. Much appreciated. To answer your question, while I haven't found it necessary to use a matrix, I can understand the potential benefits of using one. Because EPIC flows so nicely, I'm usually not concerned about…

32 I recently purchased a C&B-MetaBond® kit to do a porcelain repair on a four-unit bridge. Since the bridge was not made by me, I am not sure what type of metal the framework is made of. In cases of unknown metal, am I better off using the MTL-V primer or should I just go straight for the MetaBond?

Use the MTL-V primer to increase the bond to restorations that contain noble metals (gold, platinum and palladium) or precious metal (silver). The nobler the metal is, the more important it is to use the MTL-V primer to bond the restoration. Simply put, for…

33 I recently started using your new SEcure cement and have been very happy with the results so far. Your advertisements say it can be used either with the specially designed Self-Etching Primer or with Brush&Bond. I want to use it with whichever one will work best. So which one works best, Brush&Bond or the Self-Etching Primer?

Because they are both 4-META based, Brush&Bond and the Self-Etching Primer are both equally effective in their ability to: * Desensitize and seal the prep. * Increase early bond strength between the tooth and the SEcure resin cement. * Create excellent…

34 I understand that the new SEcure® cementation system is self-etching and can be used by applying the bonding agent without a chemical-activator brush since the activator is incorporated in the liquid. If, however, I’m already using Brush&Bond®, the primer is not necessary. It would seem then that the SEcure primer would be the same as – or similar to – Brush&Bond, but without the special brushes. Brush&Bond liquid is about the same price as SEcure primer. Other than increasing the cost to almost double, what is the difference between using SEcure primer as a bonding agent with regular applicators and Brush&Bond for, say, composite restorations, etc.?

SEcure primer requires contact with SEcure cement to activate. It won't activate without it. Hence, using it in place of Brush&Bond isn't a good idea. But it shows you're thinking . . .

35 I was not able to find the article describing the frenectomy with the electrosurge. How do I get to that article?

Try this: http://www.parkell.com/cgi-bin/secure/commerce.cgi?cart_id=1243006681.336&product=Articles&pid=00043

36 I'm looking for a resin composite bonding agent to bond resin composites to dentin and enamel. I use a cordless LED curing light. Given that your product Touch&Bond doesn't cure with LED lights, what other bonding agents do you have that’s compatible with LEDs?

The successor to Touch&Bond is Parkell's very successful Brush&Bond self-etching bonding agent. It requires only one coat, works with any bonding light, creates a very thin film, works with self-cure, light-cure and dual-cure composites, and is wickedly…

37 Is DuraFinish All-Cure supposed to be yellow?

Yes, the photo initiators used in DuraFinish All-Cure give it a yellow tint, which virtually disappears after brush-out and light curing.

38 Is Pain-Free compatible to be used on crown preps before cementing? If yes, which cement categories are compatible and which are not. Thank you!

No. Pain-Free is incompatible with subsequent resin bonding due to its non-reactive final surface. If you're looking for ultimate desensitization before crown cementation, consult the document I wrote on using Parkell's Brush&Bond to accomplish desensitization,…

39 Is there any difference in the polymerization shrinkage of HyperFIL-DC when it is allowed to self-cure as opposed to when it is light-cured?

Yes. The volumetric shrinkage of HyperFIL-DC when it is light-cured is 2.6%. When it is allowed to self-cure, the volumetric shrinkage is 1.63%.

40 My HyperFIL-DC sometimes seems to quick (snap) set. Why?

Several factors can contribute to accelerated setting of any composite, including HyperFIL-DC. If you use peroxide as a cleaning/disinfecting agent, and fail to completely rinse it off prior to placement of a resin material, the residual peroxide will result…

41 One of the areas that I have trouble with is figuring out is how to get from point A to point B and ultimately, completion when starting complex cases. I find myself forgetting things and having to rethink the process every time I have to schedule the patient’s next visit. How do you handle this?

I love your question because I’ve witnessed my associate fall prey to the same issue. In fact, I’ve spoken with many a doc that subscribe to “seat of the pants” treatment sequencing. Mind you I’m not talking about treatment planning but rather,…

42 Should MTL-V Primer be light-cured?

No. The Primer should not be light-cured.

43 Thank you for an informative article on restoring a bruxism patient with veneer. I want to restore them but I don't know how to get them into proper occlusion. My occlusion knowledge is limited to what they taught in dental school from 1992-1996.

In the end you’ll discover that in most cases, simply providing for a canine-protected occlusion in lateral excursions, stable centric contact, and two tooth contacts in protrusive (that is two centrals touching in a protrusive excursion) will be all you…

44 Thanks for all your contributions to the profession and your down-to-earth, easy going style. I appreciate (and admire) it. Have a question for you that I'm almost embarrassed to ask, but I haven't found a solution so I thought I'd give it a try. Maybe you've found an answer. I'm fond of using custom trays for larger cases, usually with Cinch™ PVS impression material. After 24 years of practice, few things can get me rattled. Like you, I guess, I've seen just about everything (or maybe not!) But these materials are so accurate and tend to be quite stiff, especially in a custom tray, and can make it extremely difficult to remove from the mouth. Recognize that? I push and pull, pull and push. I'm sure my patient is uncomfortable, as I begin to wonder how I'm going to get this tray out of the mouth. Eventually it gives (thank Heavens!) but I wonder why I have to put my patient and myself through this experience. Besides doing the obvious – blocking out undercuts, pontics, etc. with wax or block-out material – have you found a way to make these impressions easier for all involved? You're a smart guy, I'm sure you have an answer. I would be VERY grateful if you did. Thanks so much for your time. Keep writing.

Nice letter. I have certainly felt your pain. I, too, prefer rigid custom trays for my more intricate restoration cases. They certainly increase the chance of obtaining an excellent impression. The flip side, however, as you describe is the propensity for…

45 To minimize shrinkage and the resulting stress on the bond, is layering of HyperFIL-DC necessary for large, high c-factor (configuration factor) restorations?

No. Due to its dual-cure capability, HyperFil-DC can be bulk-placed without concern for increased stress due to shrinkage in large restorations.