Phelan Dental Seminars

Dental Excellence Video 9: Class 2 Resin Recommendation.

Dr Stephen Phelan March 12, 2016

This is the ninth video from my Dental Excellence Video Series.

Have you ever placed a class 2 composite resin restoration and removed the matrix band to find flash on the buccal and lingual walls beyond the proximal box?

I have a simple solution that can eliminate much of this problem and I have created a new video for my Dental Excellence video series that will illustrate this solution.

Here is the link to the blog post I was referring to in Dental Excellence video 9.

The blog post in the link above contains a video I created that demonstrates using the sonic instruments and links to the product pages for the Kavo Sonic preparation instruments and tips.

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Post comments (31)
  1. Nevena on July 16, 2018

    Hello Stephen,
    Thank you for your video. I also use the Teflon tape for all the things you too recommend. I also use it for the isolation of the adjacent tooth when I do second class restoration on front teeth, instead of silicon matrix, for excellent contact point whit use of impression of the palatal side of the teeth I made before starting the preparation

  2. Michael LeFebvre, DDS on June 9, 2018


    They should provide all graduating dentists a lifetime supply of teflon tape, so many uses.

    Keep the videos coming!

  3. Carlos Oliveira on March 13, 2016

    Thank you so much for the tips!!! I have been using Teflon for some years covering implant screws and in isolation teeth but this idea you had is fantastic!!! Next monday IĀ“ll try in next case. Thanks also for the use of those sonic instruments.
    Have a good sunday!

  4. Husee on March 13, 2016

    Thank you for sharing
    class 2 needs much more time to shape the missing edge so this an awesome idea is easy going !

  5. Ron Loewy on March 13, 2016

    Thank you Dr Phelan for this addition to your long list of excellent clinical tips.
    Two other uses for plumbers teflon tape I’ve experienced as helpful:

    1) In fabricating a composite resin bridge directly in the mouth, the tape can be intimately adapted to the mucosa of the pontic area, then the pontic can be built up over this, tape removed prior to finishing leaving a smooth, closely adapted pontic surface opposite the soft tissue with no oxygen-inhibited material.
    Courtesy of Dr Buddy Mopper.

    2) Makes for great dental floss! Slides like a knife through butter, just don’t be too overzealous in tight spaces.
    Courtesy of my brother, who is not a dentist, just does crazy things every now and again.

    Best wishes, Ron.

  6. Antonio on March 12, 2016

    I often use the teflon tape in deep V classes instead of the classical retraction cord before placing the dam: it works!

  7. Scott Davis on March 12, 2016

    Hi Stephen

    Great tips. The thicker tape you bought will be too thick, try the pink tape that is in between the white and yellow for thickness. Great for isolating teeth when cementing veneers because it will ‘floss’ though more easily. I then stop it between the teeth, a little like polishing a shoe, to thin out the tape in the contact area.

    someone asked about mandibular blocks? Have you tried using the Wand? If is great for blocks and I get almost 100% success with it, much better feel. Also if you miss a lot you may be going in too low, move up 4 or 5 mm for your injection point and see if that helps.

  8. Dennis Wong on March 12, 2016

    What is the brand of textured rubber dam used in the video? Excellent tips. Thank you.

    There is a dental product called Iso Tape ( Pearson Dental supplies Item # T92-0530 ) selling for US$ 11.50 which is thicker than the more common plumbers tape found in hardware stores.

  9. Dr.Geevus on March 12, 2016

    Hi , I think Walser matrix ( is much easier and work much better than the ring systems.I wonder if you have ever tried it?

  10. Nathan Saydyk on March 12, 2016

    Thank you! I use plumbers tape for many of my restorations also. One area where I use it similar to your use is when you have a deep class II restoration that exposes some root depression and the wedge does not adapt the matrix to the depression. I will take a small strip of Teflon tape and push it inter proximal between the wedge and the root depression. I can adapt my matrix to any curves and seal the box and not have flash or an overhang.

    Great advice.

  11. bertrand dann on March 12, 2016

    Stephen, Thank you soooooooo much for this video. Preventing proximal excess has always been a huge frustration and your idea of using Teflon is BRILLIANT! I have been using Teflon for isolation during bonding and also to cover implant screws, but your matrix technique is very much appreciated. I am not aware of the Sonic instrumentation you showed. Would you be so kind as to send me info on it? Thank you, Bert Dann

    • Dr Stephen Phelan on March 13, 2016

      For the sonic tips, check out my blog post and video I reference in this video above. It has links to the various product websites right on the page and shows a demonstration video using the sonic tip that I filmed in my Zeiss Microscope.

    • Paul on March 15, 2016

      Great idea, but not only Phelan’s. Dentists in Italy have been using it for years. Just giving credit to those dentists who have do a lot with less.
      Great to share all practice tips.

  12. Steven Bleznak DMD on March 12, 2016

    Thank you four your informative videos. Do you offer any advise of administering mandibular blocks? I am inconsistent in my results, and I would appreciate any advice.
    Thank you.

    • Dr Stephen Phelan on March 13, 2016

      It could be you are injecting a little too low like Scott suggested in the comment above. Also, I have been using Articaine for almost 20 years and I rarely miss a block. I think the Articaine helps.

  13. Scott barr on March 12, 2016

    I haven’t used as substitute for cotton between endo appointments but wonder why not? If using medication on cotton pellet I would understand, but if just as a spacer, maybe use plumbers tape ?
    Anyway, liked your video and great ideas that seem so obvious now. Thanks

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