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    Discussion in 'Removable' started by Denture Dude, Jul 8, 2017.

    1. JohnWilson

      JohnWilson Moderator Staff Member Full Member

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      There are so many variables when I see stone do weird things. Everyone of the answers are totally plausible. I do very little compression packing anymore but when I did I always used plaster in a slurry mix that I would paint on with my finger tip around all of the gingival contours. Rubbing it in and eliminating any chance of a bubble intense areas. The separator also penetrates this material MUCH better than the dense stone in my opinion. I have seen techs use all kind of stupid stuff like debubleizer and seen them slop on the sodium silicate or supersep from the bottom investment and not rinse off the wax. All of these things leave a residue and retards the setting of the stone.

      Today with IVOCAP and IVOBASE we do things differently with a flow stone and putty but on occasion I still do it old school just to make me feel better about the 40 Brass flasks I have sitting and laughing at me.
       
      • Agree Agree x 1
    2. Affinity
      Question

      Affinity Well-Known Member Full Member

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      I would say it looks like air also. The stone around the tooth vestibule looks like it dried before it stuck to the rest of the pour?
       
    3. JMN
      Curious

      JMN Christian Member Donator Full Member

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      I'd go with air also after another look. It appears possible your finger application and pour application may not have merged in the gap areas.
      The CEJ area looks like my stone when I get a water pocket and the stone gets too diluted.
       
    4. denturist-student

      denturist-student Active Member Full Member

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      I have been using rapidflask for investing both on ivobase and packing and never seen anything like this.
       
    5. JKraver
      Tired

      JKraver Well-Known Member Full Member

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      My guess is put in boil out before stone was set or Separated too soon. I paint a thin layer of silky rock around my teeth. Flicks right off and doesn't absorb wax as readily as plaster/stone.
       
    6. Denture Dude

      Denture Dude Member Full Member

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      Final product actually didn't turn out totally horrible, definitely not my best work. JKraver, is silky rock from whip mix? Sounds like a good solution. Busy as I've been I cant remember for sure if stone was entirely set, pretty sure though. Air good possibility, (pos vibrator, new one coming) or all of the above.
       
    7. JKraver
      Tired

      JKraver Well-Known Member Full Member

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      Any non resin containing die stone will work I vac mix and then spatulate around teeth pushing it into interproximals to not have any bubbles. Wipe off cusps. Allow to matte/lose sheen but still not set then pour top cap.
       
    8. nickate

      nickate Member Full Member

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      The air bubble inside the middle pour of the flask retards the stone from setting at the same rate as the stone around it Chemists-- please explain why as I blame it on magic (kinda breaks down the stone and flakes it like you see).

      The OP has given me an "AH HA" moment as I had complained about slight flash of stone around my gingivals after processing but only sometimes and not on all teeth... went after all the original suspects and this post ( though I have been seeing what he saw for years) made it click for me. JMN knows of my foibles....
       
    9. JMN
      Curious

      JMN Christian Member Donator Full Member

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      Y'mean this?
      http://dentallabnetwork.com/forums/...rylic-flash-around-teeth-after-process.25735/
       
    10. nickate

      nickate Member Full Member

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    11. JKraver
      Tired

      JKraver Well-Known Member Full Member

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      Run a hot Pkt1 or dulled tip of bard parker along the cej to final seal after final carve. Do you measure your stone/water? I just give a few hard taps on bench top and it invests pretty well.
       
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