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    removing Ti base

    Discussion in 'Dental-CAM' started by sidesh0wb0b, Jan 6, 2017.

    1. sidesh0wb0b
      Sleepy

      sidesh0wb0b Well-Known Member Full Member

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      ok so that moment has come where a Dr wants a screw retained crown added to....and i cant for the life of me get the crown off of the Ti base.
      HELP!
      suggestions anyone?
       
    2. Patrick Coon
      Happy

      Patrick Coon Well-Known Member Full Member

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      Not official, but seems to work well:

      Base Temp: 400C / 752F
      Dry Time: 6 minutes
      Rate of Rise: 60C / 140F
      High Temp: 600C / 1112F
      Hold: 2 minutes
      Vacuum On: 400C / 752F
      Vacuum Off: 600C / 1112F

      This works well, but I can't guarantee the TiBase won't be oxidized. If it doesn't just come apart, put in the Ultrasonic for 2 minutes, that will loosen the "dust" from the cement allow it to slip apart.
       
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    3. erykd1

      erykd1 New Member Full Member

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      Just had this happen too. Here's what worked for me:
      Place restoration in a burnout oven 500 deg F for 1-2 hours, then let cool to room temp. Then ultrasonic with heat for 20 min. You may be able to get it apart by hand, but I found that I needed to screw the base down and use a little "muscle" (prying, tapping, throwing against wall) to get it apart.
      This was for Cubex2 to Ti base w/ ivoclar multilink. Good luck!


      Sent from my iPhone using Tapatalk
       
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    4. sidesh0wb0b
      Sleepy

      sidesh0wb0b Well-Known Member Full Member

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      thank you both for tips. will be trying this all weekend lol
       
    5. Tayebdental
      Inspired

      Tayebdental Tayeb S. CDT Full Member

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      I think throwing it against the wall what made the trick "we have separation":)
       
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    6. rkm rdt
      Artistic

      rkm rdt Well-Known Member Donator Full Member

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      Leave the muffle open slightly and heat it at idle. It should take about 10 mins to burn off the cement....not 2 hours.
       
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    7. FullPartial

      FullPartial Member Full Member

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      Agreed. We have the most success with putting it in our porcelain furnace ~400F for 10-15 mins. Minimal oxidation but it seems hard to avoid at temp. Good luck!
       
    8. French Cadman
      Happy

      French Cadman Active Member Full Member

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      I think you call it a soldering iron (?) , un fer à souder ou à décoller …. :confused:

      No Tibase oxyded, no contamination inside my furnace, no damaged screw and I control what I do , I use that and I can also repair my equipment ! Laugh

      I prefer the variable temp model for "Pro" …..

      [​IMG]
       
      Last edited: Jan 7, 2017
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    9. sidesh0wb0b
      Sleepy

      sidesh0wb0b Well-Known Member Full Member

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      tried that for an hour. nothing.
       
    10. erykd1

      erykd1 New Member Full Member

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      And they called my method overkill :)


      Sent from my iPhone using Tapatalk
       
    11. rkm rdt
      Artistic

      rkm rdt Well-Known Member Donator Full Member

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      Throw it in the ultrasonic .
       
    12. corona

      corona Active Member Full Member

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      sideshow.... its inevitable and useful.... .make a program on your porcelain furnace oven just for tibase removal . mine is set for 40 degress a minute up to 550 and hold for 10 minutes . slow cool down to 300 . oven temps will vary . some come right off ... some dont ...those that don't .... screw back into model or if you have extra model analogs then screw to that and gently pull / torque up . cheers .
       
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    13. Sevan P
      Nerdy

      Sevan P Well-Known Member Full Member

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      I just heatsoke it around 1200f for 20 min. Also made a special tool that houses a analog and screw the crown in and use some hemostats to pull them apart.

      Sent from my SM-G920V using Tapatalk
       
    14. Solaris01

      Solaris01 New Member

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      Just get an analog and screw it to the Ti base, hit the end of the anolg on the bottom while holding it with a plier. Aim it at a towel other wise your crown will fly away.


      Sent from my iPhone using Tapatalk
       
    15. Labwa
      Breezy

      Labwa Active Member Full Member

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      Yeah seriously stick it in at idle (if your idle is 400c) for 10 minutes. tap it out. Easy as pie.
       
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    16. Contraluz

      Contraluz Active Member Full Member

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      That is exactly my technique, too. You can even go as low as 350c.

      M
       
    17. lovebeautifulteeth

      lovebeautifulteeth New Member

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      [​IMG]


      Sent from my iPhone using Tapatalk
       
    18. sidesh0wb0b
      Sleepy

      sidesh0wb0b Well-Known Member Full Member

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      will do that now, thanks!
       
    19. sidesh0wb0b
      Sleepy

      sidesh0wb0b Well-Known Member Full Member

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      will give it all a whirl and report back shortly!
       
    20. user name
      Question

      user name Well-Known Member Donator Full Member

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      If you have a Ti with oxidation, blast with baking soda. It tends to cake, so I wouldn't fill a hopper, just run to a hobby store and grab a gravity feed air brush.
       
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