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    Digital Partial Dentures Production

    Discussion in 'CAP-Zahn' started by BobCDT, Nov 8, 2017.

    1. eyeloveteeth
      Innocent

      eyeloveteeth Well-Known Member Donator Full Member

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      we've been doing duracytel the conventional way for years. It's a great alternative -
       
    2. rkm rdt
      Artistic

      rkm rdt Well-Known Member Donator Full Member

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      So you have a track record to evaluate.
      Can you share your experience with adding to or modifying cases that require further teeth?

      "Alternative" means to me that you still make metal frames.
      What is the reason for that?
       
    3. eyeloveteeth
      Innocent

      eyeloveteeth Well-Known Member Donator Full Member

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      i don't believe that all frames should be made out of HIPS - there are some cases especially when it comes to Class 4 bracing that i believe metal is key.

      Also, it's not exactly a 1:1 - the Duracytl and other HIPS do require it to be slightly thicker compared to what i could get away with on a Wironium design.


      Repairing the clasps and are easy with the hot shot gun - adding teeth to it is a nightmare and we recharge a 50% fee for that
       
    4. BobCDT

      BobCDT Well-Known Member Full Member

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      I don't believe I ever suggest Acetal to be better. I do see it as an alternative that has many advantages, patient comfort, tooth color, ease of manufacturing, cost, etc.. There are pros and cons to each partial material we now use. There is no perfect material, for this indication, that I'm aware of. I am looking into your skepticism and will report back once I understand it better.
       
    5. JMN
      Curious

      JMN Christian Member Full Member

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      I agree it has greatly improved aesthetic opportunities. Many patients don't like to see metal, and a classic cast frame RPD is a psycological punch that they are tuning into their grandparents, where this is a futuristic material option.

       
    6. BobCDT

      BobCDT Well-Known Member Full Member

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      I think there are two aspects to the question posed:

      1. How durable is the repair?

      2. Is it worth taking the time to do it?

      Regarding the first aspect, 10 years experience is that when done correctly, the repair of this thermoplastic materials (whether it is Acetal or DuraFlex/VisiClear) is permanent and the appliance is as good as new. These materials will re-melt onto themselves without the need of a primer or bonding agent (that, however, is not true of nylon-based materials like Valplast or TCS). For example, here is a 3 minute video showing the process of adding a clasp:


      https://youtu.be/7xR46ebsiYQ


      Concerning the second aspect, if a clasp or tooth needs to be added, then there is no point in re-making the entire appliance. If there is a catastrophic failure, then yes, it is better to start anew.
       
    7. Affinity
      Question

      Affinity Well-Known Member Full Member

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      Duracetal is cool, strong stuff, they use it in Harleys for the chain guide.
       
    8. BobCDT

      BobCDT Well-Known Member Full Member

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      I just got word last night we have worked out a CAM strategy to mill an Acetal partial in under 2 hours in a Roland mill. We will explore continued optimization.
       
    9. rkm rdt
      Artistic

      rkm rdt Well-Known Member Donator Full Member

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      Is it better to pack or pour an acetal case ?
       
    10. XxJamesAxX
      Lurking

      XxJamesAxX Active Member Full Member

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      Your preference. Treat it just the same as you would a cast partial you was processing. Inject, pour, or pack at your preference and what acrylic your using. I have done both, currently doing more pours with the new Dentsply HIPA.


      Sent from my iPhone using Tapatalk
       
    11. rkm rdt
      Artistic

      rkm rdt Well-Known Member Donator Full Member

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      I pour because I'm an impatient devester.

      Any suggestions to replace hydrocolloid?
       
    12. XxJamesAxX
      Lurking

      XxJamesAxX Active Member Full Member

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      I do like how clean everything comes out when using the pour technique.

      Not sure I follow you about replacing hydrocolloid. You want to use a different material in your pour flask?
      If so may I ask why?


      Sent from my iPhone using Tapatalk
       
    13. JMN
      Curious

      JMN Christian Member Full Member

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      I must be really really missing something, you are pouring and packing acetyl?
       
    14. XxJamesAxX
      Lurking

      XxJamesAxX Active Member Full Member

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      No the technique of processing teeth onto the acetal framework. Or at least that’s what I was talking about and assumed the same about RKM.


      Sent from my iPhone using Tapatalk
       
      • Agree Agree x 1
    15. JMN
      Curious

      JMN Christian Member Full Member

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      Thanks for uncrossing my wires.
       
    16. rkm rdt
      Artistic

      rkm rdt Well-Known Member Donator Full Member

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      I don't do ortho.....yet.
       
      • Funny Funny x 1
    17. CoolHandLuke
      Fiendish

      CoolHandLuke Well-Known Member Full Member

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      Way ahead of you

       
    18. JMN
      Curious

      JMN Christian Member Full Member

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      That's just fine, until one day....

      it starts making barbed wire faster than you can see and responds to the emergency stop button with waving it's super heated clasps around and a badly rendered "What...are... you... communicating... about... , ...Willis"
       
      Last edited: Nov 11, 2017
      • Funny Funny x 1

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