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Monoks
Joined: 26 Jan 2010
Posts: 10
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 Posted: Mon Apr 07, 2014 11:33 am Post subject: Surpass pH |
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What is the pH of Surpass? From my understanding, a bonding agent with a lower pH can inhibit the bond of a self cured material. Am I right in this understanding?
I've heard that self etching materials are typically lower in pH. And from my understanding John classifies Surpass as self etch (even though it seems like it should be considered a total etch) |
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macadoo
Joined: 31 Jan 2014
Posts: 36
Location: Washington, NC
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| Posted: Mon Apr 07, 2014 12:39 pm Post subject: |
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There are some bond strength issues with self-cure/dual-cure resins, but, according to JK, it's not a concern with Surpass.
As for the pH issue, at the time the self-cure resin is applied, the bonding agent is polymerized and is no longer a solution. Can a solid polymer have a pH? Is it the pH of the oxygen-inhibited layer that matters? |
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john kanca
Joined: 14 May 2005
Posts: 6346
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| Posted: Wed Apr 09, 2014 9:34 am Post subject: Re: Surpass pH |
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| Monoks wrote: | What is the pH of Surpass? From my understanding, a bonding agent with a lower pH can inhibit the bond of a self cured material. Am I right in this understanding?
I've heard that self etching materials are typically lower in pH. And from my understanding John classifies Surpass as self etch (even though it seems like it should be considered a total etch) |
Surpass 1 has a pH of 0.6. Surpass 3 is neutral. Surpass 2 neutralizes Surpass 1.
Surpass works just great with self-cure
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