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<blockquote data-quote="denturist-student" data-source="post: 71171" data-attributes="member: 5492"><p>I have heard that Hydrocolloid based investments and pouring are big in British Columbia. While it may be a good and clean way to invest, I would do some research into it first. I have heard via my instructors about the turning orange...of course the quick fix for that is a rebase which is relatively easy under the reversible hydrocolloid investment. However the underlying disadvantage with that system is the lowered strength of the acrylic. We did our practice splints for implants out of the reversible hydrocoloid and pourable using ortho monomer and clear acrylic polymer. They turned out very nice with minimal work to finish them. I am now four weeks into my practicum and enjoy the opportunity to be in a clinic experience. It is a valuable gift to receive mentoring such as Ia m given right now. However were I to open up a lab from scratch I would definitely consider pourables because of the accuracy of the investing and quality of reproduction of the wax matrix....Also nice with that method is that the wax matrix which holds the teeth in place can be saved because it is not boiled away as it is in gypsum invested methods..a blessing if it doesn't work out. A lady in our class whose father runs a denture clinic in BC said that there were no problems such as shifted teeth or open bites so long as it is done in a timely manner.</p><p>But the biggest advantage is the double using of the hydrocolloid conditioner which can be used to duplicate models for partials in preparation for waxing up the framework. While I know that doing ones own frameworks seems counter-productive at times for clinicians, in my mindset anyway it takes the same amount of time for me to add the major and minor connectors onto a refractory model than to draw all the components on it for a prescription.....So why bother...just make the refractory cast and do the waxup....take care gentlemen...always something new to learn.</p></blockquote><p></p>
[QUOTE="denturist-student, post: 71171, member: 5492"] I have heard that Hydrocolloid based investments and pouring are big in British Columbia. While it may be a good and clean way to invest, I would do some research into it first. I have heard via my instructors about the turning orange...of course the quick fix for that is a rebase which is relatively easy under the reversible hydrocolloid investment. However the underlying disadvantage with that system is the lowered strength of the acrylic. We did our practice splints for implants out of the reversible hydrocoloid and pourable using ortho monomer and clear acrylic polymer. They turned out very nice with minimal work to finish them. I am now four weeks into my practicum and enjoy the opportunity to be in a clinic experience. It is a valuable gift to receive mentoring such as Ia m given right now. However were I to open up a lab from scratch I would definitely consider pourables because of the accuracy of the investing and quality of reproduction of the wax matrix....Also nice with that method is that the wax matrix which holds the teeth in place can be saved because it is not boiled away as it is in gypsum invested methods..a blessing if it doesn't work out. A lady in our class whose father runs a denture clinic in BC said that there were no problems such as shifted teeth or open bites so long as it is done in a timely manner. But the biggest advantage is the double using of the hydrocolloid conditioner which can be used to duplicate models for partials in preparation for waxing up the framework. While I know that doing ones own frameworks seems counter-productive at times for clinicians, in my mindset anyway it takes the same amount of time for me to add the major and minor connectors onto a refractory model than to draw all the components on it for a prescription.....So why bother...just make the refractory cast and do the waxup....take care gentlemen...always something new to learn. [/QUOTE]
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