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<blockquote data-quote="AJEL" data-source="post: 91023" data-attributes="member: 1480"><p>The processing is one phase, press pack done properly is great, injection of a Heat PMMA, and the new ivocap seems to be injection of a self cure with heated flasks. Each system has been tested for a specific material keep to the FDA approved material per system. A good technician can do a good job. Accuracy, is important to the patient, and starts with a great impression. </p><p>I took part in a study in 1970, we didn't have all the impression materials we do now. We stayed with 2: ZOE & rubber base in custom trays from Lang. 10 Impressions were taken of each patient (10 patients in all 5 men 5 women),at different times at different hydration & in different temperature rooms. within the same impression material under different situations we found 10 impressions processed lucitone baseplates and 3 of 10 would interchange (but not perfect-ally).</p><p>My thought is we should do the best with the highest quality material, master it and a patient will come in that no matter how hard you try things might not work.</p><p>If Dave is trying to make non allergic dentures he may be incurring a Cliford charge on each patient, as the impression material, sterilization technique or denture materials can sensitize a patient. A Clifford institute report per patient will list everything down to the brand & lot of cotton swab that could possibly cause problem. Walter the chemist there told me Vinyl showed up with the smallest reactions, but people are people and even Vinyl will have someone sensitive eventually. Walter had even seen a few people sensitive to porclean teeth.</p><p></p><p>James I have done some nylon dentures probably for the same reason as you did, the fit is ok but then they broke off the teeth and that was difficult to repair. And reline is out of the question. Acetal dentures even with proper expansion stone never really fit quite right, altough I have a few all on 4 with acetal going right now, holding my breath on those.</p></blockquote><p></p>
[QUOTE="AJEL, post: 91023, member: 1480"] The processing is one phase, press pack done properly is great, injection of a Heat PMMA, and the new ivocap seems to be injection of a self cure with heated flasks. Each system has been tested for a specific material keep to the FDA approved material per system. A good technician can do a good job. Accuracy, is important to the patient, and starts with a great impression. I took part in a study in 1970, we didn't have all the impression materials we do now. We stayed with 2: ZOE & rubber base in custom trays from Lang. 10 Impressions were taken of each patient (10 patients in all 5 men 5 women),at different times at different hydration & in different temperature rooms. within the same impression material under different situations we found 10 impressions processed lucitone baseplates and 3 of 10 would interchange (but not perfect-ally). My thought is we should do the best with the highest quality material, master it and a patient will come in that no matter how hard you try things might not work. If Dave is trying to make non allergic dentures he may be incurring a Cliford charge on each patient, as the impression material, sterilization technique or denture materials can sensitize a patient. A Clifford institute report per patient will list everything down to the brand & lot of cotton swab that could possibly cause problem. Walter the chemist there told me Vinyl showed up with the smallest reactions, but people are people and even Vinyl will have someone sensitive eventually. Walter had even seen a few people sensitive to porclean teeth. James I have done some nylon dentures probably for the same reason as you did, the fit is ok but then they broke off the teeth and that was difficult to repair. And reline is out of the question. Acetal dentures even with proper expansion stone never really fit quite right, altough I have a few all on 4 with acetal going right now, holding my breath on those. [/QUOTE]
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