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Silorane composites color stable

 
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Sun Oct 12, 2008 11:19 am    Post subject: Silorane composites color stable Reply with quote

J Dent. 2008 Sep 6. [Epub ahead of print] Links
Colour-stability and gloss-retention of silorane and dimethacrylate composites with accelerated aging.Furuse AY, Gordon K, Rodrigues FP, Silikas N, Watts DC.
Biomaterials Science Research Group, School of Dentistry, The University of Manchester, Manchester, United Kingdom; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.

OBJECTIVES: To evaluate the colour-stability and gloss-retention of silorane versus dimethacrylate composites exposed to accelerated aging from daylight radiation. METHODS: Five disc-shaped specimens of photo-cured resin-composites were prepared and manually polished for each material (Filtek Silorane, Herculite XRV, Tetric Evoceram and QuiXfil). Colour and gloss were evaluated before and after periods (baseline, 24, 72, 120 and 192h) of accelerated photo-aging in xenon light following ISO 7491:2000. Colour measurements were performed with a colourimeter according to the CIE-Lab colour-space. The colour change (DeltaE) for each time was calculated. The surface gloss was measured using a glossmeter. Results were evaluated using one-way ANOVA and Tukey tests (alpha=0.05). Correlations between logtime, DeltaE and gloss were evaluated using Pearson's correlation (alpha=0.05). RESULTS: Materials generally decreased in L* and a* and increased in b*. The strong exception was Filtek Silorane which maintained a* and b*. DeltaE was found to be a positive linear function of logtime for all materials. Materials varied in the magnitude and rate of increase of DeltaE with logtime: QuiXfil>Tetric EvoCeram>(Filtek Silorane>/=Herculite XRV). DeltaE remained<3.3 for Filtek Silorane and Herculite XRV. Gloss was found to be a negative linear function of logtime. Gloss was maximal in the sequence: Filtek Silorane approximately Tetric EvoCeram>Herculite XRV>QuiXfil. CONCLUSIONS: Silorane gave the best overall performance in stability over time, compared to a set of representative dimethacrylate composites.
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drhal35



Joined: 11 May 2005
Posts: 41
Location: Niskayuna, NY

PostPosted: Sat Feb 28, 2009 3:00 pm    Post subject: Reply with quote

John,
will we see a chemically compatible adhesive for this new class of composites?
Hal
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john kanca



Joined: 14 May 2005
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PostPosted: Sun Mar 01, 2009 5:43 pm    Post subject: Reply with quote

Do not be mislead. This was the report of a study, not an endorsement or recomendation. I think they are a solution to a problem that does not exist.

FYI, these materials will stick to Simplicity and Surpass.
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drhal35



Joined: 11 May 2005
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Location: Niskayuna, NY

PostPosted: Mon Apr 20, 2009 7:59 pm    Post subject: Reply with quote

sorry for the long delay...... new computer and all that............

so both ARE compatible?
are the super high bond strengths of Surpass still there with them?
And you don't think the strinkage problem is real, clinically relevant?
Hal
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Tue Apr 21, 2009 8:11 am    Post subject: Reply with quote

drhal35 wrote:
sorry for the long delay...... new computer and all that............

so both ARE compatible?
are the super high bond strengths of Surpass still there with them?
And you don't think the strinkage problem is real, clinically relevant?
Hal


I don't think it is of clinical significance in the boxes. I have not as yet seen or read of any significant advantages occlusally.
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