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Cigarette smoke affects bonding to dentin

 
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Sun Jul 25, 2010 11:45 am    Post subject: Cigarette smoke affects bonding to dentin Reply with quote

Gen Dent. 2010 Jul-Aug;58(4):326-30.

Cigarette smoke affects bonding to dentin.

Almeida e Silva JS, de Araujo EM Jr, Araujo E.


Abstract
This in vitro study evaluated the microtensile bond strength (muTBS) of composite resin bonded to dentin that had been contaminated by cigarette smoke. Ten extracted unerupted human third molars were used: Six molars were prepared for muTBS testing, while the other four molars were assigned to pre- and post-etching scanning electronic microscopy (SEM) analysis. The 20 specimens obtained from the 10 coronal portions were distributed into two experimental groups so that each tooth served as its own control. Group 1 underwent a daily toothbrushing simulation and exposure to a smoking simulation chamber, while Group 2 received only a daily simulated toothbrushing. Student's t-test demonstrated that Group 1 samples demonstrated significantly lower bond strength (49.58 MPa) than Group 2 samples (58.48 MPa). Pre and postetching SEM analysis revealed the presence of contaminants on the dentinal surfaces of the Group 1 specimens. It was concluded that contamination by cigarette smoke decreases the bond strength between dentin and composite resin.
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jasonl



Joined: 25 Aug 2005
Posts: 272
Location: Florida

PostPosted: Mon Jul 26, 2010 7:49 am    Post subject: Reply with quote

just in case one was letting patients take a smoke break mid-bonding....now you know you shouldn't.
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john kanca



Joined: 14 May 2005
Posts: 6346

PostPosted: Mon Jul 26, 2010 8:07 am    Post subject: Reply with quote

LOL

Cool
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