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Medical Forum / General / Dentistry / February 2006composite + amalgam
My dentist wants to fill in some side wall deterioration underneath an existing amalgam filled tooth. He said something about joining the composite resin to the amalgam or butting it up. Is that possible? Having amalgam and direct composite resin materials touch each other? What about expansion ratios and cracking? Any chemical effects known? Is it normal practise? tnx > My dentist wants to fill in some side wall deterioration > underneath an existing amalgam filled tooth. He said something > about joining the composite resin to the amalgam or butting it > up. Is that possible? Having amalgam and direct composite resin > materials touch each other? What about expansion ratios and > cracking? Any chemical effects known? Is it normal practise? The bigger problem with amalgam and resin touching each other is adherence (they don't adhere to each other very well). That would be the main reason why they shouldn't be used in that way, as far as I understand (but I'm not a dental professional). It's not considered good practice. Having said that, I've seen stuff like that hold up over long periods of time. Expansion/contraction... hmm... depending on whom you ask, dentists will have different opinions on that one. peepee thats a very good conservative dentistry technique called rebonding and has nothing wrong with it Having read through the original post again, I think I pictured it incorrectly (my fault). Normally amalgams and composite doesnt join by chemical way bvut on the market there are special bonding systems to increase ahesion. Anyway amalgams and composite seems to be worse "sandwicth methods" than composite/glasionomers from other hand Its cheaper. Amalgam has mechanical retention mostly. 2 methods are accetable , free choice !! regards Krzysztof Polanowski > My dentist wants to fill in some side wall deterioration > underneath an existing amalgam filled tooth. He said something [quoted text clipped - 4 lines] > > tnx peepee schreef: > My dentist wants to fill in some side wall deterioration > underneath an existing amalgam filled tooth. He said something [quoted text clipped - 4 lines] > > tnx Well, it's better than drilling the entire filling out with a lot of collateral damage. I usually use Fuji IX or another GIC. > peepee schreef: > > My dentist wants to fill in some side wall deterioration [quoted text clipped - 8 lines] > Well, it's better than drilling the entire filling out with a lot of > collateral damage. I usually use Fuji IX or another GIC. In my opinion amalgam and composite never have adhesion. I dont know any adhesion system to do that. The Sandwich Tecnique is not a good tecnique and older. In my opinion the best thing to do is to remove all the amalgam, if necessery do indirect pulp caping and than do a new restorative filling. You can do also do a onlay or inlay in that tooth. In other way you can make a endodontic treatment then make a crown. With Best Regards from Portugal Sorry for my Bad English I Agree take it all out and put an entire new restoration, whatever material you choose Cheers! Gabe >> peepee schreef: >> > My dentist wants to fill in some side wall deterioration [quoted text clipped - 20 lines] > With Best Regards from Portugal > Sorry for my Bad English |
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