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Medical Forum / General / Dentistry / July 2006plastic based crown
I'm a an nhs patient in the uk. I went to a new dentist for a crown at fixed priced. While doing the initial work he said that I would be better off with plastic crown instead of using a precious metal. Then I suddenly becam a private patient. The price has now gone up by quite a lot This guy sounds very dodgy to me, but I'd like other opinions before shout my mouth off He said I need a plastic base crown (still ceramic tooth) because if need a root filling later then it would be much easier to get at/dril through. He said he had to go very near to the nerve when drilling th tooth down to a core. He said if I have a metal crown then I might los the tooth if he has to drill through the metal, it all sounds ver suspect to me. but I'd like opinions I haven't had the crown fitted yet. so it's not too late -- sks >I haven't had the crown fitted yet. so it's not too late. Sounds dodgy to me too, get another opinion. >>I haven't had the crown fitted yet. so it's not too late. > > Sounds dodgy to me too, get another opinion. Me three. Steve  SignatureMark & Steven Bornfeld DDS http://www.dentaltwins.com Brooklyn, NY 718-258-5001 ok, thanks. so, has anybody else even heard of a plastic based crown? is there such a thing in usual every day dentistry? Signaturesksk > ok, thanks. > > so, has anybody else even heard of a plastic based crown? > > is there such a thing in usual every day dentistry? Polycarbonate or acrylic crowns are frequently used as temporary crowns. Lab processed acrylic crowns are sometimes used as intermediate-term restorations. Long term use is dicey, because most of them are too soft and they wear. There are however some reinforced processed resin crowns which are in fact used as permanent crowns--these could be broadly called "plastic". I occasionally use them when I have a patient with worn teeth, as they won't further abrade teeth they chew against. Steve SignatureMark & Steven Bornfeld DDS http://www.dentaltwins.com Brooklyn, NY 718-258-5001 > I'm a an nhs patient in the uk. I went to a new dentist for a crown at a > fixed priced. [quoted text clipped - 13 lines] > > I haven't had the crown fitted yet. so it's not too late. I bet my fifth extremity that he actually means an all-ceramic crown. This practice is known as "bait and switch" and I'm sure my american colleagues will explain this to you better than I can. Unfortunately, this is what an NHS dentist has to resort to to make ends meet at the end of the day. About not being too late cause it's not fitted yet. If you have signed a NHS treatment plan (comes in a big blue or pink form of which you retain a copy) then you will be liable for the cost of the crown even if it's not fitted, as you've already put the signature in the box saying "I agree to pay the aforementioned charges..." or something to that effect. If you haven't signed one, you might wriggle your way out of it. Best of luck, George Correction: You will be liable for the charge if the tooth has been prepared and an impression sent to the lab. If the tooth hasn't been worked on yet, it would be wise to clear things with your dentist before proceeding. Don't be afraid to stand up for yourself. Your tooth, your choice. George now he says that the crown is going to be completely made of plastic the private plastic crown has netting (what's that?) in it t strenghten it, the nhs plastic crown doesn't have netting he says the metal based crown is more likely to break off and more o the real tooth has to be cut away. The plastic crown bonds to the toot much better I've got a bad feeling that I'm going to end up with a plastic crow because he makes much more profit out of them than the metal centr ones covered in porcelain He says the plastic ones lasts much longer.:rolleyes: yes, I have already paid the deposit. Thanks for all the info provided so far -- sks > now he says that the crown is going to be completely made of plastic, > the private plastic crown has netting (what's that?) in it to [quoted text clipped - 12 lines] > > Thanks for all the info provided so far. Some of the resins are reinforced. However, I tend to share your concern. See if you can get more specifics about the name of the material being used. Steve Mark & Steven Bornfeld DDS http://www.dentaltwins.com Brooklyn, NY 718-258-5001 apparently, it's a Sinfony-bonded-composite I asked for a porcelain/metal. but according to the lab that cannot b done using the bitemark sent. (why? My temporary feels a bit funny now, how long do they last? what happen if it drops off? (shouldn't be a problem, should it? -- sks > apparently, it's a Sinfony-bonded-composite. > [quoted text clipped - 3 lines] > My temporary feels a bit funny now, how long do they last? what happens > if it drops off? (shouldn't be a problem, should it?) I'm not familiar with Sinfony, though I may look into it when I have the chance. I don't know why the impression can't be used for a porcelain/metal crown--unless the tooth preparation for the Sinfony crown is not adequate for a porcelain metal crown (porcelain/metal may require further reduction of tooth). The temporary crown doesn't fit as well as the permanent one will, and it's certainly not unusual to have some sensitivity. But real pain would be a red flag. Esp. if the tooth has a vital nerve (but even if it doesn't), you should contact your dentist if the temporary crown falls off. Extended time with the temporary off can lead to drifting of the tooth, which means the permanent crown won't fit when it comes in. Steve > > apparently, it's a Sinfony-bonded-composite. > > [quoted text clipped - 17 lines] > > Steve ____________________________________ Sinfony is a laboratory-processed composite resin material, very similar to Concept, Belleglass, Cristobal +, and Sculpture. Such materials are very useful for inlays and some onlays, and have even been used for crowns when you want to avoid much wear against the opposing occlusion. The porcelain-fused-to-metal crowns are generally stronger, but porcelain can sometimes create strong wear against the opposing occlusion. I agree that the same impression for the Sinfony crown would generally be useful for a proposed porcelain/metal crown, unless the Sinfony crown prep was really a modified onlay prep which would not accomodate a porcelain/metal full crown. A porcelain/metal crown prep requires a good degree of tooth reduction to accomodate the layers of metal and ceramic, so sometimes additional re-prepping might be needed. Sometimes dentists use the word "crown" when they really mean some type of onlay, so it's really hard to determine what the situation is in this instance without a direct examination. Best regards, - dentaldoc >>>apparently, it's a Sinfony-bonded-composite. >>> [quoted text clipped - 44 lines] > Best regards, > - dentaldoc Thanks Bill. Don't know if Sinfony is reinforced--I don't know of anyone using Belleglass anymore (I never did)--I've heard it's very soft. I have used some of the lower index ceramics, but the few times I did lab-processed resin onlays my luck with wear and breakage has been rather poor. Steve SignatureMark & Steven Bornfeld DDS http://www.dentaltwins.com Brooklyn, NY 718-258-5001 Thanks for that information guys another thing now is that I went back to have another temp crown fitte for the same tooth and he said that I'd broken the tooth off, which I' pretty certain that I didn't. So he built it up with some permanen stuff and then took another impression Why else would he build it up Are the crowns charged by volume or is there just a fixed charge pe crown. I'm wondering if he's trying to cut his costs even more becaus he thinks I'm messing him about. (building the core of the tooth mor might save him money) I've asked for a metal/porcelain crown twice now and both times he' managed to talk me out of it when I'm in the chair, especially when m mouth is full with something. Then next day I rang up to change it, bu he said it was too late now cos its gone off to the lab -- sks Hard to say much without examining you. If you have any questions, you should discuss them fully with the dentist BEFORE you leave the office. You can always see another dentist and get a second opinion if you still have doubts. > Thanks for that information guys. > [quoted text clipped - 13 lines] > mouth is full with something. Then next day I rang up to change it, but > he said it was too late now cos its gone off to the lab. I'd get out of Dodge ..... -- Joel34 |
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