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Medical Forum / General / Dentistry / March 2007Crown and onlay
What is difference between crown and onlay? A crown: The old filling is removed, decay is cleaned out, a filling is put back in, and then,,,, the tooth is ground down 360 degrees. All four sides are reduced in thickness and the biting surface is shortened. The crown then fits over this prepared area like a bottle cap, re-establishing full contours. An onlay: The old filling is removed, decay is cleaned out, an piece of porcelain is then fabricated which fits the space like a puzzle piece and is bonded in place filling the hole. Any and all solid tooth structure remains in place. Studies show expected failures during the first fifteen years to be very close for both procedures. Inherently, most dentists would vastly prefer an onlay in their own mouth, but do exclusively full crowns on their patients.  Signature/ Amatus / > What is difference between crown and onlay? > A crown: The old filling is removed, decay is cleaned out, a filling is put > back in, and then,,,, the tooth is ground down 360 degrees. All four sides [quoted text clipped - 23 lines] > > > What is difference between crown and onlay? In the case where 3/4 crown is lost, would onlay still be possible? Doing crown will have to cut all natural crown off and then build up. Is it better to do onlay to save more tooth? Just do a new 3/4 crown. Almost the same as an onlay (depending on which school you trained at). Signature/ Amatus / >> A crown: The old filling is removed, decay is cleaned out, a filling is >> put [quoted text clipped - 32 lines] > Doing crown will have to cut all natural crown off and then build up. > Is it better to do onlay to save more tooth? > A crown: The old filling is removed, decay is cleaned out, a filling is put > back in, and then,,,, the tooth is ground down 360 degrees. All four sides [quoted text clipped - 23 lines] > > > What is difference between crown and onlay? In the case where 3/4 crown is lost, would onlay still be possible? My first molar had a big cavity and had root canal and old silver fillings. Recently a piece of tooth cracked off. Doing crown will have to cut all natural crown off and then build up. Is it better to do onlay to save more tooth? > Inherently, most dentists would vastly prefer an onlay in their own mouth, > but do exclusively full crowns on their patients. Little bit prejudiced? I have three crowns and zero onlays in my own mouth (all are about 8-10 years old, but I do wear an NTI...the last 6-7 years). :-) D When I ask dentists which they would prefer on their own teeth, most respond with onlay/inlay. Personal anedotal experience. Signature/ Amatus / > >> Inherently, most dentists would vastly prefer an onlay in their own [quoted text clipped - 7 lines] > :-) > D > > Inherently, most dentists would vastly prefer an onlay in their own mouth, > > but do exclusively full crowns on their patients. [quoted text clipped - 6 lines] > :-) > D Prejudiced? Amatus?? Never!!!! (incidentally, I agree that most people for whom onlays/inlays are an option prefer them over crowns - but that's beside the point). >What is difference between crown and onlay? Mostly shape of the preparation and the ammount of conserved tooth structure is usually (not always0 greater with an onlay. The downside to onlays is the increased linear measurement of the margins. > Mostly shape of the preparation and the ammount > of conserved tooth structure is usually (not always0 > greater with an onlay. The downside to onlays is > the increased linear measurement of the margins. Plus, virtually all of the margins are where you can reach them with a toothbrush on an onlay. |
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