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Medical Forum / General / Dentistry / April 2006how long do they last?
I am wondering from other dentists in the group what is the average life expanceity of an well placed.. 4 surface posterior amalgam 4 surface posetrior composite gold posterior onlay I am not placing that many these days as I am an orthodontist, however I guess 15-20 years 5-7 years 15-35+ years > I am wondering from other dentists in the group what is the average life > expanceity of an well placed.. [quoted text clipped - 9 lines] > 5-7 years > 15-35+ years There are of course too many variables to give any but a general impression. I have seen even large amalgams last as long as 50 years. However, most of these were not only carefully placed but carefully polished--something few of us do anymore. Careful polishing seems to greatly enhance long-term marginal integrity. Of course, if a patient has significant caries activity (they must have needed that 4-surface restoration for a reason, right?) the restoration longevity is usually limited by recurrent decay, not by gross failure of the restoration itself. I have on occasion done large resin buildups or restorations. If I do, it is usually because a patient cannot afford a crown or inlay. I tell patients that I do not expect it to last forever, and that they should expect they will be needing a crown eventually. I have seen some of these hold up so far for several years, but large resin restorations in my office fail more frequently than amalgams of the same size. I have seen occasional patients with old (over 10 years) resin restorations that have held up marginally; many of these show significant occlusal wear. However, there has been improvement in the resins over time, so I would expect improving marginal and occlusal properties. I would only add that (as you might expect) resin restorations ending interproximally on dentin have a terrible incidence of failure due to recurrent decay--I don't care what generation bonding agent you use. I've never done a large number of gold inlays/onlays. It may be patially an East Coast--West Coast difference. Most of my patients with extensive caries--I don't want to give them an expensive gorgeous restoration with miles of supragingival margins. However, when these work, they work essentially forever. Steve > I am wondering from other dentists in the group what is the average > life expanceity of an well placed.. > > 4 surface posterior amalgam 0 > 4 surface posetrior composite 20-25y > gold posterior onlay 20-50y All the best, Proka > > I am wondering from other dentists in the group what is the average > > life expanceity of an well placed.. > > > > 4 surface posterior amalgam > > 0 Are you serious? That is a dopey response. Say you don't like amalgam and won't use it if you feel that way, but to hint an amalgam won't last a year is misleading and dishonest In my experience most large amalgams or composites will not last as long as a crown or onlay, as once a filling reaches a certain size it is incapable of withstanding the forces of chewing for very long. In other words, a more conservative filling may indeed last 20 years, but as they get larger, that lifespan will decrease. > > 4 surface posetrior composite > > 20-25y There may be some miracle workers out there who can place a 4 surface resin that will last 20-25 years, but I haven't seen many of them! The materials simply begin to breakdown before that many years have passed. > > gold posterior onlay > > 20-50y Finally I agree! I had a patient in his late 90's who had a mouth full of gold that had been placed almost 75 years earlier and looked great. T > Are you serious? That is a dopey response. Say you don't like amalgam and > won't use it if you feel that way, but to hint an amalgam won't last a year > is misleading and dishonest Was it Yogi who said something like: "If they don't want to come to the game, there's no way you can keep them from coming!" Steve > In my experience most large amalgams or composites will not last as long as > a crown or onlay, as once a filling reaches a certain size it is incapable [quoted text clipped - 18 lines] > > T > > Are you serious? That is a dopey response. Say you don't like amalgam and > > won't use it if you feel that way, but to hint an amalgam won't last a year [quoted text clipped - 4 lines] > > Steve And, "Nobody goes there anymore . . . it's too crowded!" - dentaldoc What are your thoughts on CEREC inlays, onlays, and crowns?? I hear they are quite good, only take one visit and don't require that horrible impression material. Aren't those ceramic as well? I would think that would last a good long time. Your input is appreciated. kevin > > news:200603292238348930%DrBraces@Orthodonticscom... > > > I am wondering from other dentists in the group what is the average [quoted text clipped - 23 lines] > > T > What are your thoughts on CEREC inlays, onlays, and crowns?? > I hear they are quite good, only take one visit and don't require that [quoted text clipped - 3 lines] > Your input is appreciated. > kevin A dentist now left for the other forum has been using CEREC for years with apparently excellent success. They are indeed ceramic; and while any ceramic can fracture, I see no reason that they wouldn't hold up very well indeed if done correctly. Steve >>>news:200603292238348930%DrBraces@Orthodonticscom... >>> [quoted text clipped - 25 lines] >> >>T > > > I am wondering from other dentists in the group what is the average > > > life expanceity of an well placed.. [quoted text clipped - 6 lines] > won't use it if you feel that way, but to hint an amalgam won't last a year > is misleading and dishonest 25 y for 1/2 elimination (of poison Hg), 100-200 mV battery? No thanks! > In my experience most large amalgams or composites will not last as long as > a crown or onlay, as once a filling reaches a certain size it is incapable [quoted text clipped - 9 lines] > that will last 20-25 years, but I haven't seen many of them! The materials > simply begin to breakdown before that many years have passed. I did it so many times, so I am magician? Wow! > > > gold posterior onlay > > [quoted text clipped - 4 lines] > > T I don't know why this question dos not including composite or ceramic inlays, but OK, that's it. All the best, Proka Old story ..... restorations never decay .... teeth do! It all depends on the WORKMANSHIP! Joe -- Joel34 > Old story ..... restorations never decay .... teeth do! > [quoted text clipped - 4 lines] > -- > Joel344 Hardworkminership? All the best, Proka I know how to make a pair of pants last ....... ANSWER: Make the coat and vest first ......... *************************************** Dr.Braces Wrote: > I am wondering from other dentists in the group what is the average > life expanceity of an well placed.. [quoted text clipped - 9 lines] > 5-7 years > 15-35+ year -- Joel34 |
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