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<blockquote data-quote="Al." data-source="post: 7132" data-attributes="member: 382"><p>Heres my opinion, tell me what you think. i dont know about capteks but I have read all the textbooks and manufactors recommendations on metal design. My latest one is Ivoclars inline manual. It has even gone as far as showing metal support for the cusp of carabelli. They recommend one way is to wax a full crn then cut back. Your talking about a seriously engineered coping for a pfm. I think some of that is them covering their a## so they dont get blamed for fractures.</p><p></p><p>My longest account is my father. Ive been doing his work for 31 yrs. Besides the sharp cusp tips and D edges of some anteriors shearing off and having to be smoothed off in the mouth, where I have seen fractures is all teeth of bruxers and lower molars, esp. 2nd molars and esp on the DL of them, and on implants with out proper support.</p><p></p><p>With our modern materials I dont see alot of fractures in upper molars or bi's or anteriors.</p><p>I always extend my metal on those contacts I need to streach to close the gap and I make my anteriors bulbius on the M & D for support and of course on cases with a ton of room I add more wax, on all bruxers and 2nd molars I build support cusps.</p><p>On everyting else uppers, lower bi's etc I dip and seal the coping.</p><p>There is just not enough money in this business or I should say there are not enough Drs willing to pay the price it would cost me to make one of those enginered text book substructures for every pfm I make.</p><p></p><p>I think that the occlusal contacts on pfms are more important. Having occlusion in centric only and 0 interferences on my crns in working prevent alot of fratures.</p><p></p><p>What do you think?</p></blockquote><p></p>
[QUOTE="Al., post: 7132, member: 382"] Heres my opinion, tell me what you think. i dont know about capteks but I have read all the textbooks and manufactors recommendations on metal design. My latest one is Ivoclars inline manual. It has even gone as far as showing metal support for the cusp of carabelli. They recommend one way is to wax a full crn then cut back. Your talking about a seriously engineered coping for a pfm. I think some of that is them covering their a## so they dont get blamed for fractures. My longest account is my father. Ive been doing his work for 31 yrs. Besides the sharp cusp tips and D edges of some anteriors shearing off and having to be smoothed off in the mouth, where I have seen fractures is all teeth of bruxers and lower molars, esp. 2nd molars and esp on the DL of them, and on implants with out proper support. With our modern materials I dont see alot of fractures in upper molars or bi's or anteriors. I always extend my metal on those contacts I need to streach to close the gap and I make my anteriors bulbius on the M & D for support and of course on cases with a ton of room I add more wax, on all bruxers and 2nd molars I build support cusps. On everyting else uppers, lower bi's etc I dip and seal the coping. There is just not enough money in this business or I should say there are not enough Drs willing to pay the price it would cost me to make one of those enginered text book substructures for every pfm I make. I think that the occlusal contacts on pfms are more important. Having occlusion in centric only and 0 interferences on my crns in working prevent alot of fratures. What do you think? [/QUOTE]
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