"Post length should at least equal clinical crown length" What does this mean? The clinical crown you are going to build up? and if so, say the build up will be 10mm above the CEJ, does the post have to be 10mm total as in 5mm in the canal and 5mm above CEJ?
How long should a post be?
- Thread starter valkairon
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It's about leverage so if your final restoration will be 10mm above the margin you ideally want the post 10mm below the remaining tooth or else you create a longer lever arm which would cause more forces and a higher risk of failure
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At minimum I want to have at least as much length of the post retained inside the root/what's left of the pulp chamber/pulpal floor structure as I have inside my build up material/crown. Ideally I'd like more inside the remaining tooth structure than inside the build up material. If it's less inside the build up material than inside the remaining tooth structure than basically put it's only a matter of time until the unfavorable physics of that scenario "wins" and the post either fractures or works its way loose from inside the tooth 
Obviously sometimes root anatomy (width, length and possible curvatures) can effect what size post clinically you can use, so there are times, and often unfortunately these times become more apparent after they present in your office as a failure of something that you did in the past, where you'll realize that the only type of "post" that is going to work, is an implant!
Obviously sometimes root anatomy (width, length and possible curvatures) can effect what size post clinically you can use, so there are times, and often unfortunately these times become more apparent after they present in your office as a failure of something that you did in the past, where you'll realize that the only type of "post" that is going to work, is an implant!
