Journal of Dental Research, Vol 56, 1463-1467, Copyright © 1977 by International & American Associations for Dental Research Online Journals
The principal stress distribution in a root with a loaded post in model experiments
T. Derand
The principal stress distribution in a root with a loaded post was analyzed
in model experiments, in which emphasis was directed to the cervical
boundary of the root where the stresses are greatest. Maximum stresses were
found in the inner proximal sides, and were stronger when the prepared root
canal walls were parallel. When contact between post and root was reduced,
stresses decreased. These findings point to the importance of sparing tooth
substance in the proximal parts of the canal in order to reduce the risk of
breaking the cement layer and loosening the post.
