[Analysis on the stress induced by non metallic posts in dental and periodontal support by using the finite element method].
OBJECTIVE
The determination of the influence of non-metallic posts on the stress distribution to the supporting tissues.


METHODS
Two 3D models were created: one intact maxillary incisor and one reconstructed with post (ceramic, carbon fiber and glass fiber). The compressive load (30daN) was applied to an angle of 45 degrees on the palatal surface of the crown. The Algor software computed the stress for each model comparing the maximum registered intensity, localization and concentration into the dento-periodontal complex.


RESULTS
The fiber reinforced posts induced lower stress peak inside the root, the von Mises stress in the teeth reconstructed with carbon and glass fiber post being similar to that recorded in a tooth without post. The ceramic post produced the greatest stress concentration in the middle third of the root, this behavior supporting the potential risk of the vertical root fractures registered "in vivo".


CONCLUSIONS
The fiber reinforced posts are more suitable for the clinical longevity of the tooth, representing the best choice to reconstruct an endodontically treated tooth.
Viţalariu
Anca
A
Universitatea de Medicină şi Farmacie Gr.T. Popa Iaşi, Facultatea de Medicină Dentară.
Comăneci
R
R
Tatarciuc
Monica
M
D002244:Carbon; D000077482:Carbon Fiber; D019245:Compressive Strength; D003764:Dental Materials; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis / Q000379:methods*; D020342:Finite Element Analysis; D006801:Humans; D010515:Periodontal Prosthesis; D011176:Post and Core Technique
D000077482:Carbon Fiber; D003764:Dental Materials; D002244:Carbon