Early resin luting material damage around a circular fiber post in a root canal treated premolar by using micro-computerized tomographic and finite element sub-modeling analyses.

摘要: This study utilizes micro-computerized tomographic (micro-CT) and finite element (FE) sub-modeling analyses to investigate the micro-mechanical behavior associated with voids/bubbles stress at luting material layer understand early damage in a root canal treated premolar. 3-dimensional models of macro-root premolar two sub-models provide void/bubble distribution dimensions were constructed from micro-CT images simulated receive axial lateral forces. The boundary conditions for determined macro-premolar model results applied analysis. first principal stresses dentin, post recorded. revealed that dramatically underestimated because adhesive cannot be captured due coarse mesh high gradient variations between sub- macro-models ranging 2.65 4.5 folds under load mapping location. Stress concentrations found edge values over 20 MPa analysis immediately caused failure/micro-crack. establishes FE techniques can used simulate pattern micro-scale premolar, suggesting attention must paid resin initial failure/debonding when large are generated during procedures.