Influence of the cervical margin relocation on stress distribution -

Aim: Evaluate the influence of cervical margin relocation (CMR) on stress distribution in lower first molar restored with direct nano-ceramic composite (zenit). Methods: A 3D model was modeled and used. Standardized mesio-occluso-distal (MOD) preparation consisted two models used this study mesial subgingival II. applied II using flowable or resin glass ionomer (Riva). Both were nanoceramic then subjected to six runs (2 for I 4 II) load (100N) as cases, one at (11º) other (45º) from vertical axis. The distributions (FEA) final restoration material analyzed models. Results: recorded an equivalent Von Mises Total deformation restoration, regardless difference oblique angle incidence (11º 45º) type there no significant between CMR (model without I). Conclusions: technique seems be biomechanically beneficial high eccentric stress, combination improved biomechanical behavior cavities extended below cement enamel junction modulus elasticity like (Riva) exhibits a more uniform distribution.