Flexible post system featuring tapered, split-shank posts that provide a smooth transition between the post and the root canal while redirecting insertion stresses toward the post vs. the root. Sharp threads ensure smooth cuts into the dentin while avoiding compression of dentin. Posts are designed with a venting channel to avoid hydrostatic pressure during cementation and feature a serrated head for excellent retention of core build-up materials. The wider coronal shank ensures a proper fit between the post and the wider coronal section of the root canal. Cross slots in the post head allow for a smooth insertion of a post wrench to easily facilitate post placement in narrow areas.