What is the primary reason to maintain dentin structure in proximal areas when fabricating posts?

The primary reason for maintaining dentin structure in proximal areas when fabricating posts is linked to the distribution of stress. The greatest stress concentrations typically occur in this area, particularly during functional forces and occlusal loading. This is crucial for the longevity and success of the restorative procedure. Preserving the dentin not only helps absorb and distribute these forces more evenly but also strengthens the tooth structure, thereby mitigating the risk of fracture and ensuring the overall stability of the post-and-core system.

Maintaining integrity in this region is vital because it supports the surrounding enamel and increases the resistance to biomechanical failures that could occur due to stress concentrations. Enhancing the structural support in these areas can significantly improve the performance of the final restoration in both function and longevity.