[Influence of self-tapping parapulpal posts on dentin structures].

A combined light and scanning electron microscopic study in human molars examined the effects of seven different parapulpal screw systems on dentin structure. Dentin changes were systematically categorized into four different groups occurring alone or in combinations. Based on these observations a less traumatic screw system must be postulated. The assessment of a modified system demonstrated a considerable reduction of dentin lesions.