Why TruNatomy? The Challenge: Preserving Structural Dentin and Tooth Integrity. For more than 30 years, endodontic research has supported the need to keep the foramen size as small as practical. Today, traditional NiTi instrumentation only contacts 65% of the complex anatomy—leaving spaces only irrigation can remove. But if you remove more tooth structure, you may compromise tooth strength. The Solution: TruNatomy is a complete clinical solution, specifically designed to respect the true, natural anatomy of the root canal system to preserve structural dentin and tooth integrity.