Dental Why are rounded internal line angles desirable in the preparation of amalgam restorations in primary teeth? A They increase retention B They conserve tooth structure C They increase resistance D They decreases internal stresses in the restorative material 💡 Explanation Why are rounded internal line angles desirable in the preparation of amalgam restorations in primary teeth? ✓ Correct Answer: D. They decreases internal stresses in the restorative material