Dental Which of the following statements is not true about use of silica in the investment materials? A It acts as refractory B It regulates thermal expansion C Quartz and cristobalite are the allotropic form used in dental investments D Beta allotropic form is stable below transition temperature 💡 Explanation Which of the following statements is not true about use of silica in the investment materials? ✓ Correct Answer: D. Beta allotropic form is stable below transition temperature