Dental The change in colour of a traumatized primary incisor usually results from all the following except. A Laceration of periodontal fibres B Diffusion of biliverdin into the dentinal tubules C Development of a heavy layer of secondary dentin D Internal resorption of dentin within the crown 💡 Explanation The change in colour of a traumatized primary incisor usually results from all the following except. ✓ Correct Answer: A. Laceration of periodontal fibres