What are the preeruptive movements dependent on?

• A. Total bodily movement of tooth germ
• B. Growth can occur in one part of the tooth germ while the other remains fixed; can change center point in each germ
• C. Bone resorption and bone deposition activities will allow the tooth germ to change positions
• D. All of the above

Answer: (D)

Preeruptive movements come from several interacting forces that move the tooth germ before eruption. The entire germ can shift position as the jaw and surrounding bone grow, so there’s a bodily movement of the tooth germ within its socket. At the same time, growth within the germ isn’t uniform—one part may enlarge while another stays relatively fixed, shifting the germ’s center of growth or resistance and altering its position. Surrounding bone is also actively remodeled through resorption and deposition, which creates space and pathways for movement. Because all of these processes can occur together, the preeruptive movement of a tooth germ depends on bodily movement, differential internal growth, and bone remodeling.