Which statement about root elongation in eruption is correct?

• A. Increasing root length helps push eruption; teeth with fully formed roots may still fail to erupt
• B. Increasing root length prevents eruption
• C. Teeth with limited root formation never erupt
• D. Root length has no effect on eruption

Answer: (A)

Root elongation contributes to eruption by helping generate the eruptive force as the tooth root lengthens and the surrounding tissues remodel to create a path for movement. The growing root interacts with the dental follicle and periodontal ligament to facilitate movement through the bone, but eruption is not strictly dependent on a fully formed root. In practice, eruption can begin before the root is fully formed, and teeth with mature, fully formed roots can still fail to erupt if there’s a blockage, ankylosis, or other hindrances. So the statement that increasing root length helps push eruption best captures what actually happens: root elongation supports eruption, yet complete root formation does not guarantee it.