American Board of Orthodontics (ABO) Practice Exam 2026 – All-in-One Resource to Master Your Orthodontics Certification!

When the distobuccal (DB) root of the upper first molar (U6) is contacting the mesiobuccal (MB) root of the upper second molar (U7), it indicates a potential issue with the occlusal relationships or eruption patterns that may lead to further complications, such as root resorption or periodontal issues. The recommended approach in such a scenario is to intrude U6 and open the embrasure space.

This procedure aims to adjust the positioning of U6 to alleviate the contact between the roots, which can help maintain the health of the surrounding periodontal tissues and prevent complications associated with direct root contact. Intruding the U6 may also aid in creating an optimal arch form, enhancing occlusal relationships, and allowing for proper space management for future orthodontic treatment. Additionally, leveling the bone in this context refers to ensuring that the periodontal bone structures around the teeth are aligned appropriately, which can further aid in orthodontic stability.

The other options, by comparison, do not substantively address the biomechanical implications of root contact. Simply extracting U6 can lead to further complications, potentially inciting a cascade of issues in the dental arch. Leaving it as is neglects the problem and poses a risk of