American Board of Orthodontics (ABO) Practice Exam 2026 - Free Orthodontics Practice Questions and Study Guide

Failing to extract an ankylosed molar can lead to significant issues related to arch length and occlusion. When a molar is ankylosed, it becomes fused to the surrounding jawbone, preventing normal movement and function. This can result in arch length loss because the neighboring teeth may drift or shift into the space that would traditionally be occupied by the molar if it were healthy and mobile.

Additionally, the presence of an ankylosed tooth often contributes to occlusal disturbances, which can disrupt the overall bite. This misalignment can lead to uneven wear on the remaining teeth, temporomandibular joint (TMJ) dysfunction, and further orthodontic complications that may require more complex treatment. Therefore, addressing an ankylosed molar through extraction is crucial to maintain the health and proper alignment of the dental arch and occlusion.