Key factors for successful eruption of the mandibular third molar after extraction of the mandibular second molar.

ABSTRACT:

Objective

Extraction of the mandibular second molar (L7) and substitution by the mandibular third molar (L8) is an effective treatment option. This study aimed to evaluate spontaneously erupted L8 occlusion after L7 extraction, and identify the influencing factors.

Methods

This study assessed 46 L8 from 28 patients using dental study models, panoramic radiographs, and lateral cephalograms obtained during L7 extraction (T1) and completion of L8 eruption (T2). At T2, samples were categorized as acceptable (A-group) or unacceptable (U-group) based on the American Board of Orthodontics index. L8 angulation and position, retromolar space, distance between the Xi point and mandibular first molar (L6), and Nolla stage were compared between the groups to identify the predictive fact

SUBMITTER: Park JJ 

PROVIDER: S-EPMC11922633 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature