ArticleHua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology2026
[Follow-up study evaluating morphological changes in alveolar bone in the maxillary anterior region after extraction retraction in adult patients treated with clear aligners on the basis of cone beam computed tomography data].
Article in Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesAlveolar bone height and thickness changes in the maxillary anterior region were assessed before treatment (T1), after treatment (T2), and during the retention phase (T3) in patients with maxillary protrusion treated with clear aligners combined with premolar extraction. The aim was to provide clinical insights for safely retracting anterior teeth with clear aligners.
methodsThis retrospective study included 15 patients (2 males and 13 females) with maxillary protrusion, who underwent bilateral maxillary first premolar extraction and anterior tooth retraction with clear aligners. Cone beam computed tomography images were collected at T1, T2, and T3 (≥18 mon-ths post-treatment) for the measurement of vertical alveolar bone height (labial, palatal, mesial, and distal aspects) and horizontal alveolar bone thickness (labial, palatal, and total). Statistical analysis was performed using SPSS 26.0, and changes across phases and correlations were assessed.
resultsAfter orthodontic treatment, the palatal and mesial alveolar bone height of the maxillary anterior teeth significantly decreased (
conclusionsAfter the retraction of maxillary anterior teeth with clear aligners, the alveolar bone height on the mesial and palatal sides of the upper anterior teeth showed considerable reduction. The palatal alveolar bone thickness at the cervical and middle root levels of the upper lateral incisors and canines decreased remarkably. By contrast, the labial alveolar bone thickness at the middle and apical root levels of the upper central incisors significantly increased. At T3-T2, the partial recovery of alveolar bone height and thickness was observed, but pretreatment levels were not reached. Notably, the degree of bone resorption during treatment may influence the remodeling potential at T3.
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