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Main Instructor 徐儷芳
Department / Institution Department of Orthodontics, Taipei Mackay Memorial Hospital
Classification Case report
    Moving teeth through the maxillary sinus is considered one of the most challenging problems in orthodontics. Herein we report a case with maxillary sinus pnuematization from previous extractions. And she was treated with bodily movement of teeth through the sinus floor.
    The 38-year-old woman presented with a convex profile, lip protrusion, and gingival display in full smiling. The Class I malocclusion with moderate space deficiency of upper and lower arches (4/ 5.5 mm). The #14 had a large decay and #26 was missing. There was postextraction sinus pneumatization extended near the alveolar process of the #26 edentulous space. Cephalometric analysis showed a skeletal Class II with normodivergent facial pattern (ANB = 6°, MPA = 35°). Normal inclination of maxillary incisors (U1-SN = 108.5° ) , and labial inclination of lower incisors (L1-MP = 105.5°). The treatment plan included extraction of #14, #34, #44 and closed the #26 space to resolve the space problem and lip protrusion, and installation of an upper anterior subapical miniscrew to resolve gummy smile. Lip protrusion was improved and stable occlusion was established after treatment. The total treatment duration was 2 years and 6 months. The panoramic radiograph showed acceptable root parallelism and no apparent root resorption. The cephalometric analysis showed both upper and lower anterior teeth were retracted and intruded. The mandibular plane angle was maintained.
「Discussion and Summary」
This case report demonstrates that successful tooth movement through the maxillary sinus can be achieved without noticeable side effects. New bone formation followed tooth movement, and changes in the size and shape of the maxillary sinus were observed. 
Orthodontic Tooth Movement Through The Maxillary Sinus in An Adult