Gummy Smile과 과개교합을 동반한 II급 부정교합 환자의 미니스크루를 이용한 비발치 교정치료

Nonextraction Treatment of a Class II Malocclusion Patient with a Deepbite and Gummy Smile Using Miniscrew Anchorage

Gummy smile is a clinical condition that refers to excessive gingival display during smile, which is often accompanied by vertical dentoalveolar excess in the anterior region. With orthodontic miniscrews, three-dimensional total arch movement, including intrusion without side effects on the anchor tooth can be achieved. But proper biomechanical understanding and careful monitoring are required to design an appropriate force system and to prevent unwanted side effects. An 18-year-old girl presented with chief complaints of gummy smile and crowding. She showed a deep bite and skeletal Class II relationship. The patient was treated with total arch intrusion and distalization using two maxillary inter-premolar orthodontic miniscrews which provided biomechanically effective force system to correct the gummy smile. Counter-clockwise autorotation of the mandible was also obtained improving her facial profile.