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Combined use of miniscrews and continuous arch for intrusive root movement of incisors in Class II division 2 with gummy smile

 Sung-Jin Kim  ;  Jin-Wook Kim  ;  Tae-Hyun Choi  ;  Kee-Joon Lee 
 ANGLE ORTHODONTIST, Vol.84(5) : 910-918, 2014 
Journal Title
Issue Date
Bicuspid/surgery ; Bone Screws* ; Cuspid/pathology ; Female ; Follow-Up Studies ; Gingiva/pathology* ; Humans ; Incisor/pathology* ; Lip/pathology ; Malocclusion, Angle Class II/therapy* ; Maxilla/pathology ; Miniaturization ; Molar/surgery ; Orthodontic Anchorage Procedures/instrumentation* ; Orthodontic Appliance Design ; Orthodontic Wires* ; Patient Care Planning ; Smiling ; Tooth Movement Techniques/instrumentation* ; Tooth Root/pathology* ; Tooth, Deciduous/surgery ; Tooth, Impacted/therapy ; Torque ; Treatment Outcome ; Young Adult
Class II division 2 ; Continuous arch ; Gummy smile ; Intrusion ; Miniscrew ; Torque control
Adequate intrusion and torque control of the retroclined maxillary incisors are critical for the treatment of Class II division 2 (div2) malocclusion. In addition, anterior retraction via lingual root movement can be challenging. This case report demonstrates a combined use of miniscrews and continuous arch with additional torque for intrusion, retraction, and torque control of maxillary incisors in the Class II div2 with gummy smile. A 20-year-old woman presented with multiple issues, including impacted canine, lip protrusion, prolonged retained mandibular primary molar, and two missing maxillary premolars. In order to improve her facial profile and eliminate the need for prosthetic work, the mandibular primary molar and contralateral premolar were extracted. Two miniscrews were placed at the maxillary buccal alveolar bone to apply the posterosuperior force for retraction of anterior teeth, with additional labial crown torque on the arch wire. The results were the intrusion (4 mm) and lingual root movement (17°) of the maxillary incisors without anchorage loss of maxillary molars, flattening of the Curve of Spee, and Class I molar relation that were maintained after 50 months of retention period. The combined use of miniscrews and continuous arch could be a reliable and effective treatment modality for torque control and intrusion of retroclined maxillary incisors in the Class II div2 patient.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Others (기타) > 1. Journal Papers
Yonsei Authors
Kim, Sung Jin(김성진) ORCID logo https://orcid.org/0000-0003-4115-0403
Lee, Kee Joon(이기준) ORCID logo https://orcid.org/0000-0002-0782-3128
Choi, Tae Hyun(최태현)
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