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KMID : 1149720230130040278
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Clinical Journal of Korean association of Orthodontists
2023 Volume.13 No. 4 p.278 ~ p.286
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Treatment of a Lip Protrusion Patient Using Lingual Orthodontic Appliance with Long Lever-Arm and Skeletal Anchorage
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Noh Min-Ki
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Abstract
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27-year-old woman came to the clinic. Her chief complaint were lip protrusion and lower anterior teeth crowding. She wanted a lingual orthodontic appliance on the maxilla and a labial appliance on the mandible. Because she had lip protrusion with large overjet, premolar extraction treatment was selected. The retraction wire with a long lever-arm and skeletal anchorage system was applied for torque and vertical control of upper anterior teeth. Moreover, additional over-torque was applied on maxillary anterior teeth during making set-up model to prevent excessive torque loss. After orthodontic treatment, the appearance of the lip protrusion was improved. Angle Class I molar and canine relationship were accomplished. The large overjet of anteriors were improved without excessive torque loss of upper anteriors.
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KEYWORD
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Lingual orthodontics, Long lever-arm, Lip protrusion
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FullTexts / Linksout information
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Listed journal information
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