Treatment of Skeletal Class II Protrusion with Gummy Smile Using a Antero-Posterior Lingual Retractor
유호빈, 안효원,
소속 상세정보
유호빈 ( Yu Ho-Been ) - Kyung Hee University School of Dentistry Department of Orthodontics
안효원 ( Ahn Hyo-Won ) - Kyung Hee University School of Dentistry Department of Orthodontics
KMID : 1149920180070010018
Abstract
In this case report, we present the application of antero-posterior lingual retractor (APLR) for a protrusion and gummy smile case which needs anterior torque control and intrusion of anterior teeth. After total 24 months of treatment, the superimposition between pretreatment and post-treatment showed slight proclination of the maxillary incisiors (FH-U1 angle, from 111.5o to 117.5o) during 3.0 mm intrusion and 5.0 mm retraction of the incisal edge. The maxillary molars were intruded up to 0.5 mm, which was followed by autorotation of the mandible (mandibular plane to FH angle, from 35.3o to 34.6o) with 1.0 mm advancement of pogonion. The APLR system produced excellent and efficient retraction with good torque control and significant intrusion of the anterior segment. This system approach would be an effective option for skeletal Class II with the bialveolar protrusion and gummy smile patient.
키워드
Anterior-posterior lingual retractor; Gummy smile; lip protrusion; Torque control; Vertical control
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