Comparison of soft tissue changes between incisor tipping and translation after premolar extraction
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Objective: This study compared soft tissue changes after extraction of the four premolars followed by maximum retraction of the anterior teeth according to the type of anterior teeth movement: tipping and translation. Methods: Patients who had undergone orthodontic treatment involving the extraction of four premolars were retrospectively selected and divided into either the tipping (n = 27) or translation (n = 26) groups based on the retraction of the incisor root apex and the axis changes of the incisors during the treatment period. Lateral pre- and post-treatment cephalograms were analyzed. Results: There were no significant differences between the tipping and translation groups before treatment. The retraction amounts of the root apex of the upper and lower incisors in the tipping group were 0.33 and 0.26 mm, respectively, and 5.02 and 5.31 mm, respectively, in the translation group (p < 0.001). The posterior movements of soft tissue points A and B in the tipping group were 0.61 and 1.25 mm, respectively, and 1.10 and 3.25 mm, respectively, in the translation group (p < 0.01). The mentolabial sulcus angle increased by 5.89° in the tipping group, whereas it decreased by 8.13° in the translation group (p < 0.001). Conclusions: An increased amount of retraction of the incisor root apex led to the increased posterior movement of soft tissue points A and B, and this appeared more distinct in cases involving the lower incisor and lower lip.
Abstract
Objective: This study compared soft tissue changes after extraction of the four premolars followed by maximum retraction of the anterior teeth according to the type of anterior teeth movement: tipping and translation. Methods: Patients who had undergone orthodontic treatment involving the extraction of four premolars were retrospectively selected and divided into either the tipping (n = 27) or translation (n = 26) groups based on the retraction of the incisor root apex and the axis changes of the incisors during the treatment period. Lateral pre- and post-treatment cephalograms were analyzed. Results: There were no significant differences between the tipping and translation groups before treatment. The retraction amounts of the root apex of the upper and lower incisors in the tipping group were 0.33 and 0.26 mm, respectively, and 5.02 and 5.31 mm, respectively, in the translation group (p < 0.001). The posterior movements of soft tissue points A and B in the tipping group were 0.61 and 1.25 mm, respectively, and 1.10 and 3.25 mm, respectively, in the translation group (p < 0.01). The mentolabial sulcus angle increased by 5.89° in the tipping group, whereas it decreased by 8.13° in the translation group (p < 0.001). Conclusions: An increased amount of retraction of the incisor root apex led to the increased posterior movement of soft tissue points A and B, and this appeared more distinct in cases involving the lower incisor and lower lip.
참고문헌 (24)
- Hayashida H, "Effects of retraction of anterior teeth and initial soft tissue variables on lip changes in Japanese adults", Eur J Orthod, 33, pp.419~426 (2011)
- Bravo LA, "Soft tissue facial profile changes after orthodontic treatment with four premolars extracted", Angle Orthod, 64, pp.31~42 (1994)
- Kim K, "Unpredictability of soft tissue changes after camouflage treatment of Class II division 1 malocclusion with maximum anterior retraction using miniscrews", Angle Orthod, 87, pp.230~238 (2017)
- Caplan MJ, "The effect of premolar extractions on the soft-tissue profile in adult African American females", Angle Orthod, 67, pp.129~136 (1997)
- Talass MF, "Soft-tissue profile changes resulting from retraction of maxillary incisors", Am J Orthod Dentofacial Orthop, 91, pp.385~394 (1987)
- Hershey HG, "Incisor tooth retraction and subsequent profile change in postadolescent female patients", Am J Orthod, 61, pp.45~54 (1972)
- Kuroda S, "Class II malocclusion treated with miniscrew anchorage : comparison with traditional orthodontic mechanics outcomes", Am J Orthod Dentofacial Orthop, 135, pp.302~309 (2009)
- Antoszewska-Smith J, "Effectiveness of orthodontic miniscrew implants in anchorage reinforcement during en-masse retraction : a systematic review and meta-analysis", Am J Orthod Dentofacial Orthop, 151, pp.440~455 (2017)
- Vibhute PJ, "Optimizing anterior en masse retraction with miniscrew anchorage", Case Rep Dent, 2011, pp.475638~ (2011)
- Kim SJ, "Combined use of miniscrews and continuous arch for intrusive root movement of incisors in Class II division 2 with gummy smile", Angle Orthod, 84, pp.910~918 (2014)
- Park HS, "Sliding mechanics with microscrew implant anchorage", Angle Orthod, 74, pp.703~710 (2004)
- Ji-Hwan Kim, "Comparison of cephalometric norms between Mongolian and Korean adults with normal occlusions and well-balanced profiles", 대한치과교정학회지, 41(1), pp.42~50 (2011), 대한치과교정학회
- Diels RM, "Changes in soft tissue profile of African-Americans following extraction treatment", Angle Orthod, 65, pp.285~292 (1995)
- Bergman RT, "Longitudinal study of cephalometric soft tissue profile traits between the ages of 6 and 18 years", Angle Orthod, 84, pp.48~55 (2014)
- Lee KJ, "Advanced biomechanics for total arch movement and non-surgical treatment for hyperdivergent faces", Semin Orthod, 24, pp.83~94 (2018)
- Sharma JN, "Skeletal and soft tissue point A and B changes following orthodontic treatment of Nepalese Class I bimaxillary protrusive patients", Angle Orthod, 80, pp.91~96 (2010)
- Zhang S, "Skelate changes induced by orthodontic in class II division 1by CBCT : a long-term follow-up prospective study", Int J Clin Exp Med, 8, pp.11312~11316 (2015)
- Huang YP, "Correlation between objective and subjective evaluation of profile in bimaxillary protrusion patients after orthodontic treatment", Angle Orthod, 85, pp.690~698 (2015)
- Fang Ning, "Camouflage treatment in adult skeletal Class III cases by extraction of two lower premolars", 대한치과교정학회지, 40(5), pp.349~357 (2010), 대한치과교정학회
- Martinez P, "Orthodontic camouflage versus orthognathic surgery for class III deformity : comparative cephalometric analysis", Int J Oral Maxillofac Surg, 46, pp.490~495 (2017)
- Georgalis K, "A study of Class III treatment : orthodontic camouflage vs orthognathic surgery", Aust Orthod J, 31, pp.138~148 (2015)
- Yogosawa F, "Predicting soft tissue profile changes concurrent with orthodontic treatment", Angle Orthod, 60, pp.199~206 (1990)
- Brock RA 2nd, "Ethnic differences in upper lip response to incisor retraction", Am J Orthod Dentofacial Orthop, 127, pp.683~691 (2005)
- Dong Y, "Influence of sex and body mass index on facial soft tissue thickness measurements of the Northern Chinese adult population", Forensic Sci Int, 222, pp.396~ (2012)