Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study

Lu, Wenxin; Zhang, Xu; Li, Mei; Wang, Pengfei; He, Jiarong; Liu, Yu

doi:10.1186/s12903-020-01099-2

Cited by 15 publications

(12 citation statements)

References 28 publications

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“…Additionally, soft tissues around the chin region and upper lip thickness have been reported to be relatively stable. 2 , 29 In this study, Pearson correlation analysis showed that variables associated with ideal maxillary incisor position generally showed strong correlations with nose and chin morphology. The distances of U1-APog, U1-Ap, U1-NA, U1-NPog, and U1-Sn vert positively correlated with the prominence of the nose; moreover, U1-APog distance, U1-Np, and U1-Sn vert showed positive correlations with soft tissue chin thickness.…”

Section: Discussionmentioning

confidence: 52%

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Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study

et al. 2022

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Objective To provide reliable prediction models based on dentoskeletal and soft tissue variables for customizing maxillary incisor positions and to optimize digitalized orthodontic treatment planning. Methods This study included 244 Chinese women (age, 18–40 years old) with esthetic profiles after orthodontic treatment with fixed appliances (133 in group I 1° ≤ The angle between the nasion [N]-A point [A] plane and the N-B point [B] plane [ANB] ≤ 4°; 111 in group II 4° < ANB ≤ 7°). Dental, skeletal, and soft tissue measurements were performed on lateral cephalograms of the participants. Correlation and multiple linear regression analyses were used to determine the influence of dentoskeletal and soft tissue variables on maxillary incisor position. Results The ideal anteroposterior position of the maxillary incisor varied between sagittal skeletal patterns. The position of the maxillary incisor correlated with the sagittal discrepancy between the maxilla and the mandible (ANB), protrusion of the midface, nasal tip projection, development of the chin, and inclination of both the maxillary and mandibular incisors. Distance from the maxillary central incisor to nasion-pogonion plane predicted using multiple linear regression analysis was accurate and could be a practical measurement in orthodontic treatment planning. Conclusions Instead of using an average value or norm, orthodontists should customize a patient’s ideal maxillary incisor position using dentoskeletal and soft tissue evaluations.

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Section: Discussionmentioning

confidence: 52%

“… 1 In particular, the sagittal position and inclination of the incisors are highly relevant to lip and chin prominence. 1 , 2 Thus, orthodontists must determine the ideal position of the incisors when formulating the treatment plan, selecting the extraction vs. non-extraction approach, and adopting an anchorage design.…”

Section: Introductionmentioning

confidence: 99%

Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study

et al. 2022

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“…Convex deformity has always been a problem that concerns some Chinese adults a lot [ 42 , 43 ]. Adult patients with convex deformity, mainly aged from 18 to 40, have high treatment expectations, demanding the most retraction to achieve a straight profile [ 44 , 45 ]. The typical orthodontic treatment is the anterior teeth retraction after the extraction of first premolars [ 46 ].…”

Section: Discussionmentioning

confidence: 99%

Efficacy and safety of piezocision in accelerating maxillary anterior teeth en-masse retraction: study protocol for a randomized controlled trial

Tong

et al. 2022

Trials

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Background Orthodontic treatment is commonly more time-consuming in adults than in teenagers, especially when it comes to the maxillary en-masse retraction, which may take 9 months or even longer. As to solve this concern, orthodontists have been striving to seek new methods for shortening orthodontic treatment time. Piezocision, as a popular alternative treatment, has been widely used in different types of tooth movement. However, its effect on en-masse retraction of maxillary anterior teeth remains unclear. This randomized controlled trial intends to figure out the role piezocision plays in accelerating en-masse retraction. Methods This protocol is designed for a prospective, single-center, assessor-blinded and parallel-group randomized controlled trial. Twenty adult patients aged from 18 to 40 whose orthodontic treatment required bilateral maxillary first premolars extraction will be randomly assigned to the piezocision group and the control group at a ratio of 1:1. The piezocision group will undergo en-masse retraction immediately after the piezo surgery, while the control group will start en-masse retraction directly. Both groups will be followed up every 2 weeks to maintain the retraction force until the end of space closure. The space closing time is set as the primary endpoint. Meanwhile, the secondary endpoints include the change of root length, labial and palatal alveolar bone thickness, vertical bone height, probing depth of maxillary anterior teeth, cephalometric measurements, visual analogue scale, and postoperative satisfaction questionnaire. Discussion This study will attempt to provide more convincing evidence to verify whether piezocision will shorten the time of en-masse retraction or not. Distinguished with previous studies, our study has made some innovations in orthodontic procedure and primary outcome measurement, aiming to clarify the efficacy and safety of piezocision-assisted en-masse retraction in Chinese population. Trial registration Chinese Clinical Trial Registry ChiCTR 1900024297. Registered on 5 July 2019

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“…Різні частини обличчя, включаючи морфологію чола, носа, підборіддя та положення губ, повинні бути гармонійно скоординовані для досягнення привабливості обличчя. Окрім суб'єктивної оцінки фотографій, ортодонти також покладаються на впровадження об'єктивних вимірювань телерентгенограм в бічній проекції, щоб скласти план лікування та оцінити результати лікування [1,5,2,7].…”

Section: вступunclassified

Correlations Between Skeletal Angular Indicators of the Jaws, Characteristics of Incisal Position and Profile of Soft Facial Tissues in Orthodontic Patients

Korobov¹,

Kuroiedova²,

Vyzhenko³

et al. 2022

Act. Probl. of the Modern Med.

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Assessment of a face in profile is an integral part of a complete orthodontic diagnosis. The degree of labial inclination of the axes of the incisal crowns in relation to cephalometric and facial indicators are particularly important elements in orthodontic treatment in order to achieve an aesthetic and natural appearance of the face. The purpose of this study is to establish the peculiarities of the correlations between the skeletal angular parameters of the jaws, the characteristics of the incisal position, and the profile of the soft facial tissues of orthodontic patients. Participants and methods. Using the Veraviewepocs 3D device, Morita (Japan), 60 patients (29 men (48.3%) and 31 women (51.7%) with various occlusal pathologies aged from 11 to 39 years underwent teleradiograms. Using the licensed program for cephalometric analysis "Audax Ceph 6.0", the following indicators were analyzed: skeletal sagittal angles SNA, SNB, ANB. Skeletal vertical angles: NL-NSL, ML-NSL, NL-ML. Dento-alveolar parameters: +1/NL, +1/NA, -1/ML, -1/NB, +1/-1. Cephalometric indicators of soft tissues and facial profile: Gl'Sn'Pog', Nasolabial angle, Ls'-E-line, Li'-E-line. Correlations were evaluated in the IBM SPSS Statistics 23 license package using Spearman's non-parametric statistics. Results and discussion. Both men and women show that the ANB angle has the largest number of correlations with dental and profilometric indicators. In both cases, the angle ANB has the highest degree of correlation with the face profile angle Gl'Sn'Pog'. In men, the level of significance of ANB to Gl'Sn'Pog' is (r=-0.796, p=0.000), for women this index is r=-0.771, p=0.000. This indicates a significant influence of skeletal pathology on the type of the profile and facial aesthetics.

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Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study

Cited by 15 publications

References 28 publications

Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study

Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study

Efficacy and safety of piezocision in accelerating maxillary anterior teeth en-masse retraction: study protocol for a randomized controlled trial

Correlations Between Skeletal Angular Indicators of the Jaws, Characteristics of Incisal Position and Profile of Soft Facial Tissues in Orthodontic Patients

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