Assessment of lower lip changes following incisor displacement in 92 orthodontically-treated adults

Mirabella, Davide; Quartarone, Luigi; Lombardo, Luca; Guarneri, Antonio; Guarneri, Maria-Paola

doi:10.1016/j.ortho.2012.06.011

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…For frontal aspects, most phenotypes underwent minimal changes before and after orthodontics. Speci cally, sto.sm/sn.gn experienced changes and was correlated with aesthetic ratings, indicating that the proportion of the lower lip and lower third of the face is a crucial factor in frontal aesthetics, consistent with previous literature [24,25].…”

Section: Discussionsupporting

confidence: 88%

Impact of Orthodontic-Induced Facial Morphology Changes on Aesthetic Evaluation: A Retrospective Study

Liu,

Du,

Wang

et al. 2023

Preprint

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Background The profound influence of orthodontic interventions on facial aesthetics has been a topic of increasing interest. This study delves into the intricate interplay between orthodontic treatments, quantified facial feature alterations, and aesthetic perceptions. Methods A comprehensive cohort of clinical images capturing pre- and post-orthodontic treatment stages was meticulously curated, encompassing a sample size of N = 73. Employing advanced phenotypic grouping techniques, facial landmarks were meticulously identified, providing a nuanced understanding of facial changes. The subsequent aesthetic assessments, executed by a panel of experts, underwent rigorous statistical analyses to unveil the correlations between orthodontic modalities, facial feature transformations, and aesthetic appraisals. Results Notably robust consensus emerged among expert evaluators regarding facial aesthetic judgments, showcasing the highest consistency in lateral views. Intriguingly, orthodontic interventions yielded a substantial elevation in overall aesthetic ratings, with lateral and comprehensive evaluations particularly underscored. Among the subjects subjected to premolar extraction, a significantly more pronounced enhancement in aesthetic outcomes was evident. Distinct facial landmarks, such as pg.sm.hori and pg.n.ls, exhibited substantive alterations that demonstrated significant associations with heightened aesthetic evaluations. Moreover, a comprehensive multifactor analysis underscored the sustained significance of pg.sm.hori, positioning it as a pivotal factor influencing aesthetic outcomes within orthodontic practices. Conclusions This exhaustive study provides a comprehensive exploration of the intricate relationship between orthodontic interventions and facial aesthetics, capitalizing on the amalgamation of clinical images and expert judgments. The findings not only underscore the substantial impact of orthodontic treatments, particularly from lateral perspectives, but also emphasize the pivotal role of specific facial landmarks like pg.sm.hori and pg.n.ls in achieving augmented aesthetic results. These insights not only enrich the clinical decision-making process but also pave the way for further research endeavors aimed at unraveling the complex tapestry of facial aesthetics within the realm of orthodontics.

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Section: Discussionsupporting

confidence: 88%

Impact of Orthodontic-Induced Facial Morphology Changes on Aesthetic Evaluation: A Retrospective Study

Liu,

Du,

Wang

et al. 2023

Preprint

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“…When analyzing the results obtained, the wide variability between the three clinical cases presented is perceptible, which is similar to what was obtained in a study carried out by Mirabella and Bacconi 11 in 2008, who highlighted a marked diversity of results which did not allow the possibility of making a prediction with pressure regarding possible changes in soft tissue.…”

Section: Discussionsupporting

confidence: 80%

“…The facial balance and harmony are determined by the interrelation of various factors such as skeletal and soft tissue characteristics, as well as the position and inclination characteristics of the incisors. There are studies that directly relate the effect of orthodontic treatment with the position of the lips as a result of variations in position and inclination of the incisors 7 , 11 .…”

Section: Discussionmentioning

confidence: 99%

Changes in the position and inclination of the upper incisor and upper lip postorthodontic treatment: case reports

Chacón Moreno,

Huasco Huarcaya

2023

Rev Cient Odontol (Lima)

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Objective: To determine the changes in the position and inclination of the upper incisor and upper lip after orthodontic treatment in a series of 3 clinical cases. Materials and Methods: The three reported clinical cases correspond to adult patients who were treated with fixed orthodontics and premolar extractions. Measurements of upper incisor position (UIP), upper incisor inclination (UII), upper lip position (ULP), and upper lip inclination (ULI) were performed on pre-treatment and post-treatment cephalometric radiographs for assessment of changes. Results: In the first case a variation of -1 mm was found for both the UIP and the ULP, as well as a variation of the UII and the ULI, although in different magnitude. Case 2 presented a 2 mm variation in the UII with minimal changes in the upper lip (Δ ULP = 0 mm and Δ ULI =-0.5 mm) and in case 3 a 2 mm variation was obtained for both IIS and ILS. Conclusions: The results obtained in this case reports show us a wide variability, so it is impossible to accurately predict changes in soft tissues as a response to tooth movement. Clinical significance: Predicting tooth movement changes in soft tissues is critical during the initial planning phase of orthodontic treatment.

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“…This is in agreement with the Singh and Kasai study, in which the authors argued that incisor repositioning has no direct effect on the chin covering tissues, but it would act to promote growth, which explains the increase in recorded thickness improving facial esthetics 14 . Mirabella et al 20 estimated that a greater initial thickness of the lips would act as a shock absorber or brake as a result of the movement of the incisors.…”

Section: Discussion and Recommendationsmentioning

confidence: 99%

Do orthodontic extractions have an impact on the cutaneous profile?

Dallel

Megdiche

Ghedira

et al. 2018

J Dentofacial Anom Orthod

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Orthodontic treatments can have an impact on the soft tissues and more particularly on the cutaneous profile. The aim of this work was to evaluate profile changes following orthodontic treatment. Material and methods: This study concerned 90 patients randomly selected in the orthodontic department of Monastir (Tunisia). Profile headfilms at the start and at the end of orthodontic treatment were compared using, as reference lines, the SN-7° plane and the orthogonal to SN-7° plane going through the S-point (POSN- 7°). The Student test was applied to evaluate the variations in the cephalometric measurements. The Pearson test was used to study the correlation between the horizontal tooth movements and facial profile changes. Results: We noted a significant decrease in the upper labral (Ls) (p=0.049) and lower labral (p=0.048) as well as a significant increase in the labio-mental angle (p=0.025) in patients treated with extractions of premolars. A positive correlation between the incisor movements and the reduction of the labial protrusion was observed. Conclusion: The results of this study have shown that the movements of the incisors consecutive to extractions can have tangible effects on the cutaneous profile. Further investigations should be carried out to highlight the relationship between tooth movement and soft tissue.

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Assessment of lower lip changes following incisor displacement in 92 orthodontically-treated adults

Cited by 6 publications

References 26 publications

Impact of Orthodontic-Induced Facial Morphology Changes on Aesthetic Evaluation: A Retrospective Study

Impact of Orthodontic-Induced Facial Morphology Changes on Aesthetic Evaluation: A Retrospective Study

Changes in the position and inclination of the upper incisor and upper lip postorthodontic treatment: case reports

Do orthodontic extractions have an impact on the cutaneous profile?

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