Measurement of three-dimensional perioral soft tissue changes in dentoalveolar protrusion patients after orthodontic treatment using a structured light scanner

Ahn, Hyo‐Won; Chang, Ye-Jin; Kim, Kyung‐A; Sang-Hwan, Joo; Park, Young-Guk; Park, Ki Ho

doi:10.2319/112913-877.1

Cited by 35 publications

(30 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To minimize the influence of sex on soft tissue changes following the incisor movement, only female patients were included in this study. Some studies have reported that the ratio between lip change and incisor retraction ranged from 1:0.45 to 1.25 for the upper lip, and from 1:1.2 to 1:6.2 for the lower lip in nongrowing patients with bimaxillary protrusion [19,20]. In addition to the changes of lip position, the incisor retraction could also induce soft tissue thickness changes [19,21].…”

Section: Discussionmentioning

confidence: 99%

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

Zhang

et al. 2020

BMC Oral Health

View full text Add to dashboard Cite

Background: To investigate the area and morphological changes around the soft tissue chin after orthodontic incisor retraction. Methods: Fifty-nine female adults with bimaxillary protrusion requiring extraction of four premolars were included in the study. Cephalograms were taken before (T0) and after (T1) orthodontic treatment. The soft tissue changes, including the area, thickness and morphology were measured. Paired-t tests were performed for statistical comparisons. Pearson correlation analyses and backward multivariate regression analyses were used to identify the relationship between the soft tissue changes and incisor retraction. Results: Following the incisor retractions (5.35 ± 1.79 mm and 4.42 ± 1.62 mm for the upper and lower, respectively), there was a significant increase in the soft tissue thickness of L1c-LL (0.64 ± 1.67 mm, P = 0.025) and Pog-Pog' (0.44 ± 1.10 mm, P = 0.022), and a significant decrease in the soft tissue thickness of B-B′ (1.21 ± 1.34 mm, P < 0.01). Changes in the area of soft tissue chin and lower lip were not statistically significant (P > 0.05). Pearson coefficient between the thickness changes of B-B′ and the retraction of lower incisors was − 0.376. The multiple correlations between the soft tissue thickness changes and incisor retractions were Y = 1.02-0.42a + 0.42b for L1c-LL, and Y = 0.17-0.31b for B-B′. Conclusions:The orthodontic incisor retraction could cause soft tissue thickness changes (i.e. an increase in L1c-LL and Pog-Pog' and a decrease in B-B′) without area changes.

show abstract

Section: Discussionmentioning

confidence: 99%

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

Zhang

et al. 2020

BMC Oral Health

View full text Add to dashboard Cite

show abstract

“…The origin (point 0, 0, 0) was set at soft tissue nasion. 9 The x-axis (left-right/transverse) was defined as the plane connecting right and left pupil points. 19 The y-axis (up-down/vertical) was defined as the plane formed by the perpendicular bisector of the segment connecting right and left pupil points.…”

Section: Image Analysismentioning

confidence: 99%

“…8 This is an important limitation, because incisor movement can also induce lip changes lateral to the midline. 9 Stereophotogrammetry is a 3D surface imaging technique that compares multiple photographs from various angles to construct a 3D model of the surface. 10 It is quick, non-invasive, 10 accurate, and reliable.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Analysis of Lip Changes in Response To Simulated Maxillary Incisor Advancement

Au¹,

Li²,

Bennani³

et al. 2019

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To assess the immediate response of lips in three dimensions (3D) resulting from simulated maxillary incisor advancement. Materials and Methods: Incremental maxillary incisor advancement was simulated by placing wax of increasing thickness (+2 mm, +4 mm, +6 mm) on the incisors of 20 participants, and the induced lip changes were recorded using 3D stereophotogrammetry. The induced displacement of lip landmarks was quantified using 3D image analysis software. Data were analyzed using a repeated-measures analysis of variance (ANOVA) after adjusting for age and sex of the study participants. Results: A large interindividual variation in lip response to simulated incisor advancement was observed. A significant overall effect on 3D lip changes was found for increasing values of simulated incisor advancement (F = 13.2; P < .001) as well as significant differences between anatomical landmarks of the lip (F = 7.4; P < .01). Most points moved outward and anterosuperiorly, except the midpoint and corners of the lip. Greatest movement was observed in the sagittal plane, followed by the vertical and transverse planes. Conclusions: Maxillary incisor advancement significantly affects upper lip change in three planes of space: particularly the anteroposterior plane, in which the response to simulated advancement appears to be nonlinear.

show abstract

“…To achieve these goals, it is necessary to create a balance between the soft and hard tissues, including the nose, lips, and jaw, and it is important to consider variability among individuals. 1 Among the facial soft tissue changes resulting from orthodontic treatment, there is particular interest in changes in the position and contour of the lips, and various methods of predicting posttreatment soft tissue changes have been reported to establish a diagnosis and treatment plan. [2][3][4][5] Choi et al 2 reported that in adult female patients with Class II Division 1 malocclusion, the ratios of movement between labrale superioris (Ls) and labrale inferioris (Li) to the extent of anterior teeth retraction are 1:0.45 and 1:2.08, respectively, and that the amount of posterior movement of Ls is correlated with posterior movement of the maxillary incisal edge.…”

Section: Introductionmentioning

confidence: 99%

Unpredictability of soft tissue changes after camouflage treatment of Class II division 1 malocclusion with maximum anterior retraction using miniscrews

Kim

Choi

et al. 2016

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To compare soft and hard tissue responses based on the degree of maxillary incisor retraction using maximum anchorage in patients with Class II division 1 malocclusion. Materials and Methods: This retrospective study sample was divided into moderate retraction (,8.0 mm; n ¼ 28) and maximum retraction (!8.0 mm; n ¼ 29) groups based on the amount of maxillary incisor retraction after extraction of the maxillary and mandibular first premolars for camouflage treatment. Pre-and posttreatment lateral cephalograms were analyzed. Results: There were 2.3 mm and 3.0 mm of upper and lower lip retraction, respectively, in the moderate group; and 4.0 mm and 5.3 mm, respectively, in the maximum group. In the moderate group, the upper lip was most influenced by posterior movement of the cervical point of the maxillary incisor (b ¼ 0.94). The lower lip was most influenced by posterior movement of B-point (b ¼ 0.84) and the cervical point of the mandibular incisor (b ¼ 0.83). Prediction was difficult in the maximum group; no variable showed a significant influence on upper lip changes. The lower lip was highly influenced by posterior movement of the cervical point of the maxillary incisor (b ¼ 0.50), but this correlation was weak in the maximum group. Conclusions: Posterior movement of the cervical point of the anterior teeth is necessary for increased lip retraction. However, periodic evaluation of the lip profile is needed during maximum retraction of the anterior teeth because of limitations in predicting soft tissue responses. (Angle Orthod. 2017;87:230-238)

show abstract

Measurement of three-dimensional perioral soft tissue changes in dentoalveolar protrusion patients after orthodontic treatment using a structured light scanner

Cited by 35 publications

References 20 publications

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

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

Three-dimensional Analysis of Lip Changes in Response To Simulated Maxillary Incisor Advancement

Unpredictability of soft tissue changes after camouflage treatment of Class II division 1 malocclusion with maximum anterior retraction using miniscrews

Contact Info

Product

Resources

About