scholarly journals Three-Dimensional Evaluation of Soft Tissue Changes after Functional Therapy

Scanning ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Ersin Yıldırım ◽  
Şeniz Karaçay ◽  
Dilek Tekin
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Female Participant ◽  
Functional Therapy ◽  
Lower Lip ◽  
Color Mapping ◽  
Soft Tissue Profile ◽  
Tissue Changes ◽  
Soft Tissue Changes ◽  
Mandibular Retrognathia

This study was aimed at proposing a three-dimensional (3D) evaluation method for the soft tissue effects of Twin Block (TB) functional appliance therapy by using cone beam computed tomography (CBCT) images. In this retrospective study, a total of 60 pre- and posttreatment (T0 and T1) CBCT images of Class II patients with mandibular retrognathia treated with a TB appliance were used. Volumetric and linear soft tissue changes were evaluated quantitatively with 3D measurements and qualitatively with color mapping visual. Linear (NV-A and NV-Pog) and angular (SNA, SNB, and ANB) skeletal changes were also measured on 3D images. The Wilcoxon signed-rank test was used to compare statistical differences, and the scores of male and female participant differences were observed with the Mann–Whitney U test. In this study, a decrease was observed in SNA ( p < 0.05 ), ANB ( p < 0.01 ), and NV-Pog ( p < 0.05 ) while an increase in SNB ( p < 0.01 ) was found. However, decrease in NV-A distance was not statistically significant ( p > 0.05 ). As a result of the evaluation of soft tissue changes, while the anterior reposition of the lower lip, soft tissue pogonion, and soft tissue gnathion was found to be significant ( p < 0.01 , p < 0.01 , and p < 0.05 , respectively), the upper lip and subnasale repositions were not statistically significant ( p > 0.05 ). 3D soft tissue changes after TB therapy can be evaluated quantitatively and qualitatively by using CBCT images. Anterior repositioning of the mandible with functional therapy also provides improvement in soft tissue profile, especially in the lower facial region.

scholarly journals Evaluation of soft tissue changes around the lips after bracket debonding using three-dimensional stereophotogrammetry

2015 ◽  
Vol 85 (5) ◽  
pp. 833-840 ◽  
Author(s):  
Young-Kyun Kim ◽  
Nam-Ki Lee ◽  
Sang-Woon Moon ◽  
Moon-Jung Jang ◽  
Hyun-Suk Kim ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Facial Soft Tissue ◽  
Orthodontic Bracket ◽  
Lower Lip ◽  
Before And After ◽  
Tissue Changes ◽  
Orthodontic Patients ◽  
Soft Tissue Changes ◽  
Facial Images

ABSTRACT Objective:  To evaluate the changes in soft tissue around the lips after orthodontic bracket debonding using three-dimensional (3-D) stereophotogrammetry. Materials and Methods:  3-D facial images of 20 subjects (10 men and 10 women; mean age, 26.81 ± 7.23 years) were taken with a white light scanner before and after debonding the labial brackets. Two images acquired from each subject were superimposed, and 15 soft tissue landmarks around the lips were plotted and analyzed. Statistical analysis was performed using both paired and independent t-tests (P &lt; .05). Results:  There were no significant changes in position of any landmark on the x (left-right)- or y (vertical)-axes after removal of the brackets. However, the landmarks in the oral commissures and lower lip (LLP, −0.55 mm; Li, −0.44 mm; Ch-L, −0.56 mm, all P &lt; .05) on the z (anteroposterior)-axis showed statistically significant differences. There were no significant positional changes of most landmarks on the x-, y-, or z- axes after bracket removal among the various genders and lip thicknesses. Conclusions:  There was a slight retrusion in the oral commissure and lower lip areas after debonding, but no changes were found in the upper lip area. This study showed that 3-D stereophotogrammetry can be useful in evaluating facial soft tissue changes in orthodontic patients.

scholarly journals Soft Tissue Changes after Orthognathic Surgery: A Study

2011 ◽  
Vol 1 (1) ◽  
pp. 47-51 ◽  
Author(s):  
Chandran Upadhyaya ◽  
Mohan Baliga ◽  
Premalatha Shetty
Keyword(s):  
Soft Tissue ◽  
Orthognathic Surgery ◽  
Hard Tissue ◽  
Facial Soft Tissue ◽  
Lower Lip ◽  
Maxillary Osteotomy ◽  
Alar Base ◽  
Soft Tissue Profile ◽  
Tissue Changes ◽  
Soft Tissue Changes

Aim and objective: The main aim and objectives of this study was to determine the changes in the facial soft tissue profile following orthognathic surgery, to evaluate eventual treatment effects on stability of facial aesthetics and degree of predictability of these changes. Materials and method: 15 numbers of patients underwent with le fort I, anterior maxillary osteotomy, genioplasty and bimaxillary surgery. The alar base cinch suture and the V-Y closure techniques were used in each maxillary procedure. The criteria applied included an average follow-up of 6 months post-operatively. Results: In this study preoperative and postoperative cephalometric tracing were compared to analyze the soft tissue profile changes in relation to hard tissue changes in both upper and lower lip and chin regions after double jaw surgery. Only horizontal changes were analyzed for which an X-Y coordinate system was used. The upper lip responded variably to the direction and amount of maxillary positioning. The predictability and the significance of changes of soft tissue in relation to hard tissue are variable as it reaches towards the nose. Conclusion: It is important for the clinician to realize that numerous factors of variability exist so that he can understand that the soft-tissue profile will sometimes deviate quite markedly from what is expected, in spite of careful planning.

scholarly journals Three‐dimensional soft tissue changes in orthodontic extraction and non‐extraction patients: a prospective study

2021 ◽  
Author(s):  
Roberto Rongo ◽  
Line Nissen ◽  
Cécile Leroy ◽  
Ambrosina Michelotti ◽  
Paolo M. Cattaneo ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Prospective Study ◽  
Three Dimensional ◽  
Tissue Changes ◽  
Soft Tissue Changes ◽  
A Prospective Study

scholarly journals A Perioral Soft Tissue evaluation after Orthognathic Surgery Using Three-Dimensional Computed Tomography Scan

2018 ◽  
Vol 12 (1) ◽  
pp. 366-376
Author(s):  
Rahul Tiwari ◽  
P. Srinivas Chakravarthi ◽  
Vivekanand S. Kattimani ◽  
Krishna Prasad Lingamaneni
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Orthognathic Surgery ◽  
Soft Tissues ◽  
Three Dimensional ◽  
Computed Tomography Scan ◽  
Nasolabial Angle ◽  
Tissue Changes ◽  
Soft Tissue Changes ◽  
Tomography Scan

Background: Facial appearance is an important factor, affects social and psychological well-being. The ideal positioning of jaws and soft tissues is crucial during orthognathic surgery for a better outcome, but the response of facial soft tissues does not always reflect the exact movements of the underlying jaws in 1:1 ratio. So, soft tissue changes following orthognathic surgery require utmost attention during surgical correction to make successful treatment. Aims and Objectives: Evaluation of perioral soft tissue changes after orthognathic surgical procedures. The objectives of the study were to assess and compare pre and post-operative perioral soft tissue changes of lip width, nasolabial and mentolabial angle using Three Dimensional Computed Tomography scan (3DCT). Patient and Methods: The study involved ten patients for evaluation requiring orthognathic surgical procedures (maxillary or mandibular anteroposterior excess or deficiency, transverse deformities, vertical maxillary excess and facial asymmetry) presented to the department of oral and maxillofacial surgery during 2014-2016. Pre and post-operative 3DCT scan were taken after 12 months using iCT 256 slice whole body CT scanner and evaluated for changes using Dicom PMS D view. Results: Significant changes were observed in nasolabial angle after maxillary advancement (1.81°) and maxillary setback procedure (2.73°). The mentolabial angle was significantly increased with mandibular setback procedures (3.27°). Mandibular advancement procedures showed both increase (3.6°) and decrease (7.6°) in mentolabial angle. Conclusion: 3DCT showed a significant difference in perioral soft tissue changes in nasolabial and mentolabial angle but no significant change was observed in lip width. 3DCT is a reliable tool for 3D assessment. The conventional thought of changes in Nasolabial angle after surgery is changing due to the underlying factors which should be considered for prediction.

Three-Dimensional Analysis Techniques—Part 1: Three-Dimensional Soft-Tissue Analysis of 24 Adult Cleft Palate Patients following Le Fort I Maxillary Advancement: A Preliminary Report

1997 ◽  
Vol 34 (1) ◽  
pp. 36-45 ◽  
Author(s):  
Andrew M. Mccance ◽  
James P. Moss ◽  
W. Rick Fright ◽  
Alf D. Linney ◽  
David R. James
Keyword(s):  
Soft Tissue ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Tissue Analysis ◽  
Facial Soft Tissue ◽  
Le Fort ◽  
Analysis Techniques ◽  
Tissue Changes ◽  
Soft Tissue Changes ◽  
Le Fort I

The three-dimensional, facial soft-tissue changes of 24 patients with various cleft types following transpalatal Le Fort I osteotomy were measured using laser scanning techniques, radial measurements, and a color millimetric scale. There was a varying degree of midface retrusion in the different cleft groups, and a very similar pattern of retrusion over the nasal complex. Each group of patients showed a varying degree of relapse postsurgically, but there was a failure in all the cleft groups to correct the lack of nasal projection.

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