scholarly journals Three-dimensional evaluation of mid-facial soft tissue changes after expansion using micro-implant-supported maxillary skeletal expander

2020 ◽  
Author(s):  
Hieu Nguyen ◽  
Jeong Won Shin ◽  
Hai-Van Giap ◽  
Ki Beom Kim ◽  
Hwa Sung Chae ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Computerized Tomography ◽  
Soft Tissues ◽  
Cone Beam ◽  
Maxillary Expansion ◽  
Hard Tissue ◽  
Facial Soft Tissue ◽  
Tissue Changes ◽  
Cone Beam Computerized Tomography ◽  
Soft Tissue Changes

Abstract Background The aim of this study was to assess the mid-facial soft tissue changes induced by a micro-implant-supported maxillary skeletal expander in late adolescents and young adults by cone-beam computerized tomography and the correlations between hard and soft tissue changes after expansion with maxillary skeletal expander.Subjects and methods Twenty patients with maxillary transverse deficiency treated with maxillary skeletal expander were selected. Cone-beam computerized tomography images taken before and after expansion were superimposed to measure the changes in soft and hard tissue landmarks.Results Anterior nasal spine, posterior nasal spine, and alveolar bone width were significantly increased after expansion with maxillary skeletal expander (p < 0.05). The average lateral movement of the cheek points was 1.13 ± 0.33 mm (left) and 1.41 ± 0.39 mm (right), while that of the alar curvature points was 1.07 ± 0.72 mm (left) and 1.06 ± 0.68 (right) (p < 0.05). The average forward displacement of the cheek points was 0.42 ± 0.66 mm (left) and 0.60 ± 0.58 mm (right), whereas that of the alar curvature points was 0.80 ± 0.67 mm (left) and 0.68 ± 0.56 mm (right) side (p < 0.05). The average downward movement of the subnasale was 0.40 ± 0.37 mm (p < 0.05). The changes in cheek points and alar curvature points on both sides significantly correlated with hard-tissue changes (p < 0.05).Conclusions Maxillary expansion using maxillary skeletal expander resulted in significant lateral and forward movement of soft tissues of the cheek and alar curvature points on both sides and correlated with the maxillary suture opening at the anterior and posterior nasal spines.

scholarly journals Soft tissue changes after anterior maxillary osteotomy by using 3D CBCT scanning.

2018 ◽  
Vol 4 (4) ◽  
pp. 1245-1250 ◽  
Author(s):  
Ahmed AL-Omar ◽  
Usama AL-Dakroroy
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Cone Beam Computed Tomography ◽  
Soft Tissues ◽  
Mean Value ◽  
Cone Beam ◽  
Maxillary Osteotomy ◽  
Tissue Changes ◽  
The Mean ◽  
Soft Tissue Changes

The objective of this study was to evaluate the soft tissue changes after anterior maxillary osteotomy using cone beam computed tomography. The study included twelve patients diagnosed as suffering from an excess of the anterior part of maxilla and required surgical correction by anterior maxillary osteotomy. Assessment of Cone beam computed tomography in evaluation the soft tissue changes. All cases subjected to anterior maxillary osteotomy using modified Cuper technique. Follow up of cases was does clinically and radio- graphically by cone beam computed tomography. The results of the study proved that the statistically significant increase in mean Nasolabial angle after 6 months was 5.2 degrees, the mean value of nasal width after 6 months was 0,9mm. The mean value of Philtrum length was 3.3mm. In conclusion, Cone Beam Computed Tomography can be used to obtain dimensionally accurate linear and angular measurement from bony maxillofacial structure and landmarks and allows accurate, three-dimensional imaging of hard and soft tissues.

scholarly journals Evaluation of the Soft Tissue Changes after Rapid Maxillary Expansion Using a Handheld Three-Dimensional Scanner: A Prospective Study

2021 ◽  
Vol 18 (7) ◽  
pp. 3379
Author(s):  
Ali Alkhayer ◽  
Roland Becsei ◽  
László Hegedűs ◽  
László Párkányi ◽  
József Piffkó ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Prospective Study ◽  
Morphological Changes ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Facial Soft Tissue ◽  
Retention Period ◽  
The Face ◽  
Tissue Changes ◽  
Soft Tissue Changes

Facial soft tissue esthetics is a priority in orthodontic treatment, and emerging of the digital technologies can offer new methods to help the orthodontist toward an esthetic outcome. This prospective study aimed to assess the soft tissue changes of the face after six months of retention following Rapid Maxillary Expansion (RME). The sample consisted of 25 patients (13 females, 12 males, mean age: 11.6 years) who presented with unilateral or bilateral posterior crossbite requiring RME, which was performed with a Hyrax expander. 3D facial images were obtained before treatment (T0) and at the end of a six-month retention period after the treatment (T1) using a structured-light 3D handheld scanner. Linear and angular measurements were performed and 3D deviation analyses were done for six morphological regions of the face. Significant changes in various areas of the nasal and the upper lip regions were observed. Based on the results of the study and within the limitations of the study, RME with a Hyrax expander results in significant morphological changes of the face after a six-month retention period.

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 The effect of head posture on facial soft tissue changes captured by white-light facial scanning

2021 ◽  
Vol 35 (2) ◽  
pp. 134-142
Author(s):  
Jae-Beom Lim ◽  
Seung-Wook Oh ◽  
Hyun-joon An ◽  
Tae-Joon Park ◽  
Tae-Hee Lee ◽  
...  
Keyword(s):  
Soft Tissue ◽  
White Light ◽  
Facial Soft Tissue ◽  
Head Posture ◽  
Tissue Changes ◽  
Soft Tissue Changes ◽  
Facial Scanning

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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