scholarly journals Three-Dimensional Evaluation of Soft Tissues in Hyperdivergent Skeletal Class II Females in Guangdong

2021 ◽  
Author(s):  
Xueqin Zhang ◽  
Jianqing Deng ◽  
Zhaoxiang Wen ◽  
Zhengyuan Chen ◽  
Liyi Gan ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Class Ii ◽  
Hard Tissue ◽  
Facial Soft Tissue ◽  
Linear Measurements ◽  
Skeletal Class ◽  
Adult Females ◽  
Skeletal Class Ii

Abstract Background: To establish the three-dimensional facial soft tissue morphology of adolescent and adult females in the Guangdong ethnic group and to study the morphological characteristics of hyperdivergent skeletal class Ⅱ females in Guangdong compared with the characteristics of normal groups.Materials and Methods: The 3dMDface system was used to capture face scans of 160 patients, including 45 normal and 35 hyperdivergent skeletal class II adolescents (aged 11–14 years old) and 45 normal and 35 hyperdivergent skeletal class II adults (aged 18–30 years old). Thirty-two soft tissue landmarks were mapped, and 21 linear, 10 angular and 17 ratio measurements were obtained by 3dMDvultus analysis software. Data were assessed with a t-test of two independent samples between the normal adolescent and adult groups and between the normal and hyperdivergent skeletal class II groups.Results: The linear measurements of the Guangdong adult females were larger than those of the adolescents. However, the angular and ratio measurements had little difference. The vertical linear measurements were higher and the sagittal and transverse linear measurements were smaller in the hyperdivergent class II group (p<0.05). The soft tissue ANB angle, chin-lip angle, and mandibular angle were significantly larger and the soft tissue facial convexity angle and nasal convexity angle were significantly smaller in the hyperdivergent class II group (p<0.05). Additionally, there were significant differences in the ratio measurements between the hyperdivergent class II groups and the control groups (p<0.05).Conclusions: The three-dimensional facial morphology of Guangdong adolescent and adult females was acquired. The facial soft tissue measurements of the adults were higher in height, width and depth, suggesting that from the adolescent to adult period, facial soft tissue grows in three dimensions. However, the facial convexity and proportional relationships were similar, suggesting that the growth pattern remained the same. The three-dimensional facial soft tissue features of hyperdivergent skeletal class II were characterized by the terms “long, convex, and narrow”, which was similar to the hard tissue features of hyperdivergent skeletal class II seen in previous studies. Three-dimensional facial measurements can reflect intrinsic hard tissue characteristics.

scholarly journals Analysis of Three-Dimensional Morphological Differences in the Mandible between Skeletal Class I and Class II with CBCT Fixed-Point Measurement Method

Scanning ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Qiang Dong ◽  
HaoYu Shi ◽  
Qi Jia ◽  
Yueyi Tian ◽  
Keqian Zhi ◽  
...  
Keyword(s):  
Anterior Part ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Vertical Direction ◽  
Class Ii ◽  
Class I ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Mandibular Body

This study was aimed at determining the three-dimensional differences in the mandible morphology between skeletal class I and II patients, at exploring the pathogenic mechanisms and morphological characteristics of skeletal class II, and at providing clinical references. The subjects were assigned to two groups according to the size of ANB angle: skeletal class I ( 2 ° < ANB   angle < 5 ° ) and skeletal class II ( 5 ° < ANB   angle < 8 ° ). After cone-beam computed tomography (CBCT) scanning, 31 landmarks and 25 measurement items were determined by In Vivo Dental 5.1 software (Anatomage, CA) for statistical analysis. The results were as follows: Co-Go, Go-Me, and CdM-CdD in skeletal class II cases were smaller than those in skeletal class I, and GoR-Me-GoL, GoR-Me-CoL, and, Ig-Men were larger than those in skeletal class I cases. In conclusion, there were significant differences in the three-dimensional morphology of the mandible between skeletal class I and class II patients. The vertical growth of the ramus, the horizontal growth of the mandibular body, and the condyle in skeletal class II patients were smaller than those in skeletal class I cases. In skeletal class II, the growth of the anterior part of the mandible in the vertical direction was larger than that in skeletal class I, and the shape of the mandible was more extended.

scholarly journals Nonsurgical and nonprosthetic camouflage treatment of skeletal Class II open bite with bilaterally missing lower first molars

2018 ◽  
Vol 89 (3) ◽  
pp. 505-517. ◽  
Author(s):  
Tung Nguyen ◽  
Eui Seon Baek ◽  
Soonshin Hwang ◽  
Kyung-Ho Kim ◽  
Chooryung J. Chung
Keyword(s):  
Treatment Outcome ◽  
Three Dimensional ◽  
Class Ii ◽  
Open Bite ◽  
Third Molars ◽  
Second Molar ◽  
Skeletal Class ◽  
Long Term Stability ◽  
Skeletal Class Ii

ABSTRACT This report illustrates the successful nonsurgical and nonprosthetic camouflage treatment of a skeletal Class II open bite malocclusion combined with missing mandibular first molars bilaterally. In the mandible, the second and third molars were uprighted and protracted, substituting for the missing first molars. In the maxilla, anterior bodily retraction and full-arch intrusion were achieved following premolar and second molar extraction, which also induced autorotation of the mandible. The treatment outcome and prognosis were confirmed with three-dimensional superimposition techniques, along with long-term stability.

scholarly journals Three-dimensional effects of the mini-implant–anchored Forsus Fatigue Resistant Device: A randomized controlled trial

2015 ◽  
Vol 86 (2) ◽  
pp. 292-305 ◽  
Author(s):  
Sherif A. Elkordy ◽  
Amr M. Abouelezz ◽  
Mona M. Salah Fayed ◽  
Khaled H. Attia ◽  
Ramy Abdul Rahman Ishaq ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Three Dimensional ◽  
Class Ii ◽  
Control Group ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Skeletal Effects ◽  
Implant Anchorage ◽  
Mandibular Incisors ◽  
Forsus Fatigue Resistant Device

ABSTRACT Objective:  To detect three-dimensionally the effects of using mini-implant anchorage with the Forsus Fatigue Resistant Device (FFRD). Materials and Methods:  The sample comprised 43 skeletal Class II females with deficient mandibles. They were randomly allocated into three groups: 16 patients (13.25 ± 1.12 years) received FFRD alone (Forsus group), 15 subjects (13.07 ± 1.41 years) received FFRD and mini-implants (FMI group), and 12 subjects (12.71 ± 1.44 years) were in the untreated control group. Three-dimensional analyses of cone beam computed tomographic images were completed, and the data were statistically analyzed. Results:  Class I relationship and overjet correction were achieved in 88% of the cases. None of the two treatment groups showed significant mandibular skeletal effects. In the FMI group, significant headgear effect, decrease in maxillary width, and increase in the lower facial height were noted. In the FMI group, retroclination of maxillary incisors and distalization of maxillary molars were significantly higher. Proclination and intrusion of mandibular incisors were significantly greater in the Forsus group. Conclusions:  FFRD resulted in Class II correction mainly through dentoalveolar effects and with minimal skeletal effects. Utilization of mini-implant anchorage effectively reduced the unfavorable proclination and intrusion of mandibular incisors but did not produce additional skeletal effects.

scholarly journals Modifications of Midfacial Soft-Tissue Thickness Among Different Skeletal Classes in Italian Children

2018 ◽  
Vol 10 (1) ◽  
pp. 1-8
Author(s):  
Daniele Gibelli ◽  
Matteo Zago ◽  
Annalisa Cappella ◽  
Claudia Dolci ◽  
Chiarella Sforza
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Class Ii ◽  
Class Iii ◽  
Tissue Thickness ◽  
Facial Soft Tissue ◽  
Skeletal Class ◽  
Soft Tissue Thickness ◽  
Italian Children ◽  
The Relationship

Background: The anatomical assessment of the arrangement of facial soft tissues has important applications in different fields from orthodontics to plastic surgery. One of the issues concerns the relationship between facial soft tissue thickness and skeletal class. Literature mainly deals with adult populations, whereas very few studies have been focused on children. Objective: This study aims at investigating the relationship between midline facial soft tissue thickness and skeletal classes in Italian pre-treatment orthodontic child patients. Methods: Lateral cephalometric X-ray films were obtained from 220 healthy Caucasoid children (91 males and 129 females), aged between 6 and 18 years (Class I: 41 males and 70 females; Class II: 18 males and 25 females; Class III: 32 males and 34 females). All the films were digitized and 14 soft tissue thicknesses were measured on the midface; in addition, the skeletal class was assessed according to the corrected ANB angle (ANBc). Differences in facial soft tissue thickness according to sex and skeletal class were assessed through two-way ANOVA test (p<0.01). Results: Statistically significant differences according to sex were found for labrale superius, stomion and labrale inferius, with thicker soft tissues in males than in females (p<0.01). Only measurements at labrale superius and gnathion showed statistically significant differences according to skeletal class, with thicker soft tissues in Class III children and thinner ones in Class II children (p<0.01). Conclusion: The limited number of investigations, as well as the differences in protocols, renders the comparison of results from different studies difficult, suggesting further investigations to enlighten this complex and debated anatomical issue.

scholarly journals The Effects of Functional Appliances on Female Patients with Skeletal Class II Malocclusion 6 Months after Menarche

2016 ◽  
Vol 17 (4) ◽  
pp. 286-293
Author(s):  
Ali AM Jouybari ◽  
Valiallah Arash ◽  
Saeid Tavanafar ◽  
Soraya Khafri ◽  
Zahra Dehghan
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Growth Spurt ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Female Patients ◽  
Skeletal Class Ii ◽  
Soft Tissue Profile ◽  
Functional Appliances ◽  
The Mean

ABSTRACT Aim To investigate the skeletal, dental, and soft tissue changes in girls with class II division 1 malocclusion after growth spurt peak under the effect of activator appliance. Materials and methods In this clinical trial study, 15 female patients, with skeletal class II and mandibular growth deficiency and at least 5 mm overjet, were randomly selected 6 months after their menarche. The mean of their ages at the beginning was 12.33 ± 0.81 years, and in the end it was 13.73 ± 0.79 years; the mean duration of treatment was 12.2 ± 3.18 months. Lateral, cephalometric radiographs were taken from all the patients before and after the treatment. Data were analyzed with Statistical Package for the Social Sciences (SPSS) 20 using paired t-test. Results On an average, the ANB angle, the angle of the upper incisors with the S-N, facial convexity, and overjet decreased by 2.6° ± 0.9, 5.4° ± 0.8, 3.8° ± 3.4, and 5.6 ± 1.8 mm respectively. The SNB angle, the angle of the lower incisors with the N-B, the labiomental angle, the total length of the mandible, the lower anterior facial height, the lower lip distance, the first molar of the mandible, and the soft tissue pogonion to the vertical line from the S point increased by 2.8° ± 1.8, 3.4° ± 3, 14.7 ± 15, 3.7 ± 2.6, 2.1 ± 1.6, 6.3 ± 2.5, 4.4 ± 2.4, and 6 ± 3.3 mm respectively. All these figures were statistically significant (p = 0.000). Conclusion The functional appliance improved the dental–skeletal relations and the soft tissue profile of patients after growth spurt peak of puberty in a group of Iranian girls, whereas dental changes were more than skeletal ones. Clinical significance Functional appliances can be used for correction of skeletal class II malocclusion 6 months after menarche in girls. How to cite this article Jouybari AAM, Arash V, Tavanafar S, Khafri S, Dehghan Z. The Effects of Functional Appliances on Female Patients with Skeletal Class II Malocclusion 6 Months after Menarche. J Contemp Dent Pract 2016;17(4):286-293.

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