Three-dimensional skeletal and pharyngeal airway changes following therapy with functional appliances in growing skeletal Class II malocclusion patients

2019 ◽  
Vol 80 (5) ◽  
pp. 254-265 ◽  
Author(s):  
Maged Sultan Alhammadi ◽  
Hanem Younes Elfeky ◽  
Mona Salah Fayed ◽  
Ramy Abdul Rahman Ishaq ◽  
Esam Halboub ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
Skeletal Class Ii ◽  
Functional Appliances

scholarly journals Correlation Analysis between Three-Dimensional Changes in Pharyngeal Airway Space and Skeletal Changes in Patients with Skeletal Class II Malocclusion following Orthognathic Surgery

2022 ◽  
Vol 2022 ◽  
pp. 1-15
Author(s):  
Moonhwan Kim ◽  
Chung-Ju Hwang ◽  
Jung-Yul Cha ◽  
Sang-Hwy Lee ◽  
Young Joon Kim ◽  
...  
Keyword(s):  
Orthognathic Surgery ◽  
Three Dimensional ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Sectional Area ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
Skeletal Changes ◽  
Skeletal Class Ii ◽  
Anterior Posterior

Introduction. Studies on the pharyngeal airway space (PAS) changes using three-dimensional computed tomography (CT) have shed more light on patients with Class III than Class II malocclusion. This paper focuses on analyzing the long-term changes in the PAS and evaluating the postoperative association between these PAS and skeletal changes in patients with skeletal Class II malocclusion who have undergone orthognathic surgery. Methods. The records of 21 patients with skeletal Class II malocclusion who had undergone orthognathic surgery were included. The anatomical modifications in both jaws, changes in volume, sectional area (SA), minimum sectional area (MSA), and anterior-posterior (AP) and transverse (TV) width in the airway at one month before surgery ( T 0 ), and one month ( T 1 ) and one year ( T 2 ) after surgery were analyzed using CT images. The association between the skeletal and airway changes was evaluated between T 0 , T 1 , and T 2 . Results. After surgery, the ANS, A point, and PNS demonstrated significant posterior and superior movement. The B point and the pogonion exhibited substantial anterior and superior movement. The total and inferior oropharyngeal volumes (vol 3, vol 4) notably increased, while the nasopharyngeal volume (vol 1) decreased. The anterior-posterior movement at the ANS and PNS after surgery was significantly associated with the total volume, vol 2, vol 3, SA 1, MSA, and TV width 1, while substantial association with the total volume was found at the pogonion. Conclusion. Thus, an ideal treatment plan can be formulated for patients with skeletal Class II malocclusion by considering the postoperative PAS changes.

scholarly journals Twin block appliance: Effect on pharyngeal airway

2018 ◽  
Vol 7 (4) ◽  
pp. 147-152
Author(s):  
Vivek Bikram Thapa ◽  
Amrita Shrestha ◽  
Prabesh Sherchan ◽  
Prakash Poudel ◽  
Luna Joshi
Keyword(s):  
Soft Palate ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Twin Block ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
Skeletal Class Ii ◽  
Obstructive Sleep ◽  
Lateral Cephalograms ◽  
Mandibular Retrusion

Background: Mandibular retrusion is the main cause of Skeletal Class II malocclusion characterized by skeletal retrusion of mandible with skeletal or dentoalveolar protrusion of maxillary. Objectives: This study was conducted to evaluate effect of treatment with twin-block appliances on pharyngeal dimensions. Methodology: This study was conducted in in the Department of Orthodontics & Dentofacial Orthopedics in Kathmandu Medical College. Twenty patients of age group 7 to 14 years with skeletal class II malocclusion with mandibular retrusion were selected. Variables evaluated were depth of nasopharynx; height of nasopharynx; depth of oropharynx; depth of hypopharynx; soft palate length; soft palate thickness and soft palate inclination. The lateral cephalograms were obtained for all subjects before the start of treatment and after a follow-up period of approximately three months in treatment. Results: Results showed that depth of nasopharynx increased by 1 mm, height of nasopharynx increased by 0.78 mm, depth of nasopharynx increased by 1.97 mm, depth of hypopharynx increased by 0.79 mm, soft palate length decreased by 4 mm, soft palate thickness increased by 2 mm and soft palate inclination decreased by 7.01 mm. The results for depth of pharynx and soft palate thickness were statistically significant. Conclusion: This study concluded that the use of twin block appliance for class II patients corrects sagittal dimension of oropharynx and hypopharynx. Early intervention for mandibular retrognathism in class II malocclusion helps enlarge the airway dimensions and decrease potential risk of obstructive sleep apnea syndrome for growing patients in the future.

scholarly journals A Retrospective Cephalometric Evaluation of Dental Changes with Activator and Activator Headgear Combination in the Treatment of Skeletal Class II Malocclusion

2011 ◽  
Vol 12 (1) ◽  
pp. 14-18 ◽  
Author(s):  
G Anil Kumar ◽  
Amit Maheshwari
Keyword(s):  
Class Ii ◽  
Combination Group ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Mandibular Incisor ◽  
Lower Incisor ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Lateral Cephalograms ◽  
Functional Appliances

ABSTRACT Aim The aims of this study were to evaluate the dental changes brought about by activator and activator headgear combination (ACHG) and to determine whether we can achieve control over the lower incisor proclination which is a side effect of using functional appliances; or not, while treating cases of skeletal class II malocclusions. Methods Lateral cephalograms of 45 skeletal class II division 1 patients were selected for the study. Fifteen of them were successfully treated with an Andresen activator and the other 15 with an activator headgear combination. Fifteen class II subjects who had declined treatment served as the control group. Cephalometric landmarks were marked by one author to avoid interobserver variability. Results The results revealed that both the activator and the activator headgear combination significantly (p < 0.001) affected dental variables measured. The mandibular incisor proclination was effectively controlled in the activator headgear combination group. Conclusion An activator headgear combination would offer itself as a better option compared with activator alone in the treatment of skeletal class II malocclusions especially in cases with proclined mandibular incisors. Clinical significance When one of the treatment goals is to achieve a greater control over mandibular incisor proclination in the treatment of Skeletal Class II malocclusions, employing a combination of activator and headgear may substantially improve clinical outcomes. How to cite this article Lall R, Kumar GA, Maheshwari A Kumar M. A Retrospective Cephalometric Evaluation of Dental Changes with Activator and Activator Headgear Combination in the Treatment of Skeletal Class II Malocclusion. J Contemp Dent Pract 2011;12(1):14-18.

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.

Sign in / Sign up

Export Citation Format

Share Document