Evaluations of the tongue and hyoid bone positions and pharyngeal airway dimensions after maxillary protraction treatment

CRANIO® ◽  
2018 ◽  
Vol 37 (4) ◽  
pp. 214-222 ◽  
Author(s):  
Dong-Min Hwang ◽  
Ji-Yeon Lee ◽  
Yoon Jeong Choi ◽  
Chung-Ju Hwang
Keyword(s):  
Hyoid Bone ◽  
Maxillary Protraction ◽  
Pharyngeal Airway ◽  
Airway Dimensions

scholarly journals Changes in pharyngeal airway dimensions and hyoid bone position after maxillary protraction with different alternate rapid maxillary expansion and construction protocols: A prospective clinical study

2016 ◽  
Vol 87 (4) ◽  
pp. 519-525 ◽  
Author(s):  
Mevlut Celikoglu ◽  
Muhammet Hilmi Buyukcavus
Keyword(s):  
Hyoid Bone ◽  
Rapid Maxillary Expansion ◽  
Vertical Position ◽  
Prospective Clinical Study ◽  
Class Iii ◽  
Maxillary Expansion ◽  
Skeletal Class ◽  
Maxillary Protraction ◽  
Pharyngeal Airway ◽  
Airway Dimensions

ABSTRACT Objective: To evaluate the changes in pharyngeal airway dimensions and the position of the hyoid bone after maxillary protraction with different alternate rapid maxillary expansion and construction (Alt-RAMEC) protocols in patients with skeletal class III malocclusion as a result of maxillary retrusion. Material and Methods: The patients with skeletal class III malocclusions were consecutively divided into two groups. Group 1 consisted of 17 patients (11 boys and 6 girls, mean age 11.31 ± 1.71 years) who had the Alt-RAMEC protocol for 5 weeks, and group 2 consisted of 17 patients (10 boys and 7 girls, mean age 11.64 ± 1.24 years) who had the Alt-RAMEC procedure for 9 weeks. In this study, 4 angular and 13 linear measurements were performed to evaluate the skeletal and pharyngeal airway changes that occurred after maxillary protraction. Results: A significant increase in the maxillary growth, inhabitation of mandibular growth, and clockwise rotation of the mandible caused the improvement of the maxillo-mandibular relationship in both groups. Those changes caused a significant increase in the upper pharyngeal airway dimension (P < .01) and affected the vertical position of the hyoid bone in both groups (P < .05 and P < .01, respectively). However, changes that occurred in both groups were found to be similar for all airway variables (P > .05). Conclusion: Upper pharyngeal dimension and vertical position of the hyoid bone were affected by the maxillary protraction with different Alt-RAMEC protocols. There were no statistically significant differences between the groups.

scholarly journals Pharyngeal Airway Space Dimensions and Hyoid Bone Position in Various Craniofacial Morphologies

2021 ◽  
pp. 030157422110076
Author(s):  
Asal Acharya ◽  
Praveen Mishra ◽  
Rabindra Man Shrestha
Keyword(s):  
Hyoid Bone ◽  
Nasal Fossa ◽  
Observational Research ◽  
Strong Positive Correlation ◽  
Class Iii ◽  
Gender Dimorphism ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
The Relationship ◽  
Airway Dimensions

Objective: To assess the relationship of pharyngeal airway dimensions and the position of the hyoid bone in several craniofacial morphologies among Nepali adults. To assess the relationship between dimensions of the pharyngeal airway and position of the hyoid bone and compare gender dimorphism. Materials and Methods: The cross-sectional observational research comprised lateral cephalograms of 150 subjects aged 16 to 30 years. Samples were separated into three sagittal craniofacial morphological groups based on the ANB (A point, nasion, B point) angle and into gender groups. Different parameters (linear and angular) for measuring dimensions of the pharyngeal airway and position of the hyoid bone were assessed. An ANOVA test and a Pearson correlation test were performed. Results: Dimensions of the pharyngeal airway were largest in skeletal Class III when compared to skeletal Class I and Class II subjects, with a lower pharyngeal airway space and the length of the nasal fossa being significantly larger. The hyoid bone was anteriorly and inferiorly placed in Class III skeletal subjects. Males had greater pharyngeal airway dimensions and a hyoid bone positioned more inferiorly and anteriorly. The nasal fossa length had a strong positive correlation with the hyoid bone position vertically. Conclusion: There were differences in the dimensions of the pharyngeal airway and position of the hyoid bone in various craniofacial morphologies among Nepali adults. Gender dimorphism was observed in both dimensions of the pharyngeal airway and the position of the hyoid bone.

scholarly journals Assessment of the effect of maxillary protraction appliance on pharyngeal airway dimensions in relation to changes in tongue posture

2018 ◽  
Vol 15 (3) ◽  
pp. 208 ◽  
Author(s):  
Niloofar Azadeh ◽  
ShahlaMomeni Danaei ◽  
Shabnam Ajami ◽  
Hamideh Etemadi
Keyword(s):  
Maxillary Protraction ◽  
Pharyngeal Airway ◽  
Airway Dimensions

Comparing Pharyngeal Airway Dimensions and Hyoid Bone Position in the Subgroups of Skeletal Class III Malocclusions: A Cephalometric Study

2020 ◽  
pp. 232020682096086
Author(s):  
MH Buyukcavus ◽  
G Kocakara
Keyword(s):  
Hyoid Bone ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Significance Level ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
Significant Difference ◽  
Cephalometric Study ◽  
Post Hoc ◽  
Airway Dimensions

Aim: To examine pharyngeal airway dimensions and hyoid bone position according to the subgroups of Class III malocclusion. Materials and Methods: This retrospective study consisted of patients divided into three subgroups with skeletal Class III malocclusion. The study included a total of 151 individuals (61 females and 90 males). The authors divided individuals with skeletal Class III malocclusion into three subgroups: maxillary retrognathia, mandibular prognathia, and combined. The study’s cephalometric analysis used eight nasopharyngeal, seven oropharyngeal, two hypopharyngeal, nine hyoid, and four area measurements. One-way analysis of variance was used to evaluate patients. Tukey’s post-hoc tests were used for bilateral comparisons of significant parameters. The results were considered statistically significant at a P < .05 significance level. Results: The study found no significant differences between the groups’ pharyngeal airway and area measurements ( P > .05). When the authors evaluated hyoid bone position, a statistically significant difference was found between the three groups’ Hy-A (mm), Hy-S (mm), Hy-SN (mm), and Hy-FH (mm) measurements ( P < .05). Conclusion: Linear and areal pharyngeal airway dimensions are similar in subgroups of Class III malocclusions, while the hyoid bone is vertically higher in individuals with maxillary retrognathia.

scholarly journals Comparison of Pharyngeal Airway between Mandibular Setback Surgery Patients (Skeletal Class III) and Nonsurgery Patients (Skeletal Classes I and II)

2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Jung-Hsuan Cheng ◽  
Chun-Ming Chen ◽  
Ping-Ho Chen ◽  
Szu-Ting Chou ◽  
Chin-Yun Pan ◽  
...  
Keyword(s):  
Hyoid Bone ◽  
Class Ii ◽  
Class I ◽  
Class Iii ◽  
Pharyngeal Wall ◽  
Skeletal Class ◽  
Pharyngeal Airway ◽  
Mandibular Setback ◽  
Mandibular Setback Surgery ◽  
Airway Dimensions

Purpose. We investigated the pharyngeal airway dimensions and their correlations in patients who underwent mandibular setback surgery versus those who did not. Materials and Methods. One hundred and sixty cephalometric radiographs (120 patients) were obtained from patients with three skeletal malocclusion classifications: Class I and Class II in the nonsurgery group and Class III in the surgery group (preoperative and postoperative cephalograms). The following dimensions were measured: nasopharyngeal airway (NOP), uvulopharyngeal airway (UOP), shortest distance from the posterior tongue to the pharyngeal wall (TOP), and distance from the epiglottis to the pharyngeal wall (EOP). Paired t test, one-way analysis of variance, and Pearson correlation coefficients were used for statistical analysis. Results. Preoperatively, UOP and TOP of skeletal Class III patients (15.2 mm and 16.6 mm) were significantly larger than those of skeletal Class II (11.5 mm and 12 mm) and Class II (12.3 mm and 12.9 mm) patients, respectively. No differences were observed in EOP between the three skeletal patterns. The hyoid bone of Class III patients was significantly anterior to that of Class I/II patients. Furthermore, UOP had a moderate negative correlation with soft palate length. Postoperatively, no significant difference (UOP, TOP, EOP, soft palate width, and hyoid bone) was found between the skeletal classes. Conclusion. Preoperatively, UOP and TOP of skeletal Class III patients were significantly wider than those of skeletal Class I/II patients. Pre- and postoperatively, EOP did not exhibit significant differences among the three skeletal classifications. No differences were found in all postoperative pharyngeal airway dimensions between Class III patients and nonsurgery patients (Class I and Class II).

scholarly journals Changes in Pharyngeal Airway Space and Craniocervical Angle after Anterior Bimaxillary Subapical Osteotomy

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Jung-Hsuan Cheng ◽  
Chun-Feng Chen ◽  
Ping-Ho Chen ◽  
Kun-Jung Hsu ◽  
Han-Sheng Chen ◽  
...  
Keyword(s):  
Hyoid Bone ◽  
Pearson Correlation ◽  
Cervical Vertebra ◽  
Pharyngeal Airway ◽  
Significant Difference ◽  
Group 2 ◽  
Maxilla And Mandible ◽  
Bimaxillary Protrusion ◽  
Airway Dimensions ◽  
Group 1

Purpose. This study explored the effects of genioplasty (Gep) and anterior subapical osteotomy of the maxilla and mandible (ASOMx+ASOMd) on the pharyngeal airway dimensions of patients with bimaxillary protrusion (BiP). Method. Thirty-two patients were divided into 2 groups. Group 1 received ASOMx+ASOMd, and group 2 received ASOMx+ASOMd+Gep. The cephalograms of the patients were collected before surgery and 2 months after surgery. Changes in the landmarks, related cephalometric angles (gonial, SN-GoGn, Y -axis, and SN-C2C4 angles), and 2 pharyngeal airway dimensions (uvulo-pharyngeal airway [UOP] and tongue–pharyngeal airway [TOP]) were analyzed. Results. Before surgery, the parameters (incisor superius, incisor inferius, menton, most superior and anterior point of the hyoid bone, tip of the uvula, inferoanterior point on the second cervical vertebra, and inferoanterior point on the fourth cervical vertebra) and measured angles (SNA, SNB, ANB, gonial, SN-GoGn, Y -axis, and C4C2-SN) of both groups showed no significant differences. Following ASOMx, the patients in groups 1 and 2 exhibited a setback by 7.0 and 6.6 mm, respectively. After ASOMd, groups 1 and 2 exhibited 4.9 and 5.3 mm setbacks, respectively. No significant difference in the amount of setback was observed between groups 1 and 2. The postoperative horizontal and vertical positions of Me in group 2 were significantly forward by 6.1 mm and upward by 1.5 mm, respectively. Regarding pharyngeal airway dimensions, TOP was decreased in group 1 (1.7 mm) and group 2 (1.3 mm). In the postoperative Pearson correlation coefficient test, the horizontal and vertical positions of Me showed no significant correlation with TOP in both groups. Therefore, Gep did not prevent the reduction of TOP in group 2. Conclusion. After bimaxillary anterior subapical osteotomy, the TOP of patients with BiP was decreased, and this situation was unavoidable, regardless of whether Gep was performed.

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