OPEN-ACCESS PEER-REVIEWED
Swamy Aravindh1a*,1b, Thiruppathy Manigandan2, Ramalingam Shakila3, Elamvaluthi M4, Premkumar P5, Gowardhan Sivakumar6
1a* Research Scholar, Department of Oral Medicine & Radiology, Bharath Institute of Higher Education and Research, Tamil Nadu, India, Chennai-600059.
1bAssistant Professor,. Department of Oral Medicine & Radiology, Karapaga Vinayaga Institute of Dental Sciences, Affiliated to The Tamilnadu Dr.M.G.R.Medical University,Maduranthakam,Tamil Nadu 603308.
3Professor, Department of Oral Medicine & Radiology, Sree Balaji Dental College & Hospital, Affiliated Bharath Institute of Higher Education and Research.
4Professor, Department of Oral Medicine & Radiology, Karpaga Vinayaga Institute of Dental Sciences. Affiliated to The Tamil Nadu Dr.M.G.R. Medical University.
4 Assistant Professor, Department of Orthodontics & Dentofacial Orthopedics, Madha Dental College and Hospital, Kundrathur, Chennai, Sikkarayapuram, Tamil Nadu 600069
5 Associate Professor, Department of Public Health Dentistry, Best Dental Science College, Madurai, Tamil Nadu 625104.
6 Post-Graduate, Department of Maxillofacial Prosthodontics, Ragas Dental College and Hospital Uthandi, Tamil Nadu 600119.
Abstract
Background: Early assessment of functional factors can be vital for restoring normal craniofacial growth in growing patients with skeletal discrepancies.
Aim: To compare airway volumes in patients with mandibular retrognathism with the normal anteroposterior skeletal relationship, thereby assessing the association between cephalometric variables and airway morphology.
Methods: Cone Beam Computed Tomography volume scans, lateral cephalograms, 3-dimensional airway volume, and cross-sectional areas of 100 healthy children (46 boys and 54 girls mean age 15.19
± 1.28) which were done for orthodontic assessment were evaluated. The subjects were divided into 2 groups based on the angle formed between point A, Nasion, and point B (ANB) values, and cephalometric variables (such as anterior and posterior facial height, gonial angle, etc.) airway volumes, and cross-sectional measurements were compared using independent t-tests. Pearson’s correlation coefficient test was used to detect any relationship between different parts of the airway and between airway volume and 2- 2-dimensional cephalometric variables.
Results: Means and standard deviations for cephalometric, cross-sectional, and volumetric variables were compared. ANB, mandibular body length, and facial convexity were statistically highly significant (P < 0.01) whereas condyle on point A, nasal airway, and total airway volume (P < 0.05) were statistically significant. The nasal airway volume and the superior pharyngeal airway volume had a positive correlation (P < 0.01), the nasal airway was correlated to the middle (P < 0.05) and total airway superior had a relation with the middle (P < 0.05), inferior and total airway (P < 0.05), the middle was related to all other airways; inferior was also related to all the airways except nasal. Lateral cephalometric values were positively correlated with the airway volume with Frankfurt Mandibular Plane Angle and facial convexity showed significant correlations with total airway volume (P < 0.05). Additionally, ANB angle was significantly correlated with total airway volume and superior airway (P < 0.05).
Conclusion: The mean total airway volume in patients with a retrognathic mandible was significantly smaller than that of patients with a normal mandible.
References
[1]. Alhammadi MS, Almashraqi AA, Helboub E, Almahdi S, Jali T, Atafi A, Alomar F. Pharyngeal airway spaces in different skeletal malocclusions: a CBCT 3D assessment. Cranio2019: 1-10 [PMID: 30821659 DOI: 10.1080/08869634.2019.1583301]
[2]. Angle E. Treatment of malocclusion of the teeth. Philadelphia: SS White Manufacturing Company. 1907
[3]. Arun T, Isik F, Sayinsu K. Vertical growth changes after adenoidectomy. Angle Orthod 2003; 73: 146-150 [PMID: 12725370]
[4]. Ayoub N, Eble P, Kniha K, Peters F, Möhlhenrich SC, Goloborodko E, Hölzle F, Modabber A. Three-dimensional evaluation of the posterior airway space: differences in computed tomography and cone beam computed tomography. Clin Oral Investig 2019; 23: 603-609 [PMID: 29725852 DOI: 10.1007/s00784-018- 2478-y]
[5]. Barrera JE, Pau CY, Forest VI, Holbrook AB, Popelka GR. Anatomic measures of upper airway structures in obstructive sleep apnea. World J Otorhinolaryngol Head Neck Surg 2017; 3: 85-91 [PMID: 29204584 DOI: 10.1016/j.wjorl.2017.05.002]