Abstract

Background: There is a lengthy and contentious history of the connection between respiratory function and the development of occlusal and craniofacial morphology. Mouth-breathing influences skeletal growth and thereby affect the cephalometric parameters. The present study aimed to determine the YEN angle in children with mouth breathing habit having Class I occlusion. Aim: Determination of YEN angle in children with mouth breathing habit. Settings and Design: Department of Pediatric and Preventive Dentistry, Mahe institute of dental sciences, Mahe. Prospective study. Methods: 48 children of age group 9-12 years with mouth-breathing habit having Class I malocclusion were selected. Water holding and butterfly test was used to confirm the diagnosis of the habit. Their lateral cephalograms were taken and the ANB angle, Wit’s assessment YEN angle was measured by manual methods. The Pearson’s correlation coefficient and the coefficient of variation statistical analysis were carried out with an alpha level of 5%. Results: The mean YEN angle in mouth breathers with Class I occlusion was 119.7±2.783°. The YEN angle showed a moderately negative correlation with the ANB angle, which was statistically significant (r=-0.31, p=0.03). Conclusion: From our study we found that the YEN angle is a homogenously distributed angular parameter that is highly predictable when utilized to evaluate sagittal discrepancy in patients with Class I occlusion having mouthbreathing habit.

• 1.   Chung LM, P. BeltriOrta. Comparison of cephalometric patterns in mouth breathing and nose breathing children. Int J Pediatr Otorhinolaryngol. 2014.
• 2.   McNamara JA. Influence of respiratory pattern on craniofacial growth. Angle Orthod. 1981;51(4):269–300.
• 3.   Moss ML, Salentijn L. The primary role of functional matrices in facial growth. Am J Orthod. 1969;55(6):566-77.
• 4.   Zheng W, Zhang X, Dong J, He J. Facial morphological characteristics of mouth breathers vs. nasal breathers: A systematic review and metaanalysis of lateral cephalometric data. ExpTher Med. 2020;19(6):3738-50.
• 5.   Bakor SF, Enlow DH, Pontes P, De Biase NG. Craniofacial growth variations in nasal-breathing, oral-breathing tracheotomized children. Am J Orthod Dentofacial Orthop. 2011;140(4):486-92.
• 6.   Neela PK, Mascarenhas R, Husain A. A new sagittal dysplasia indicator: The Yen angle. World J Orthod. 2009;10:147–51.
• 7.   Mittal A, Bohra S, Murli S et al. An evaluation of Yen and W angle in assessment of anteroposterior jaw relationship. J Indian Orthod Soc. 2016;50:26–30.
• 8.   Jain S, Raghunath N, Murlidhar N. A comparision of W angle, Pi angle and Yen angle as an indicator for assessing anteroposterior skeletal dysplasia in various malocclusions among regional population: A cephalometric study. Int J Dent Res Develop. 2018;8:29–40.
• 9.   Katti CG, Mohan A, A A. Predictability of ANB, Beta and YEN angles as anteroposterior dysplasia indicators in Gulbarga population. J Indian Orthod Soc. 2020;54(4):321-24.
• 10.   Jacobson A. Application of the “Wits” appraisal. Am J Orthod. 1976;70:179-89.
• 11.   Hussels W, Nanda RS. Analysis of factors affecting angle ANB. Am J Orthod. 1984;85:411-23.
• 12.   Roth R. The Wits appraisal: its skeletal and dentoalveolar background. Eur J Orthod. 1982;4.
• 13.   Chang HP. Assessment of anteroposterior jaw relationship. Am J Orthod Dentofacial Orthop. 1987;92:117-22.
• 14.   Doshi JR, Jain P, Jain M, et al. Mount Vernon Index vs Yen angle for assessment of anteroposterior apical jaw base relationship. Int J ClinPediatr Dent. 2021;14(1):32-5.
• 15.   Mehta PH, Bansal N, Singh Get al.Evaluation of Beta, Yen W angle in assessment of anteroposterior jaw relationship in North Indian population: A Cephalometric Study. J Mahatma Gandhi Univ Med Sci Tech. 2021;6(2):60-3.
• 16.   Baik CY, Ververidou M. A new approach of assessing sagittal discrepancies: The Beta angle. Am J Orthod. 2004;126(1):100-5.
• 17.   Brown M. Eight methods of analyzing a cephalogram to establish anteroposterior skeletal discrepancy. Br J Orthod. 1981;8(3):139-46.
• 18.   Rotberg S, Fried N, Kane J, Shapiro E. Predicting the “Wits” appraisal from the ANB angle. Am J Orthod. 1980;77(6):636-42.

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