Abhay Kumar Jain

Abstract

Objectives: The measurements for assessing the antero-posterior discrepancy between the apical bases are many with their individual benefits and shortcomings. So, it is very important to categorize the reliability of the major diagnostic criteria for successful planning of treatment and to fore see the outcome. The present study assesses the predictability of Wits appraisal, ANB, Beta, Yen, W, µ and Pi angles as an indicators of anteroposterior dysplasia. Materials and Methods: A total of 120 lateral cephalograms of skeletal Class I, II and III patients were selected based on Down’s facial angle and then tracing was carried out manually to measure Wits appraisal, ANB, Beta, Yen, W, µ and Pi angles. Analysis of variance and correlation coefficient analysis were done to assess the significance of association between these variables. Results: Yen angle is highly predictable and a homogenously distributed angular parameter used to assess sagittal discrepancy. The most desirable differentiation results among the three skeletal relationship were represented by Beta angle followed by Yen angle. Statistically significant correlation among the seven parameters for skeletal Class I relationship were shown by Yen and W angle, for skeletal Class II relationship by Beta angle and µ angle and for skeletal Class III relationship by Beta angle and W angle. No statistically significant correlation existed between Yen Angle and Beta Angle in all the three groups. Conclusion: Yen angle was found to have the most homogenous and predictable parameter. A statistically significant correlation for skeletal Class I relationship were observed between Yen and W angle, for skeletal Class II relationship between Beta and µ angle and for skeletal Class III relationship between Beta angle and W angle and they can be used interchangeably in assessing skeletal jaw relationship. Keywords: Wits Appraisal, ANB angle, Beta angle, Yen angle, W angle, µ angle and Pi angle

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Abstract

Maxillary and mandibular skeletal discrepancies are one of the commonly prevailing malocclusion in the childhood. Many a time it is ignored by the parents as well as the clinicians. It can present itself with aesthetic, functional and psychological problems of the child. Proper identification, diagnosis and treatment planning at the proper age can lead to correction and improvement in the overall facial balance and psychological esteem of the child. Over the years orthopedic and myofunctional appliances has been used to correct Class II and Class III skeletal malocclusion in a growing child. Face mask therapy with RME has been used as treatment choice to treat a patient with skeletal Class III malocclusion. Orthopedic correction in the early stage of life can eliminate the severity and further complex treatment modalities in the later stages of life. This case report describes the treatment of male child aged 12 years who had skeletal Class III malocclusion with maxillary deficiency. The treatment was done in two phases; orthopedic correction was done initially using RME Facemask followed by fixed orthodontic correction. There was overall improvement in the facial profile and occlusion of the patient post treatment.   Keywords: Class III malocclusion, Face mask therapy, RME, Orthopedic correction, Two phase therapy

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