Interceptive Ortodontics Using Growth Modification Method with Twin Block Functional Appliance: A Case Report

Introduction: Class II Angle malocclusion is a condition which mandibular first molars occludes distally from the normal occlusion. Treatment modalities for class II malocclusion includes interceptive orthodontics using growth modification. Interceptive orthodontics is a type of orthodontic treatment performed when signs of malocclusion are present. This method can treat class II malocclusion with retrognathic mandible, but it must be done before the end of growth spurt period. Twin block appliance is one example of appliance that commonly used in interceptive orthodontics. Case report: a 14-year-old boy came to the Department of Pediatric Dentistry at RSGM Universitas Padjadjaran with chief complaints of irregular teeth, protrusive, esthetic problem, and difficulty in brushing his teeth. The patient had an accident while playing basketball and hit his protrusive anterior teeth. Discussion: Twin block is the most popular functional appliance used for the management of mandibular retrognathia in growing patients. Twin block are designed to position the mandible down and forward to stimulate or accelerate mandibular growth, and its function to increase intermaxillary space in the anteroposterior and vertical dimensions, and eliminate abnormal and restrictive muscle activity that prevents abnormal development of the maxilla and mandible. Conclusion: Interceptive orthodontic treatment with growth modification using twin blocks is very effective to maximize the growth of the mandibular.