Case Report
Year: 2020 | Month: August | Volume: 7 | Issue: 8 | Pages: 387-394
Stepwise Advancement in a Removable Twin Block for the Treatment of Class II Div 1 Malocclusion with Laterotrusion- A Case Report
Yukti Raj1, Pradeep Tandon2, Adeel Ahmed Bajjad3, Amit Nagar4
1MDS, Senior Lecturer, Department of Orthodontics, Kothiwal Dental College and Research Centre, Moradabad, UP.
2Professor and Head, Department of Orthodontics, KGMC, Lucknow, UP.
3PG Student, Department of Orthodontics, Kothiwal Dental College and Research Centre, Moradabad, UP.
4Professor, Department of Orthodontics, KGMC, Lucknow, UP.
Corresponding Author: Adeel Ahmed Bajjad
ABSTRACT
Class II malocclusions can manifest in various skeletal and dental configurations in which deficiency in anteroposterior position of the mandible is most common. Purpose of orthopaedics is to modify the pattern of facial growth and the underlying bone structure of the face during growth periods by changing functional muscle environment. Functional appliance therapy eliminates unfavorable developmental factors and reprogram the muscle engram according to McNamara and Clark. The clinical cases shown here are example of these. The mandibular advancement is either done in single advancement or stepwise. Single advancement more than 5mm causes unnecessary strain as stated by Rabie et al. in 2002. Laterotrusion and laterognathia need to be differentiated in the patient (if present) at the time of recording of postural rest position. Laterotrusion is manageable through functional appliances while laterognathia is not.
Keywords: Twin-block, Class II, myofunctional, mandibular advancement, retrognathia.
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