Class 2 Biomechanics with Aligners
from orthodontics In summary Hosted by Farooq Ahmed
Join me for a summary of Dr Bing Fang’s lecture entitled: Biomechanical Research and clinical application of orthopaedic Treatment on Adolescent mandibular retrognathia. It was part of the first International Orthodontic Foundation online symposium, with Ravi Nanda: https://www.iofglobal.org Intrusion with aligners Clinical risk of anterior intrusion, can cause retroclination / proclination. Plan with assessing lower incisor inclination relative to skeletal structure from a cephalogram To figure out this problem they designed a finite element study to figure out what happens for different lower incisor inclinations If the IMPA angle exceeded 100 the intrusive force will be in front of CR resulting in a moment causing lingual root torque and buccal crown torque If the IMPA angle less than 100 the intrusive force will be behind the CR resulting in a moment causing buccal root torque and lingual crown torque Plan intrusion: Proclined teeth: intrusion and retraction at the same time with lingual crown torque Retroclined teeth: Intrusion, with labial crown torque Advanced Mandibular Spring AMS with aligner Telescopic arm with spring. Distalization of posterior and no movement in the anterior along with anterior bit turbos Class II elastics are used day time, appliance at night Inserts into connectors which are imbedded into the aligner How does it work Finite model analysis, favourable for advancing the mandible – PDL even stress, promote mandibular growth, stress on condylar anterior aspect and posterior glenoid fossa #alignerorthodontics #class2 #Bingfang #farooqahmed
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