Orthodontics (100% correct answers provided)

What defines IOTN Grade 1? correct answers Minor malocclusions Contact point displacements 1mm What are 2 limitations of orthodontic treatment? correct answers Tooth movement confined to cancellous bone Tooth movement more efficient in children What are 5 aims of orthodontic treatment? correct answers Relieve crowding Correct alignment overbite reduction overjet correction closure of spaces What are the 2 parts of the IOTN? correct answers The dental health component The Aesthetic component What are the benefits of orthodontic treatment? correct answers Displaced teeth are at risk of caries Crowding is associated with perio Increased overjet causes trauma Reduces tooth impaction Improves speech Improves mastication Better aesthetics Improves social/psychosocial wellbeing What defines IOTN Grade 2? correct answers Increased overjet 3.5-6mm with competent lips Reverse overjet 0-1mm Anterior or posterior crossbite with 1mm discrepancy between ICP and RCP Contact point displacements between 1-2mm Increased overbite 3.5mm without gingival contact Pre or post normal occlusions with no other anomalies (up to half a unit) What defines IOTN Grade 3? correct answers Increased overjet 3.5-6mm with incompetent lips Reverse overjet 1-3.5mm Anterior or posterior crossbite 1-2mm discrepancy between ICP and RCP Contact point displacements between 2-4mm Lateral or anterior open bite 2-4mm Deep overbite on gingival or palatal tissues but with no trauma What defines IOTN Grade 4? correct answers Increased overjet 6-9mm Reverse overjet 3.5mm with no masticatory or speech difficulties Anterior or posterior crossbite with 2mm discrepancy between ICP and RCP Posterior lingual crossbite