Twin Block vs Herbst vs MARA: Choosing the Right Class II Appliance

Selecting the appropriate Class II correction appliance is one of the most consequential decisions in functional orthodontics. Twin Block: removable, 70-degree bite blocks, compliance-dependent, for growing patients 8-14. Herbst: fixed telescopic mechanism, zero compliance requirement, for severe Class II. MARA: elbow arms, lower profile, moderate Class II. The decision algorithm should consider patient compliance, skeletal severity, and dentition stage.