Group I: Twin block group
incisors, malocclusion
Wax bite registration included advancing the mandible of each patient until the upper and lower central incisors were in an edge-to-edge relation and a gap of 2–3 mm beyond the freeway space. Depending on the degree of the malocclusion, the procedure included one or two stages of advancement. The appliance should be worn at all times except for eating, as per the instructions [