Mini-implant-supported twin-block appliance: An innovative modification

Twin block is a commonly used appliance for correction of retrognathic mandible in growing patients. However, it has a drawback of causing lower incisor proclination, which reduces its potential of achieving maximum skeletal effects. Thus, we introduced a novel modification in the present design to facilitate greater anteroposterior effects in skeletal dimension. The aim of the present case reports is to evaluate the efficacy of this modified twin block. Here we present two cases treated with mini-implant-supported twin-block appliance, which successfully controlled the lower incisor position, thereby increasing the envelope for orthopedic correction in class II myofunctional therapy. This modification is useful in growing patients with retruded mandible to achieve maximum skeletal effects.