A cephalometric analysis of six Twin Block patients. A study of mandibular (body and ramus) growth and development

A study of the effect of the Twin Block appliance on the underdeveloped mandible. Significant growth has been measured cephalometrically and charted on 6 patients, 4 males and 2 females, who have worn the Twin Block for approximately one year. With Pre-Twin Block cephalometric taken, the Twin Block was inserted and bite blocks were advanced approximately every 8 weeks. Progress and Post-Twin Block cephalometric (lateral) radiographs show a significant increase in ramus height and mandibular body length. The purpose of this article is to demonstrate actual mandibular bone growth. A number of the subjects still are in the process of finishing their fixed bracketing phase, and we hope to follow this article with another, demonstrating post Twin Block occlusion and other case finishing factors.