Absolute anchorage with universal T-loop mechanics for severe deepbite and maxillary anterior protrusion and its 10-year stability

作者：Choi Yoon Jeong; Chung Chooryung Judi; Choy Kwangchul; Kim Kyung Ho^*

来源：The Angle Orthodontist, 2010, 80(4): 771-782.

DOI：10.2319/052809-304.1

• T-loop mechanics
• Deepbite
• Protrusion
• Stability
• Absolute anchorage
• Congenital missing

An adult patient with severe maxillary protrusion and deepbite who was congenitally missing two mandibular incisors was treated successfully by maximum retraction of the maxillary anterior teeth after extraction of the maxillary first premolars using a moment differential between the anterior and posterior segments created by a universal T-loop. Anterior teeth were moved with controlled tipping, and little anchorage loss of the posterior segments was experienced using the universal T-loop spring. Reduction of overbite was performed by absolute intrusion of both maxillary and mandibular anterior teeth. With retraction of the maxillary anterior teeth and recontouring of the mandibular canines, proper overjet and overbite were achieved. This report shows the 10-year stability of the case treated with the universal T-loop for the first time. (Angle Orthod. 2010;80:771-782.)

• 出版日期2010-7