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17 AD Dental Tribune Asia Pacific Edition | 6/2017 TRENDS & APPLICATIONS 5d 5e 5f forces would be acting on the roots, minimising stress to the periodontal ligament. Treatment sequence Motion Class III appliance bonded Treatment commenced with the Motion Class III appliance bonded directly to the mandibu- lar canines and first molars with 6 oz, ¼ in. intra-oral elastics, en- gaged for Class III traction to molar tubes bonded to the maxil- lary second molars (Figs. 2a–c). An Essix 0.04 in. vacuum-formed re- tainer (DENTSPLY Raintree Essix) was employed in the upper arch for maximum anchorage. Three months: Class I platform achieved By three months, the sagittal aspect had been corrected to the occlusal lock of the Class I plat- form (Sagittal First) with the anti- clockwise movement of the man- dibular occlusal plane (Figs. 3a–c). The mandibular canines had ex- truded slightly. Some extrusion of canines is a positive sign of the an- ticlockwise rotation of the man- dibular posterior occlusal plane that promotes better positioning of the mandible in relation to the maxilla—a direct effect of the ap- pliance. The Motion appliance was removed and tongue trainers were bonded to the lingual as- pects of the mandibular incisors to continue to train the tongue to position itself properly in the oral cavity, specifically during swal- lowing and mastication. Concur- rent with the tongue trainers, Carriere SLX 0.022 in. PSL brackets were bonded. Treatment followed the Carriere System archwire se- quence. The archwires were all thermally activated wires with lower transformation tempera- tures chosen as archwire sizes in- creased to limit forces on the per- iodontium. Wire sequence: 1. 0.014 in. Cu Nitanium (Henry Schein Orthodontics; 27 °C) 2. 0.014 × 0.025 in. Cu Nitanium (27 °C) 3. 0.017 × 0.025 in. Cu Nitanium (35 °C) 4. 0.019 × 0.025 in. Cu Nitanium (35 °C). When the upper 0.019 × 0.025 in. archwires were engaged, three links of power chain were run bi- laterally from the second premo- lar to the first premolar and from the first premolar to a crimpable hook attached to the wire distal to the lateral incisor to retract the anterior segment, bringing it into the final desired position (Figs. 4a–c). Fourteen months: Sagittal and fixed appliance treatment complete With three months of sagittal treatment and 11 months of fixed appliance treatment, the case was finished to a satisfactory result (Figs. 5a–f). The final cephalometric radiographs and dental panoramic tomograms highlight the posi- tioning and health of the roots, a positive sign that these appliances respect the periodontium. Organizer2017Hong Kong International Dental Expo And SymposiumHKIDEASHong Kong Convention and Exhibition Centrewww.hkideas.org 4 – 6 AUGUSTNEW HORIZON IN DENTISTRYPRELIMINARY FACULTYProfessor Patrick Allen (Singapore)Professor Michael Bornstein (Hong Kong)Dr. Alex Chan (Hong Kong)Dr. Yu-chih Chiang (Taiwan)Dr. Jeanette Chua (Malaysia) Dr. Thomas Hart (United States)Dr. Stephen Henderson (United Kingdom)Professor Li-jian Jin (Hong Kong)Dr. Meetu Kohli (United States)Dr. Kenneth Luk (Hong Kong)Dr. Eduardo Mahn(South America) Professor Won Moon (United States)Dr. Peter Moy (United States)Dr. Peter Pospiech (Germany) Professor Iain Pretty (United Kingdom) Dr. Alan Reid (Australia)Dr. Keng-mun Wong (Singapore)CALL FOR ABSTRACT Deadline: 15 May 2017EARLY-BIRD REGISTRATIONDeadline: 15 May 2017Many more distinguished overseas speakers to follow...