The clear S8 orthopedic therapy: fundamental mechanisms, therapeutic procedures and clinical efficacy    Prof. Gang Shen Professor and Ph.D Supervisor Wuhan University Tai Kang Dental Research Institute   Director  Shanghai Tai Kang ByBo Dental Hospital    Severe Class II jaw discrepancy is mostly due to  overgrowth of the maxilla and backward translation of the mandible, manifested by prognathic facial profile and malocclusion with increased overjet and overbite and deep curve of Spee. One of the most important treatment modalities correcting this particular anomaly is to forward reposition the mandible, leading to not only regional adaptive remodeling of TMJ to support the new position of the mandible, but also restoration of Class I intercuspal occlusion.    The specially designed and customized manufactured clear orthopedic appliances, including S8-SGTB and S8-SGHB, are used to relocate the backward positioned mandible, to modify the growth patterns of the oraofacial bone structures, and to correct malpositioned teeth concomitantly, therefore to correct Class II jaw discrepancies efficiently and effectively. Aided by advanced digitalization and algorithm technology, clear S8 manipulates lower jaw relocation and teeth movement predictably, accurately and precisely.   In Class II malocclusions with mandibular retrution, both the morphology and the size of the lower jaw are favorably normal, and therefore there is no need to gain extra growth to increase the overall mandibular size. What we need is TMJ regional remodeling to secure the mandibular new location, other than to increase its growth rate and the size. The adaptive rehabilitation of TMJ remains active for life long, from childhood and adolescence with pubertal growth spurt,  to adults without any growth potential, indicating mandibular repositioning therapy by S8 in adults is still effective. Furthermore, the radiographic evidence in adults are much more prominent than in adolescents, showing significant new bone apposition on the top of the condyle in response to  S8 therapy.   This lecture will also report on a new classification system for malocclusions with facial prognathism and convexity.


Learning Objectives
After this lecture, you will be able to understand a new classification system for malocclusions with facial convexity
After this lecture, you will be able to receive basic concepts of S8-SGTB in correcting backward positioning of the mandible
After this lecture, you will be able to witness TMJ adaptive remodeling in response to mandibular forward repositioning