Application of Mini-implants and a New-type Posterior Tube Appliance for Premolar Extraction Cases
Lecture Description
Introduction : With the use of mini-screws or mini-implants as temporary skeletal anchorage devices (TSADs), the scope of orthodontic treatment has been expanded. However, unexpected side effects such as unwanted molar movement have also occurred. Among various TSADs, a mini-implant with a hole on its head has been introduced and used.
Discussion : In cases with good molar occlusion or poor periodontal condition, it would be better to minimize the period of bonding fixed orthodontic appliances on the posterior teeth. By passing the archwire through the head hole of mini-implant, it is possible to minimize the bonding period of the posterior teeth without the side effects that often occurred when using conventional mini-screws. It can also promote effective tooth movement during the space closing stage by reducing friction between the appliance and the archwire. In addition, a new tube-type appliance that is bonded on the mandibular posterior teeth has been developed. They are used as an auxiliary device, connecting mandibular premolar and molar to reinforce the anchorage.
Conclusion : In the presentation, the pros and cons of this approach identified through clinical experience are presented. It is expected that the suggested method will help in planning orthodontic treatment for premolars extraction cases as an extra option.
October 28-30, 2022 ¡¤ COEX, Seoul, Korea