Objectives: The aim of this case report is to introduce an appliance that can be used for correcting severe bilateral symmetric rotation (more than 900) ofsecondpremolars in adult patient. Appliance design and testing: This is a case report ofa 27-year-old female patient with permanent dentition having Class I malocclusion with bi-alveolar dentoalveolar protrusion defined by a severe bilateral rotation (more than 90-) of upper second premolars. Since it was a case of maximum anchorage, we decided to extract upper and lower arch first premolars, and the upper and lower arch were strapped with fixed orthodontic appliance with MBT 0.022 slot PEA brackets and then a spring-loaded transpalatal arch with turbo-Vsprings appliance used to correct severely rotated premolars. After 4 months, both the premolars were orthodontically brought into proper alignment. Circumferential supracrestalfibrotomy was planned to prevent relapse.
Conclusion: Spring-loaded transpalatal arch with turbo- Vsprings appliance can be very effective for correcting severe bilateral rotation (more than 900) of premolar teeth.