The Role of Low Level Laser Therapy in Acceleration of Teeth Alignment in Lingual Orthodontic Patients

low level laser therapy will be used in order to induce tooth movement. low level laser with a wave length of 830 nm, output of 150 mw, energy of 2 j per point and application time of 15 seconds per point will be applied on each tooth of the six upper incisors according to this protocol: the root will be divided into 2 halves; gingival and cervical. Laser will be applied in the center of each half from both the buccal and palatal sides which means 4 application points and a total energy of 8 Joules/each tooth.

Lingual braces will be used to conduct the orthodontic treatment of patients with moderate level of crowding on the upper dental arch.