Ward ثائر أكرم, AL-jundi عزام, and Bourhan أحمد. 2019. “Evaluation of the Ability of T Loop and Bend Back to Achieve Genuine Intrusion During the Acceleration of Upper Incisors Intrusion Movement Using the Er:YAG Laser”. University of Aden Journal of Natural and Applied Sciences 23 (1):111-27. https://doi.org/10.47372/uajnas.2019.n1.a10.