Chen Y.-L.Chen H.-Y.YU-CHIH CHIANGHAO-HUENG CHANGCHUN-PIN LIN2021-07-072021-07-0720150929-6646https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940435905&doi=10.1016%2fj.jfma.2013.06.006&partnerID=40&md5=6091fb9e43ee79cff0d64aefcb40747fhttps://scholars.lib.ntu.edu.tw/handle/123456789/570023Effect of the precrack preparation with an ultrasonic instrument on the ceramic bracket removaljournal article10.1016/j.jfma.2013.06.006238563442-s2.0-84940435905