Group Mean and Standard Errors for 10th, 50th, and 90th Percentile Levels of Activity for the Flexor Digitorum Superficialis, Flexor Pollicis Longus, Extensor Digitorum Communis and Extensor Carpi Radialis Brevis Muscles During Scaling With Four Different I... Group Mean and Standard Errors for 10th, 50th, and 90th Percentile Levels of Activity for the Flexor Digitorum Superficialis, Flexor Pollicis Longus, Extensor Digitorum Communis and Extensor Carpi Radialis Brevis Muscles During Scaling With Four Different Instrument Handles Jessica R. Suedbeck et al. J Dent Hyg 2017;91:47-54 ©2017 by American Dental Hygienists Association