“…In addition, the OHIP (OHIP-20E; OHIP-EDENT questionnaire) 19,23,24 was also used to elicit response on functional limitation, pain, psychological discomfort, psychological disability, physical disability, social disability, and general satisfaction. The OHIP-20 uses a scale with six categories (1 = always, 2 = most of the time, 3 = some of the time, 4 = occasionally, 5 = rarely, and 6 = never).…”