“…The clinical parameters assessed mentioned in the included randomized controlled trials consist of mouth opening, burning sensation, ulceration reduction, relief of fibrous bands, tongue protrusion, cheek flexibility, pain, speech, and swallowing difficulty. Out of 32 studies that measured mouth opening, 18 studies used vernier calipers [ 18 , 36 , 38 , 39 , 40 , 41 , 42 , 43 , 46 , 50 , 51 , 52 , 53 , 55 , 58 , 59 , 61 , 63 ], 3 studies used geometric scale/divider [ 14 , 39 , 60 ], 2 studies used sliding calipers [ 6 , 47 ], 3 studies used a metal scale/divider [ 37 , 56 , 62 ] and 7 studies did not mention any particular scale or divider [ 35 , 44 , 45 , 48 , 49 , 54 , 57 ]. Out of the 32 studies, 15 studies evaluated the burning sensation.…”