“…Moreover, high-frequency ultrasound has shown efficacy on scanning subgingival crown preparation and gingival thickness [57] , [140] . Hence, it’s role as a diagnostic tool for salivary glands has been widely investigated [141] , [142] , [143] , [144] , [145] , [146] , [147] , [148] , [149] , [150] , [151] , [152] , [153] , [154] , as well as the evaluation of temporomandibular joint disorders [48] , [56] , [155] , [156] , [157] , [158] , [159] , [160] , [161] , [162] ( Fig. 7 and Appendix Table 4 ).…”