“…The various clinical and functional stagings were done earlier without considering the normal maximum mouth-opening limit of an individual (Haider et al, 2000, Bhagvan More et al, 2012, Patil and Maheshwari, 2014, Jani and Dudhia, 2016, Passi et al, 2017). The TFI is an established method to estimate a normal maximum mouth-opening limit in an individual and was used by different authors (Chima and Obiechina, 1995, Zawawi et al, 2003, Agrawal et al, 2015).…”