Taiwanese dentists have urged fast food chains to drop
over-sized hamburgers from their menus following a growing number
of jaw injury cases, a report said Thursday.
Patients have developed sore jaws or had difficulties opening
their mouths after consuming giant burgers, the China Post quoted
professor Hsu Ming-lung of the School of Dentistry at National
Yang-Ming University as saying.
Problems can arise when fast-food fans tuck into hamburgers
larger than eight centimetres (three inches) high, Hsu said
according to the paper.
A human mouth is designed to gape over objects measuring up to
four centimetres, and overextending can hurt the joint between the
jawbone and the temporal bone in front of the ears, Hsu said.