London, July 9 (IANS) A professor of dentistry in Taiwan has asked fast food chains to drop over-sized burgers due to a number of jaw injury cases.
People have developed sore jaws or faced difficulty in opening their mouth after consuming giant burgers, Daily Telegraph quoted Hsu Ming-lun of the School of Dentistry at National Yang-Ming University in Taiwan as saying.
Problems can arise when fast-food fans eat hamburgers larger than three inches high as a human mouth is designed to gape over objects measuring up to one-and-a-half inches.
Hsu explained that over-extending can hurt the joint between the jawbone and the temporal bone in front of the ears.
