Japanese team invents movable tongue prosthesis to enable speech for cancer victims
Source: www.japantimes.co.jp Author: Tomoko Otake Dentistry researchers at Okayama University have come up with what could be the world’s first movable tongue prosthesis to help oral cancer patients who have partially lost the ability to speak. The invention, the product of a team led by Shogo Minagi, a professor of dentistry at the university, is good news for scores of oral cancer victims in Japan with speech problems. The number of oral cancer patients in the nation has surged to 7,800 in 2015, up from around 2,100 in 1975, according to estimates by the Japan Society of Oral Oncology. The figure does not include those with damaged tongues from traffic accidents and other physical injuries. Minagi’s work was inspired by Kenichi Kozaki, also a dentistry professor at Okayama University and an expert on dental pharmacology. Kozaki was diagnosed with tongue cancer in May 2014 and has had most of his tongue surgically removed. Kozaki asked Minagi to create a tongue prosthesis that he could use to speak. Minagi said he looked into tongue prostheses developed in the past but found just one paper in Japan, in which the artificial tongue was part of a denture and could not be moved. “Developing an oral prosthesis is a painstaking process for patients,” Minagi said by phone Monday. “This time, we could create a really good prosthesis quickly thanks to Kozaki, who is a dentist himself. He tried many different versions of the prosthesis and offered us detailed feedback.” When a person speaks, [...]