Boitlhakiso Tlhaloso:
Ho ngaka ea meno ea tlhaho ea Northwest, re sebetsa ka ho khetheha ho lingaka tsa meno tse lumellanang le biocompatible, tse se nang chefo ho kenyelletsa ho tlosoa ka mokhoa o bolokehileng ha mercury le ho khutlisetsa meno ntle le tšepe.