Biopharmaceuticals like insulin have been used for decades in medical practice, but dental medicine has few such drugs and those that are used are delivered invasively, often through gum surgery.   Now, a report in Biomaterials by Penn Dental Medicine's Dr. Michel Koo and Dr. Henry Daniell suggests a new approach for delivering a biopharmaceutical to treat and prevent oral diseases, including cavities.   Using plants to produce antimicrobial peptides, the researchers were able to kill t...