Adjective
periapical (not comparable)
Surrounding an apex (especially of a tooth)
The cause of this situation is usually a periapical or periodontal infection of a maxillary posterior tooth, where the inflammatory exudate has eroded through the bone superiorly to drain into the maxillary sinus. Source: Internet
This speciality degree is awarded in India * Endodontics (also called endodontology) – Root canal therapy and study of diseases of the dental pulp and periapical tissues. Source: Internet