hiatus is a situation in which there is no consonant between the nuclei of two adjacent syllables. it occurs when the left syllable lacks a coda while the right one lacks an onset. hiatus occurs in underlying representation or at a level between underlying and phonetic representations. its occurrence is expected in every language, but its resolution is obligatory in languages which require syll...

external inflammatory root resorption (eir) represents a challenge in endodontic practice. eir commonly occurs after dental trauma that results in periodontal ligament injury, pulp necrosis and subsequent infection.  treatment of eir is based on disinfecting the root canal system through chemomechanical procedures and then filling it with calcium hydroxide or triple antibiotic paste. dental tra...