The following Topics for ESE Helsinki 2021 are applicable to the Original Scientific Research and Oral presentations on freely chosen subjects submissions:

Epidemiology
Pulp and periapical tissue biology and pathology
Microbiology
Local anaesthesia and pain control
Tooth and canal anatomy
Access cavity preparation
Electronic apex locators and working length estimation
Irrigants/medicaments - antimicrobial activity
Irrigants/medicaments - canal cleaning
Irrigants/medicaments - dentine disinfection
Irrigants/medicaments - other
Canal filling – general
Canal filling - leakage
Canal filling – MTA/calcium silicate cements
Canal filling - sealers
Imaging
Canal preparation - apical extrusion
Canal preparation - cleaning ability
Canal preparation - shaping ability
Instruments – cyclic fatigue and fracture
Restoration of root filled teeth
Root canal retreatment
Bleaching
Endodontic surgery
Trauma and root fractures
Endodontic revitalization/regeneration
Treatment planning
Endo-perio-ortho-implant relation
Clinical outcome studies - vital pulp therapies
Clinical outcome studies – root canal treatment and retreatment
Clinical outcome studies – endodontic surgery
Biocompatibility and bioactivity
Education
Other
Case report or case series
New clinical techniques and materials
Evaluation of a technique/materials