Hi!!! My name is Maria Perez Morales. I am a Dentist and Specialist in Endodontics working and living in Dubai since 11 years ago. I have had the possibility to work with patients that are coming from every where worldwide, and the perception of the pain and the acceptance of the treatment is very different from one culture to another one. I am very interested in your study, because for me the results will have a relevant application at the moment do deal with the day to day of the practitioner in Buccal Surgery and Endodontics