Study: NCT03704857

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Foraminal Enlargement / Irrigating solutions / Filling materials
Description: Instrumentation with foraminal enlargement and various irrigation solutions and filling materials will be performed according to the allocated group.~The foraminal enlargement provides better results in the bacterial removal of the apical portion of the root canal. This instrumentation will be done with the Reciproc 40 or 50 system in the apical foramen, determined by the apical locator.~To contribute to disinfection of the root canal, sodium hypochlorite and chlorhexidine are the most widely used irrigators. Sodium hypochlorite has a broad antimicrobial spectrum and an effective ability to dissolve organic matter and necrotic tissue; while chlorhexidine shows substantivity and antimicrobial residual activity when used as an irrigating substance.~Besides that, MTA Fillapex or AH Plus will be used and the recommended filling technique will be lateral condensation.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Foraminal Enlargement / Irrigating solutions / Filling materials
Description: Instrumentation with foraminal enlargement and various irrigation solutions and filling materials will be performed according to the allocated group.~The foraminal enlargement provides better results in the bacterial removal of the apical portion of the root canal. This instrumentation will be done with the Reciproc 40 or 50 system in the apical foramen, determined by the apical locator.~To contribute to disinfection of the root canal, sodium hypochlorite and chlorhexidine are the most widely used irrigators. Sodium hypochlorite has a broad antimicrobial spectrum and an effective ability to dissolve organic matter and necrotic tissue; while chlorhexidine shows substantivity and antimicrobial residual activity when used as an irrigating substance.~Besides that, MTA Fillapex or AH Plus will be used and the recommended filling technique will be lateral condensation.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Foraminal Enlargement / Irrigating solutions / Filling materials
Description: Instrumentation with foraminal enlargement and various irrigation solutions and filling materials will be performed according to the allocated group.~The foraminal enlargement provides better results in the bacterial removal of the apical portion of the root canal. This instrumentation will be done with the Reciproc 40 or 50 system in the apical foramen, determined by the apical locator.~To contribute to disinfection of the root canal, sodium hypochlorite and chlorhexidine are the most widely used irrigators. Sodium hypochlorite has a broad antimicrobial spectrum and an effective ability to dissolve organic matter and necrotic tissue; while chlorhexidine shows substantivity and antimicrobial residual activity when used as an irrigating substance.~Besides that, MTA Fillapex or AH Plus will be used and the recommended filling technique will be lateral condensation.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Foraminal Enlargement / Irrigating solutions / Filling materials
Description: Instrumentation with foraminal enlargement and various irrigation solutions and filling materials will be performed according to the allocated group.~The foraminal enlargement provides better results in the bacterial removal of the apical portion of the root canal. This instrumentation will be done with the Reciproc 40 or 50 system in the apical foramen, determined by the apical locator.~To contribute to disinfection of the root canal, sodium hypochlorite and chlorhexidine are the most widely used irrigators. Sodium hypochlorite has a broad antimicrobial spectrum and an effective ability to dissolve organic matter and necrotic tissue; while chlorhexidine shows substantivity and antimicrobial residual activity when used as an irrigating substance.~Besides that, MTA Fillapex or AH Plus will be used and the recommended filling technique will be lateral condensation.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Foraminal Enlargement / Irrigating solutions / Filling materials
Description: Instrumentation with foraminal enlargement and various irrigation solutions and filling materials will be performed according to the allocated group.~The foraminal enlargement provides better results in the bacterial removal of the apical portion of the root canal. This instrumentation will be done with the Reciproc 40 or 50 system in the apical foramen, determined by the apical locator.~To contribute to disinfection of the root canal, sodium hypochlorite and chlorhexidine are the most widely used irrigators. Sodium hypochlorite has a broad antimicrobial spectrum and an effective ability to dissolve organic matter and necrotic tissue; while chlorhexidine shows substantivity and antimicrobial residual activity when used as an irrigating substance.~Besides that, MTA Fillapex or AH Plus will be used and the recommended filling technique will be lateral condensation.

Intervention type: OTHER
Group type: ACTIVE_COMPARATOR
Intervention: Foraminal Enlargement / Irrigating solutions / Filling materials
Description: Instrumentation with foraminal enlargement and various irrigation solutions and filling materials will be performed according to the allocated group.~The foraminal enlargement provides better results in the bacterial removal of the apical portion of the root canal. This instrumentation will be done with the Reciproc 40 or 50 system in the apical foramen, determined by the apical locator.~To contribute to disinfection of the root canal, sodium hypochlorite and chlorhexidine are the most widely used irrigators. Sodium hypochlorite has a broad antimicrobial spectrum and an effective ability to dissolve organic matter and necrotic tissue; while chlorhexidine shows substantivity and antimicrobial residual activity when used as an irrigating substance.~Besides that, MTA Fillapex or AH Plus will be used and the recommended filling technique will be lateral condensation.

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Photobiomodulation
Description: aPDT will be performed with 0.01% methylene blue solution and it will be inserted into the root canal for 5 minutes. The excess will be removed and irradiation will be performed inside the root canal with the red laser of Índio Gálio Alumínio Fósforo (660nm, Laser Duo, MMOptics, São Paulo, SP, Brazil) for 90 seconds. Laser therapy with Gallium-Aluminum-Arsenic infrared laser (808nm, Laser Duo, MMOptics, São Paulo, SP, Brazil) will be performed on the gingiva from the vestibular face and on the palatal / lingual face, both located in the periapical region for 40 seconds.