Treatment of Young Permanent Teeth With Different Adjuvant Approaches

To determine antimicrobial efficiency of adjuvant photodynamic therapy (PDT) and high-power diode laser, and essential oils in the treatment of chronic periapical periodontitis in young permanent teeth.

Material and Methods: Young permanent teeth with chronic periapical periodontitis were selected and randomly divided into tests and control groups. Adjuvant treatment approaches were randomly performed following standard mechanical-chemical endodontic treatment:

• Experimental laser-device 1, PDT group: adjuvant PDT (n=10)
• Experimental laser-device 2, Diode laser (940 nm, 1W) (n=10)
• Experimental essential oil (n=10)
• Experimental sodium hypochlorite (NaoCL) group (n= 10) solely mechanical instrumentation with 1.5 % of NaOCl irrigation was performed (positive control).

Afterwards, each root canal was filled with calcium hydroxide, and definitive obturation was done seven days respectively.

Microbiological analyses of root canals were assessed after accessing the canal (sample 1), following mechanical-chemical treatment (sample 2), and adjuvant treatment approaches (sample 3). The microbiological identification and quantification were provided by MALDI -TOF spectrometry and plate count assay. To evaluate the efficiency of treatment modalities, radiography records were additionally used.

Inclusion criteria

• Had signed informed consent by the parents or legal guardian ;
• Systemically healthy children;
• Had not been submitted to antibiotic therapy in the previous 3 months;
• Had a least one young permanent anterior tooth (incisor or canine) or the first premolar with pulp necrosis and presence of a chronic periapical lesion (CPP);
• Had no endodontic treatment of the selected tooth;
• Had no signs of an acute condition;

Exclusion criteria

• Presence of systemic diseases such as diabetes mellitus, asthma, chronic infections, immunosuppressive diseases or other that could compromise the patient immune system
• Use anti-inflammatory or immunosuppressive therapy in the last 6 months;
• Patients with antibiotic prophylactic requirements before dental treatment;