Estimate the Effect of aPDT on Root Canal Disinfection

Acess the Clinical Effect of Antimicrobial Photodynamic Therapy (aPDT) on Root Canal Disinfection

The aim of this study is to compare the clinical effect of traditional root canal disinfection and aPDT on root canal disinfection. And provide the reference for clinical application and experience.

The study of groups:

Group1: Calcium hydroxide-based antibacterial dressing - two session root canal treatment Group2: aPDT - one session root canal treatment Microbiological measurement. Filled with sterile PBS, the root canals were sampled immediately before and after the disinfection procedures.

Inclusion Criteria:

Good general health, without syndromes or chronic systemic diseases; tooth with single root canal; a diagnosis of chronic periapical periodontitis; the lesions of the root tip was less than 6mm; recently (3months)did not take antibiotics.

Exclusion Criteria:

Refused to sign the informed consent document; systemic condition; uncooperative behavior; periodontal-endodontic lesions; allergic to photosensitizer; root apical absorption or destroy; A root canal anatomy of risk factors for the difficulty score ≧ 2