The Influence of Laser-Assisted Irrigation on Root Canal Debris Removal

Root canal cleanliness is crucial to the success of endodontic treatment, as residual debris can harbor bacteria that may cause reinfection. Laser-assisted irrigation (LAI) has emerged as a potential method to enhance debris removal within the complex anatomy of the root canal system. This study evaluates the efficacy of LAI in removing debris from root canals compared to conventional irrigation techniques.

Forty single-rooted mandibular premolars were selected and randomly divided into two groups of 20 teeth each. Group 1 was treated using conventional irrigation with sodium hypochlorite (5.25%), while Group 2 received LAI with the same irrigant. Both groups used EDTA as a final rinse. The debris remaining in the canals was evaluated under a scanning electron microscope (SEM) at three levels: coronal, middle, and apical thirds. Debris levels were quantified using a 4-point scale (0 = no debris; 1 = minimal debris; 2 = moderate debris; 3 = heavy debris).

Group 2 (LAI) showed a statistically significant reduction in debris compared to Group 1 (conventional irrigation) at all three canal levels (P < .05). Mean debris scores for Group 1 were 2.3 (coronal), 2.6 (middle), and 3.1 (apical), while Group 2 recorded scores of 1.2 (coronal), 1.4 (middle), and 2.0 (apical). LAI was particularly effective in the coronal and middle thirds, with a noticeable reduction in debris at the apical third as well, though less pronounced.

Laser-assisted irrigation significantly enhances debris removal from root canals compared to conventional methods, especially in the coronal and middle thirds. Incorporating LAI may improve the overall success of endodontic treatment by reducing bacterial load and enhancing root canal cleanliness.