Efficiency of Diode Laser Activated Irrigation on Healing of Periapical Tissues

Sample size is 24 , 24 Patients were randomly distributed in 2 groups , one group of patients received laser activated irrigation LAI during root canal treatment and the other group received no treatment just conventional RCT. • Patients were equally divided into 2 groups (n=12 in each group ) The study in a Single blinded RCT , Numbers for patients will be generated and distributed randomly in a table on an Excel sheet, and in front of each number either a letter (C) for control or (I) for intervention will be typed After patients were selected in the study they will be asked to fill in a consent form , that states that they are part of a clinical trial and that they may or may not receive a laser activated irrigation Group A LAI :Disinfection were done by using 5 ml of 2.5% sodium hypochlorite irrigation for 1 minute. Irrigation will be performed with a 30-gauge needle side vented The irrigation needles were introduced passively up to 2 mm away the working length. After irrigation Laser treatment will be performed with a diode laser, at a wavelength of 980 nm with a repeated pulse mode using a pulse duration of 5sec per canal and a pulse interval of 0.2 ms. The laser irradiation were delivered for 1 minute into the canal up to 1 mm short of the working length, with circling movements from the apical part moving towards the coronal part Group B : received mock laser intervention , conventional Root canal treatment with 2.5% sodium hypochlorite CBCT was taken pre-operative and another one was taken after 12 month , both volumetric and linear measurements were calculated

Inclusion criteria

• Adult patients age between 18-50 years
• Medically free patients.
• Patients suffering from acute or chronic infection with symptomatic apical periodontitis with Necrotic pulp
• Preoperative Pain
• Sensitivity to percussion
• Periapical radiographic X-ray showing periapical lesion with no gutta percha in canal
• Occlusal contact with opposing teeth

Exclusion criteria

• Pregnant females.
• Patients having a significant systemic disorder or history of drug abuse
• Patients who had administrated analgesics or antibiotics during the last 12 hours preoperatively.
• Patients having bruxism or clenching
• Teeth having:

• No occlusal contact
• No sensitivity to percussion
• Greater than grade I mobility.
• Pocket depth greater than 5mm.
• No possible restorability
• Procedural errors
• Previous Root canal treatment
• Open apex