Effect of Diode Laser on Sensitive NCCLs Prior to Composite Restoration, Dentin Bonding, and Clinical Durability of Composite Restorations.

Effect of Low-Level Diode Laser on Dentin Topography And Sensitive Non-Carious Cervical Lesions Prior to Composite Restoration, And Dentin Bonding And Clinical Durability of Composite Restorations (A Two Year Split-mouth Randomized Controlled Trial)

This study will investigate the efficacy of three diode laser wavelengths 445 nm, 660 nm, 970 nm when applied just before placement of composite restoration on reducing postoperative sensitivity from Non-carious cervical lesions (NCCLs) with class V cavity preparation.

In this randomized clinical trial, patients with NCCLs will be included (four teeth in each participant). After class V cavity preparation in the NCCLs, the teeth will be randomly assigned into four groups according to diode laser irradiation wavelength Group 1 (placebo) laser simulation and Group 2 (445 nm) diode laser wavelength, Group 3 (660 nm) diode laser wavelength, and Group 4 (970 nm) diode laser wavelength. Following laser irradiation, the universal self-etch adhesive will be applied and all the cavities will be restored with the same resin composite. Tooth sensitivity to a cold stimulus will be recorded using a visual analogue scale (VAS) before treatment and on follow-up days 1, 14 followed by 1, 3, and 6 month after treatment.

Inclusion Criteria:

1. NCCLs on the Buccal Surface of Teeth, Maxilla, or Mandible.
2. Preoperative VAS Score > 2.
3. Good Oral Hygiene. Score (0-1.2).
4. Teeth Must be Vital.

Exclusion Criteria:

1. Teeth with a History of Trauma, Dental caries, Defective Restoration, Pulpitis, Occlusal Restoration.
2. Teeth with Periodontal Disease or History of Surgical Procedure.
3. Use of Desensitizing Toothpaste or Solutions in the Past 3 Month.
4. Patients Taking Analgesics within 72 h Before Sensitivity Testing.
5. Patients with Known Allergic Reactions Against Any Material to be Used.
6. Patients with a History of Psychological Diseases and those Taking Antipsychotic Medications.
7. Pregnancy or Nursing.
8. Unwillingness of the Patient to the Treatment Procedure.