Chlorhexidine as Coadjuvant in Dentin Adhesion of Noncarious Cervical Lesions

Chlorhexidine as Coadjuvant in Dentin Adhesion of Noncarious Cervical Lesions and Failure-prognostic Variables: A Randomized Controlled Trial

This study aims to evaluate the effect of chlorhexidine digluconate (CRX) application in etched dentin on the retention of noncarious cervical lesions restorations.

A randomized controlled split-mouth and blind trial will be carried out. Patients with at least two non-carious cervical lesions (NCL) will be selected. NCL will be randomly assigned according the type of teeth (incisors, canine or pre-molars) into two groups: control or experimental group (application of 2% CRX for 60 seconds after the acid etching procedure). Class V restorations will be performed out with an etch-and-rinse adhesive system (Adper Single Bond 2-3M ESPE) and a composite resin (Filtek Z350-3M ESPE) according the manufacture instructions, by previously trained operators. The restorations will be evaluated by a calibrate examiner at 1 week (baseline), and 6-month, 12-month and 24-month, using the World Dental Federation (FDI) criteria. The outcome is retention of the restoration.

Inclusion Criteria:

• Patients presenting at least two non-carious cervical lesions (NCL) in anterior, canine or pre-molars;
• Patients who had more than 20 teeth in the mouth;
• Patients who were at least 18 years of age at the time of treatment and capable to understand and sign the written informed consent;
• NCL with at least 1 mm of depth in a vital permanent incisor, canine or premolar of the upper as the lower jaw.
• NCL in the facial surface of the teeth with sometimes a small part extending interproximally;
• Patients with good periodontal heath.

Exclusion Criteria:

• Patients with smoking habits, practicing bruxism, severe systemic diseases, using active orthodontic treatment, malocclusion (Angle Class II or Class III);
• Tooth with the NCL with the absent of antagonist;
• NCL wear facets upper than 50% of the incisal/occlusion surface, as a result of tooth attrition;
• Presence of caries or restorations in the area to be treated;
• Full-mouth visible plaque index (VPI) or full-mouth gingival bleeding index upper than 20%, probing depth and clinical attachment loss values exceeding 4 mm with bleeding on probing;
• Unwillingness to return for follow-ups or refuse to participate.