This is a split-mouth, randomized clinical study that evaluating the 36-month performance of different restorative materials in the treatment of root caries lesions. A total of 110 restorations were randomly placed, half using resin composite (Spectrum TPH3) and the other half using the resin-modified glass ionomer cement (Riva Light Cure). Restorations were evaluated at the baseline, 6, 12, 18,24 and 36 months according to the USPHS criteria.

The aim of the study was to comparatively assess the 36-month clinical performance of a micro hybrid resin composite and resin-modified glass ionomer cement in root caries lesions.

Thirty-three patients with at least two root caries lesions participated in this study. A total of 110 restorations were randomly placed, half using resin composite (Spectrum TPH3) and the other half using the resin-modified glass ionomer cement (Riva Light Cure). Restorations were evaluated at the baseline, 6, 12, 18, 24 and 36 months. The data were analyzed with Pearson's Chi-square, Cochran's Q, Friedman tests and Logistic Regression Analysis (p=0.05).

Inclusion Criteria:

• Root caries lesions (at least 1mm depth)

Exclusion Criteria:

• Complex medical history
• Poor dental hygiene/infrequent practise of oral hygiene habits
• Severe or chronic periodontitis
• Extreme carious activity
• Heavy bruxism
• Very deep (closer than 0.5 mm to the pulp) or superficial lesions (shallower than 1mm)
• Previously restored and abutment teeth for bridge or removable dental prostheses