Group 3:

- Cavities type O in premolars and molars with a wall thickness of less than 20% of the diameter of the crown of the tooth;
- Cavities type OM (OD), MOD with a defeat of one supporting cusp in molars;
- Cavities type OM (OD), MOD in premolars and molars with preservation of wall thicknesses less than 20% of the diameter of the crown of the tooth;
- Cavities on incisors with a lesion of 1/3 to ½ length of the cutting edge;
- Cavities on incisors and fangs with lesion of the vestibular tooth surface up to 1/2 of the crown width;
- horizontal tooth defeat to 1/3 crown height;