Group 1:

- Cavities in the area of natural pits and fissures;
- Cavities with one and two-sided defects on incisors and fangs up to ½ of the length of the cutting edge with the preserved vestibular surface and the optimum amount of dentin on it;
- Cavities сervical area of all groups of teeth and free operational access to them.Group 2 :

- Cavities on molars and premolars of type O, with a preserved wall not less than 20% of the diameter of the crown of the tooth;

- Cavities on molars and premolars of the type OM (OD) and MOD without damage to the supporting humps and the thickness of the retained walls of not less than 20% of the diameter of the crown of the tooth;
- Cavities on incisors and fangs with a lesion of the vestibular surface to one third.