Occlusion for successful class IV acid-etch restorations.

Properly placed acid-etch Class IV restorations may be dislodged due to occlusal interferences. When restoring an anterior tooth, the dentist should check the three regions of possible incisal prematurities: centric incisal contact, protrusive incisal contact, and midprotrusive incisal contact. By correcting potential problems in these regions before tooth restoration, the dentist helps to ensure longer lasting retention for the restoration.