For which type of cavity preparation is the air abrasion unit typically used?

The air abrasion unit is typically used for Class I and Class VI cavities due to its effectiveness in removing small areas of decay and preparing the tooth surface without the need for a traditional drilling approach. Class I cavities occur in pits and fissures of the teeth, while Class VI cavities affect the cusp tips due to wear or decay. Air abrasion is advantageous for these types of preparations as it is less invasive and can preserve more of the surrounding healthy tooth structure. Furthermore, it often causes less discomfort for the patient compared to conventional drilling methods. This technique allows for a more conservative approach in dental restorations, which aligns well with the characteristics of Class I and class VI cavities where precision and minimal tooth loss are paramount.