In this study we understand what is the access cavity preparations and the error that might occur during this procedure. We also review the uptodate access cavity preparation methods. Inadequate access preparation can lead to a host of subsequent treatment issues and cause failure in the worst-case situation. Therefore, the implementation of minimally invasive dentistry is significant. Because it assists in the maximum preservation of the healthy dental issues of the patients and can prevent the common dental issues with the traditional dental access cavity preparations.