When preparing for a class II restoration, what is checked to ensure the proper cavity preparation?

When preparing for a Class II restoration, checking the shape and outline of the cavity preparation is essential to ensure that it adheres to the principles of cavity design. The shape and outline affect how well the restoration will fit and bond to the natural tooth structure, as well as how it will function under occlusion. Properly designed contours not only allow for optimal material placement but also contribute to the long-term success of the restoration by preventing stress concentration and facilitating easy cleaning.

Ensuring that the cavity preparation has the right shape and outline can help in managing gingival health, maintaining the integrity of remaining tooth structure, and promoting patient comfort. Additionally, it aids in preventing future decay by enabling effective oral hygiene practices around the restored area.

While checking the depth of the preparation, the presence of decay, and the angle of the margins are also important, they primarily serve as steps in the process of cavity preparation rather than being the primary focus when considering the overall success of the restoration in relation to its final shape and outline.