A matrix retainer and band properly placed exhibit all of the following EXCEPT:

The proper placement of a matrix retainer and band is critical for effective dental restoration, particularly when it comes to achieving the right contours and contacts in the final restoration. The placement of the open slots of the matrix retainer is a significant detail, as it should indeed be oriented in a way that allows for optimal adaptation to the tooth structure.

When the open slots of the retainer are positioned towards the occlusal surface, it aids in the proper flow and placement of the restorative material, ensuring that it fills the matrix correctly and adheres to the tooth structure without any gaps. This orientation helps maintain the contours and ensures a good seal around the margins of the restoration, which is essential for preventing microleakage and ensuring the longevity of the restoration.

Therefore, the statement regarding the orientation of the matrix retainer’s open slots is inconsistent with proper technique, making it the exception in this context. It emphasizes the importance of correctly training on the nuances of matrix placement, from the features of the band to the specific orientations needed for successful restorations.