What procedure should be followed to improve a weak contact on an aluminum temporary crown?

Using a burnisher to extend the contact is the most effective procedure for improving a weak contact on an aluminum temporary crown. A burnisher is a tool designed to smooth and condense dental materials, which can help enhance the contact between the crown and adjacent teeth. By applying pressure with the burnisher, the metal crown can be manipulated to create a tighter fit, improving the stability of the temporary crown in relation to the neighboring dentition.

Other methods, while they might address certain aspects of the crown's performance, do not specifically target the issue of weak contact effectively. Employing a resin bonding agent focuses on adhesion rather than mechanical fit and does not resolve issues related to the shape of the contact area. Applying a layer of wax could, in theory, address minor discrepancies but is not a durable or practical solution for a weak contact in a way that ensures long-term stability. Reshaping the crown with a dental bur could alter its overall fit or integrity, potentially leading to more complications rather than providing a simple solution to the weak contact problem. Thus, the use of a burnisher is the preferred approach in this scenario.