When preparing primary molars for stainless steel crowns, how should the depth of proximal surface reduction compare to the buccal and lingual surfaces?

When preparing primary molars for stainless steel crowns, the depth of proximal surface reduction is purposefully greater than that of the buccal and lingual surfaces. This approach is essential for facilitating the proper seating of the crown over the tooth structure. The increased reduction on the proximal surfaces allows the crown to pass effectively through the contact area with adjacent teeth, which is critical for achieving a tight fit and preventing issues such as food impaction or misalignment.

Typically, the preparation process focuses on ensuring that the crown can not only fit over the prepared tooth but also maintain ideal contact points with nearby teeth. Proximal surface reductions are thus designed with functional considerations in mind, emphasizing the need to manage interproximal spaces effectively. By making the proximal reductions deeper, practitioners can achieve better retention and avoid potential complications after the crown is placed.