What considerations apply when planning a Class II amalgam restoration on a tooth with a strong proximal contact?

• A. A universal matrix is best for all contacts.
• B. Wedges are optional if matrix is tight.
• C. Use tofflemire with no wedges.
• D. A sectional matrix is preferred to recreate the contact, and proper wedges ensure a tight seal.

Answer: (D)

When planning a Class II amalgam restoration where the adjacent tooth has a strong proximal contact, the goal is to recreate a natural proximal contour and ensure a tight seal during restoration. A sectional matrix system is best for this because it isolates the preparation, allows a precisely shaped contact, and helps recreate the correct proximal width without distorting the adjacent tooth. The use of proper wedges is essential with this approach to seal the matrix against the tooth at the gingival margin and to help form a tight, continuous contact. Without wedges, the matrix may not seal well and amalgam can seep or flash, and the contact may not be adequately reproduced. Using a universal matrix or a Tofflemire with no wedges tends to struggle to recreate a tight contact in a tooth with a strong proximal contact, making sectioned matrices with wedges the preferred choice.