What is the recommended approach to restoring a Class II preparation on a tooth with strong proximal contact using a matrix and wedges?

• A. Use a sectional matrix to recreate the contact and ensure a tight seal with proper wedges.
• B. Use a circumferential matrix with no wedges.
• C. Avoid wedges; margins will seal by condensation.
• D. Use a pin-retained matrix system.

Answer: (A)

When restoring a Class II with a strong proximal contact, the goal is to recreate that contact precisely and seal the proximal margins well. A sectional matrix is ideal here because its precontoured band fits between the teeth and, with a separating ring, gently separates the teeth enough to form a true proximal contact. Using proper wedges is essential because they adapt the matrix to the gingival margin, help wipe excess composite, and prevent gaps or overhangs at the margin. Together, the sectional matrix and wedges create a tight, anatomically correct contact and a reliable seal.

Using a circumferential matrix can make it harder to reproduce a precise proximal contact in areas with strong contacts and may lead to improper contour or overhang if not managed perfectly. Skipping wedges or relying on condensation alone won’t reliably seal the margins, increasing the risk of microleakage. A pin-retained matrix system is useful in cases with insufficient tooth structure for retention, but it isn’t the preferred method for recreating a tight proximal contact in a tooth with a strong existing contact.