Which description matches Kennedy Class IV?

Which description matches Kennedy Class IV?

• A. Bilateral posterior edentulous areas
• B. Unilateral posterior edentulous area
• C. Unilateral bounded edentulous area
• D. Single anterior edentulous area crossing midline

Answer: (D)

This question tests the Kennedy classification for removable partial dentures. The correct description is a single anterior edentulous area that crosses the midline. That means there’s one gap in the front part of the mouth, extending from one side across the midline to the other, with teeth on both sides of the gap. This pattern is specifically categorized as Class IV. Why this fits: Class IV is defined by an anterior space that spans the midline, unlike posterior-only gaps (Class I or II) or a unilateral bounded gap (Class III). The other patterns describe posterior bilateral gaps, a unilateral posterior gap, or a unilateral bounded anterior gap, which do not cross the midline.

This question tests the Kennedy classification for removable partial dentures. The correct description is a single anterior edentulous area that crosses the midline. That means there’s one gap in the front part of the mouth, extending from one side across the midline to the other, with teeth on both sides of the gap. This pattern is specifically categorized as Class IV.

Why this fits: Class IV is defined by an anterior space that spans the midline, unlike posterior-only gaps (Class I or II) or a unilateral bounded gap (Class III). The other patterns describe posterior bilateral gaps, a unilateral posterior gap, or a unilateral bounded anterior gap, which do not cross the midline.