Question

A 5 year old child has his primary second molar missing bilaterally. Which space maintainer would be indicated in this case:

• A. Unilateral band and loop
• B. Bilateral band and loop
• C. Lingual arch
• D. Removable acrylic space maintainer

Hint:

Unilateral loss → Band and loopBilateral loss → Lingual arch (mandible) or transpalatal arch (maxilla).

Answer 1

The Correct Option is C

Step 1: Understanding the clinical situation.
The child is 5 years old and has bilateral loss of primary second molarsLoss of these teeth can result in mesial migration of permanent first molars leading to space loss
Step 2: Determine type of space loss.
Since the missing teeth are bilateral, a unilateral appliance like band and loop will not be sufficientA bilateral fixed appliance is required to maintain arch length
Step 3: Evaluation of options.
(A) Unilateral band and loop: Indicated for single tooth loss on one side only
(B) Bilateral band and loop: Not commonly used as a standard bilateral design
(C) Lingual arch: A bilateral fixed space maintainerUsed in mandibular arch after eruption of permanent incisorsIt effectively prevents mesial drift of molars
(D) Removable acrylic space maintainer: Depends heavily on patient complianceNot ideal for young children
Step 4: Conclusion.
For bilateral loss of primary second molars, a lingual arch is the most appropriate space maintainer