Describe the Hall technique and its purpose in MID.

• A. Sealing a primary molar after caries removal.
• B. Drilling and filling with composite after caries removal.
• C. Sealing a primary molar with a stainless steel crown after caries removal.
• D. Sealing a primary molar with a stainless steel crown without caries removal to arrest decay and preserve vitality.

Answer: (D)

The Hall technique is a minimally invasive approach that seals a carious primary molar under a preformed stainless steel crown without removing decayed tissue. By sealing the decay beneath the crown, the environment around the caries is deprived of nutrients and bacteria, which helps arrest the decay while the tooth’s vitality is preserved. This method is especially helpful for young children who are difficult to manage with traditional drilling and filling, because it avoids anesthesia and tooth preparation. The crown is simply fitted and cemented to create a tight seal, allowing the tooth to function normally and stay alive as long as there are no signs of irreversible pulpitis or acute infection.