**Core Concept**
Tetracycline staining is a common dental condition characterized by the yellowish discoloration of teeth due to the deposition of tetracycline antibiotics during tooth development. This condition is challenging to treat and requires careful planning before initiating any restorative procedures.

**Why the Correct Answer is Right**
The correct answer is based on the principle that bleaching agents can weaken the bonding of composite restorations to tooth enamel. Therefore, it is essential to wait for a sufficient period after bleaching to ensure that the tooth surface is stable and able to support the composite restoration. The recommended waiting period is usually 2-4 weeks, but it can vary depending on the type and concentration of the bleaching agent used.

**Why Each Wrong Option is Incorrect**
**Option A:** 1 week - This waiting period is insufficient for the tooth surface to stabilize after bleaching, which can lead to poor bonding of the composite restoration.
**Option B:** 6 months - This waiting period is excessive and not supported by scientific evidence, making it an incorrect choice.
**Option C:** 1 month - This waiting period is not universally accepted and may not be sufficient for all types of bleaching agents, making it an incorrect choice.

**Clinical Pearl / High-Yield Fact**
It is essential to consider the type of tetracycline staining, the duration of the staining, and the patient's overall oral health when planning restorative procedures. A thorough examination and consultation with a specialist may be necessary to determine the best course of treatment.

**Correct Answer:** B. 6 months