Okay, let's tackle this question about enamel spindles. The question is asking which cells form them. I remember that enamel is formed by ameloblasts. But wait, there's also odontoblasts involved in dentin. Maybe the answer is ameloblasts. Wait, enamel spindles are those structures that connect enamel to dentin. Oh right, they're called Tomes' processes. Wait, no, Tomes' processes are the projections from ameloblasts into the enamel. Enamel spindles are the ones that go into the dentin. So maybe they're formed by odontoblasts? Or is it the other way around?

Let me think. Ameloblasts are responsible for enamel formation. They create the enamel matrix. During this process, their processes might extend into the dentin. Wait, but dentin is formed by odontoblasts. So enamel spindles are actually dentin structures? Wait, no. Enamel is the outer layer, then comes the dentin. Enamel spindles are part of the enamel that extend into the dentin. So the cells that form enamel would be ameloblasts. But the spindles themselves... Hmm. Wait, maybe the answer is odontoblasts. Because they form dentin, which is adjacent to enamel. But the question is about enamel spindles. Maybe I'm confused here.

Wait, I think enamel spindles are also called dentinal spindles. Or maybe they're the same structure. Let me recall. Tomes' processes are part of ameloblasts, which form enamel. Enamel spindles, perhaps, are the result of ameloblasts extending into the dentin. But I'm not sure. Wait, another thought: during enamel formation, the ameloblasts leave behind structures called enamel spindles in the dentin. So the spindles are in the dentin, but formed by ameloblasts. So the answer would be ameloblasts.

Alternatively, maybe it's the odontoblasts that form spindles in the enamel. But that doesn't make sense because odontoblasts form dentin. I think the correct answer is ameloblasts. Let me confirm. Enamel spindles are also known as dentinal spindles, and they are formed by the ameloblasts. These are the processes that extend into the dentin and are left behind after enamel formation. So the answer should be ameloblasts. Therefore, the correct option would be the one that says ameloblasts.

**Core Concept**
Enamel spindles are histological structures formed during enamelogenesis, representing the remnants of ameloblast processes that extend into the dentin-enamel junction. This process is part of the morphogenesis of tooth development, specifically involving the interaction between ameloblasts and the underlying dentin-forming odontoblasts.

**Why the Correct Answer is Right**
Ameloblasts are the epithelial cells responsible for secreting the organic matrix of enamel. During enamel formation, ameloblasts develop lateral processes called **Tomes’ processes**, which synthesize and secrete enamel matrix proteins. As these processes extend into the

✓ Correct Answer: C. Odontoblasts