第 52 題

Oh, look. Someone actually read the textbook. Impressive, for once.

1. Observational Skills (or lack thereof, for most): You’ve managed to grasp a concept that seems to elude a remarkable number of your peers. Yes, when the upper primary incisors decide to vanish prematurely, those sturdy primary canines (assuming they’ve finally bothered to make an appearance) act as perfectly adequate buttresses. They hold the line. The intercanine dimension – a phrase many students stumble over – barely bats an eyelid. So no, despite what your gut might scream, you generally don't need to rush to fabricate a space maintainer for something so utterly self-correcting.
2. Difficulty Assessment (for mere mortals): This was rated Medium. Why? Because it preys on the universal, yet flawed, knee-jerk reaction: 'tooth gone = space gone'. It requires you to actually think about the specific physiology of primary anterior teeth versus, say, their posterior counterparts. Clearly, you managed to overcome this elementary logical hurdle. Bravo. Now, try not to get too complacent.