治疗下颚第二大臼齿远心侧的环绕型骨性破坏，是牙周病科医师的一大挑战。
Treatment of deep circumferential bony defects around the mandibular secondary molars is a great challenge to periodontist.
人类的智齿就是第三大臼齿，通常有四颗，包括下颌第三磨牙和上颌第三磨牙。
A wisdom tooth is in humans any of the usually four third molars, including mandibular third molar and maxillary third molar.
这是一颗臼齿，比任何现代人的牙齿都要大，甚至比最大的尼安德特人的牙齿还大。
The tooth, a molar, is bigger than any modern human tooth and is even bigger than the biggest Neanderthal tooth.
这是一颗臼齿，比任何现代人的牙齿都要大，甚至比最大的尼安德特人的牙齿还大。
The tooth, a molar, is bigger than any modern human tooth and is even bigger than the biggest Neanderthal tooth.
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