華嚴經探玄記 15.88

15.88

第八齒，有一相，梵言金慕耆婆。一齒間不容一毫者，此云頸旋螺文，則佛齒形狀也。「放大光」下明業用利益。《智論》齒有四十，不多不少。齊密無麁細，人不知者。

The eighth: the teeth have one mark, called jinmuqipo in Sanskrit. 'Between the teeth not admitting a single hair' translates here as 'spiraling conch pattern on the neck', which is the shape of the Buddha's teeth. From 'emitting great light' down clarifies the karmic function and benefit. The Dà zhìdù lùn states that the teeth are forty, neither more nor less. They are even, close-set, without coarseness or thinness, which humans cannot know.