In Genesis 49:12, "teeth whiter than milk" signify the Celestial Spiritual [milk] in the Lord's Natural [teeth], where Judah is here representing the Lord. (Arcana Coelestia 2184-2185).

In Psalms 3:7; 37:12, 58:6; Matthew 8:12, teeth signify the lowest natural things in man: in the genuine sense, their truths, in the opposite sense, their falsities. So the gnashing of teeth signifies the collision of falsities with truths. (Arcana Coelestia 4424[3])

In Exodus 21:27, this signifies truth in the natural, here the ultimate, which is the sensuous. (Arcana Coelestia 9062)

The tooth signifies the corporeal proprium, which is the lowest degree of man. (Arcana Coelestia 10283[12])

'Teeth,' as in Genesis 49:12, in the genuine sense, signify the natural level of life. Any hard part of the body, like bones and cartilage, corresponds to the truths and goods of the lowest natural level. 'Teeth' signify the outer edges of the life of the natural self, or the sensory level. There is a natural sensory will, and a natural sensory understanding. When the sensory levels are separated from the interior of the mind, their supposed truths are really mere falsities, and do violence to truths and destroy them. This situation appears in many passages, because sensory people do not see any truth in its own light, but engage in reasoning and altercations about everything... These altercations are heard in the hells as the gnashing of teeth. Viewed in itself, this is the collision of falsity and truth. This is the meaning of 'gnashing of teeth' in Matthew 8:12, 13:42, 50, 22:13, 24:51, 25:30, and Luke 13:28.

(सन्दर्भ: Apocalypse Revealed 435)

9062. 'And if he strikes out the tooth of his male slave or the tooth of his female slave' means if it destroys truth or the affection for it on the level of the senses. This is clear from the meaning of 'tooth' as the outer part of the understanding, and therefore truth in the natural, dealt with above in 9052, at this point truth on the lowest level of the natural, that is, the level of the senses, since it is speaking about a male slave and a female slave; from the meaning of 'female slave' as an affection for that truth, also dealt with above, in 9059; and from the meaning of 'striking out' as destroying. What the sensory level is, and what it is like, see 4009, 5077, 5081, 5084, 5089, 5094, 5125, 5128, 5580, 5767, 5774, 6183, 6201, 6310, 6311, 6313, 6315, 6316, 6564, 6598, 6612, 6614, 6622, 6624, 6948, 6949, 7693.