Green’s Dictionary of Slang

tusk n.

also tush
[SE elephant’s tusk]

(US Und.) a tooth; thus tusk-box n., a mouth.

[UK]A. Tennyson Devil and the Lady (1930) III i 55: I’ll [...] uncork The claret of your nob, and dim your daylights, And make your ivories chatter in the tusk-box.
[US]Lafayette Advertiser (LA) 12 Apr. 4/2: With a grunt of satisfaction he bit into the dainty morsel, while his ‘tushes’ sank deep in.
[US]G. Bronson-Howard God’s Man 365: ‘He won’t smile in a hurry,’ said Pink with a vicious grin. ‘Not until the dentist puts in four front tusks, he won’t.’.
[US]W.R. Burnett Goodbye to the Past 58: ‘Must remember to call up Doc Spence, and get these tusks yanked out’.
[UK](con. 1912) B. Marshall George Brown’s Schooldays 25: Bruiser’s tusks were going like pistons.

In compounds

tusk-hoister (n.)

(US) a dentist.

[US]Perrysburg Jrnl (OH) 6 May 4/1: The dentist has received the title of ‘tusk-hoister’ and ‘tooth carpenter’.
tusk jerker (n.)

(Aus.) a dentist.

[Aus]Raleigh Sun (Bellingen, NSW) 24 Mar. 4/5: The Tonsorial Artist v. The Tusk Jerker were the next to prat their hideous frames up to the green.
tusk tussler (n.)

(Aus.) a dentist.

[Aus]Sydney Sportsman (Surry Hills, NSW) 2 Nov. 2/3: Ernest-Pitts, one time tusk tussler, is going to America.