Story Jack had no trouble xpensing his buck-tooth filing and capping. He could just pass the dental bill on to Lureen.
Screenplay Jack had no buck-tooth problems, but he did get his teeth capped in the 2003 screenplay:
128 EXT: ENNIS'S LINE CABIN: DAY:
ENNIS waits with his bedroll by a small, poor line cabin, miles from nowhere, much like the one he and ALMA had lived in when his daughters were young. SEES a pickup coming, dust on the ranch road. watches. This time, the pickup that arrives is a fancy new double-seater with lots of chrome. JACK, older, steps out, wearing sort of modish new rodeo duds and a tall white Stetson. They look at one another a moment, making sure they are still ENNIS and JACK, making sure it's still there. Embrace.
ENNIS
What'd you do, bud, strike oil?
JACK
(grins - has had his teeth capped)
Better than that. Lureen's old man dropped dead, she's
runnin' the business now. Sends me to all the fairs and
stock shows to sell them big tractors. We got the latest
thing in squeeze chutes, ought to see 'em.
(pause)
Easy life now, Ennis.
(A beat.)
JACK
(cont'd)
Come on, throw your stuff in the back. If we're goin', let's go.