Table 2.

Treatment failures by type and arm at 36-month follow-up (n = 131)

	Outcome criteria
	Success	Minor failure	Major failure	Lost to follow-up
ART	23 (35%)	28 (43%)a,b	5 (8%)d	9 (14%)
HT	54 (82%)	1 (1.5%)c	1 (1.5%)d	10 (15%)

^aRestoration fracture/wear ≥ 0.5 mm—intervention required = 4 (6%)

^bRestoration loss—tooth can be re-restored = 24 (37%)

^cCrown loss—tooth can be re-restored

^dIrreversible pulpitis, dental abscess or fistula—requires pulpotomy or extraction