TABLE 1.

Restorative failures for primary endodontically treated teeth three to five years after completion of treatment (N = 1,298).

TYPE OF RESTORATION FAILURE*	NO. OF FAILURES	PERCENTAGE FAILED, MEAN (95 PERCENT CI†)
Tooth Cracked or Fractured	44	3.4 (2.4–4.4)
Restoration Replaced	57	4.4 (3.3–5.5)
Restoration Needs Replacement	80	6.2 (4.9–7.5)
Total No. of Restoration Failures	181	13.9 (12.1–15.8)

^*The subcategories of restorative failure are mutually exclusive; a tooth was allowed to be counted as a restorative failure only once, in the sequence of outcomes as presented in the first column.

^†CI: Confidence interval.