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. 2016 Aug 12;10:375–381. doi: 10.2174/1874210616021001375

Table 2.

Outcome parameters of the included teeth (n = 199). Percentages are given among the treatment protocols.

Parameter Protocol 1 (n = 106) Protocol 2 (n = 93) p*
Follow-up Period
(months)
3-6
>6-9
>9-12
>12-18
>18-24

36 (34.0%)
13 (12.3%)
38 (35.8%)
16 (15.1%)
3 (2.8%)

58 (62.4%)
21 (22.6%)
10 (10.8%)
4 (4.3%)
0 		 < 0.0001
PAImasterpoint
I
II
III - IV
V
PAIfollow-up
I
II
III - IV
V
32 (30.2%)
3 (2.8%)
71 (67.0%)
0 

51 (47.6%)
1 (1.0%)
51 (48.6%)
3 (2.9%)
32 (34.4%)
1 (1.1%)
60 (64.5%)
0 

54 (57.6%)
0
39 (42.4%)
0 		 0.555





0.183
success
yes**
PAIfollow-up=I
PAImasterpoint>PAIfollow-up>I
no***
extraction
77 (72.6%)
51 (48.1%)
26 (24.5%)
29 (27.4%)
3 (100%)
77 (82.8%)
54 (58.1%)
23 (24.7%)
16 (17.2%)
0 		 0.203




0.102

* = p values referring to comparison between protocol 1 and 2.

** = absence of clinical symptoms and PAIfollow-up = I or PAImasterpoint > PAIfollow-up > I

*** = clinical symptoms and/or PAImasterpoint ≤ PAIfollow-up > I

Protocol 1 = NaOCl (+ NaCl + CHX in revision cases)

Protocol 2 = NaOCl + EDTA + PUI (+ NaCl + CHX in revision cases)

(CHX = chlorhexidine, EDTA = ethylenediaminetetraacetate, NaCl = sodium chloride, NaOCl = sodium hypochlorite, PAI = periapical index, PUI = passive ultrasonic irrigation)