Table 1. Characteristics of included studies.

Characteristics of RCTs	Number of RCTs (%)n = 47
Publication year
<2000	5 (11%)
2000–2004	8 (17%)
2005–2009	23 (49%)
2010–2012	11 (23%)
Risk of bias
Low risk	1 (2%)
High risk	19 (40%)
Unclear	27 (57%)
Number of randomly allocated teeth
Median [25–75% percentile], [min–max]	68 [50–100], [30–291]
Number of arms
2	33 (70%)
3	8 (17%)
4	5 (11%)
5	1 (2%)
Treatments compared
Pulpotomy vs pulpectomy*	2 (4%)
Pulpotomy vs pulpotomy	33 (70%)
Pulpectomy vs pulpectomy	8 (17%)
Direct vs indirect pulp capping	4 (9%)
Follow-up time
Fixed duration of follow-up†	38 (81%)
3 months	15 (32%)
6 months	33 (70%)
9 months	6 (13%)
12 months	26 (55%)
18 months	11 (23%)
24 months	14 (30%)
36 months	1 (2%)
Variable duration of follow-up	9 (19%)

RCT, randomized controlled trial;

^*biomaterials were always different;

^†numbers do not add to 100% because several time points could be reported in each trial.