13. Pulpotomy (ProRoot MTA) versus pulpotomy (RetroMTA).

Outcome	Time point (months)	No. of studies	Risk ratio (95% CI)
Clinical failure	6 and 12	1	Not estimable*
Radiological failure	6 and 12	1	0.35 (0.04, 3.22)
Pain	6 and 12	1	Not estimable*
Soft tissue pathology	6 and 12	1	Not estimable*
Pathologic mobility	6 and 12	1	Not estimable*
Pathologic radiolucency	6 and 12	1	0.35 (0.01, 8.32)
Pathologic root resorption	6 and 12	1	0.35 (0.04, 3.22)

*due to lack of events

Abbreviation: CI: confidence interval.