Noorollahian 2008.

Methods	RCT, parallel‐arm Teeth randomly assigned Conducted in the Paediatric Dentistry Department, Faculty of Dentistry, Zahedan University of Medical Sciences, Iran. Operators not mentioned
Participants	46 children, 60 teeth, mean age 6.1 years, age range 5 to 7 years
Interventions	Group 1:Pulpotomy (formocresol); n = 30 (1 visit) Rubber dam Caries removal prior to pulpal access not mentioned Pulp access with high‐speed bur Pulpotomy amputation not mentioned For haemostasis, no precision No irrigation Cotton wool pellet soaked with FC placed on pulp stumps for 5 minutes after pulpotomy, followed by ZOE before being restored with stainless‐steel crown Group 2:Pulpotomy (MTA); n = 30 (2 visits) Rubber dam Caries removal prior to pulpal access not mentioned Pulp access with high‐speed bur Pulpotomy amputation not mentioned For haemostasis, no precision No irrigation MTA (3:1 powder:water ratio) applied after pulpotomy. A cotton pellet moistened with normal saline was placed over the MTA paste and the tooth was temporarily restored using ZOE. Then ZOE before being restored with stainless‐steel crown after 24 hours
Outcomes	Clinical success (no pain symptoms, no tenderness of percussion, no swelling, no fistulation or no pathological mobility), radiological success (no evidence of radicular radiolucency, no internal or external root resorption or no periodontal ligament space widening), signs of failure (internal root resorption, furcation radiolucency, periapical bone destruction, pain, swelling or sinus tract), furcation involvement, pulp canal obliteration: evaluation at 6, 12 and 24 months (at tooth level)
Notes	Dropouts: at 24 months "12 out of 30 teeth in the two groups", no reasons stated Source of funding: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random number table
Allocation concealment (selection bias)	Unclear risk	Insufficient information to make a clear judgement
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Insufficient information to make a clear judgement
Blinding of clinical outcomes assessment	Low risk	Quote: "...the children were examined clinically by the author who was blind to which treatment group the subject belonged"
Blinding of radiological outcomes assessment	Low risk	Quote: "...the children were examined radiographically by the author who was blind to which treatment group the subject belonged"
Incomplete outcome data (attrition bias) All outcomes	High risk	Proportion of missing outcomes > 10% children randomly assigned
Selective reporting (reporting bias)	Unclear risk	Insufficient information to make a clear judgement