| Study | Reason for exclusion |
|---|---|
| Abdel‐Aziz 1999 | Not an RCT |
| Aktoren 2000 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Ansari 2009 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Ayrton 1969 | Not an RCT |
| Badzian‐Kobos 1967 | Not an RCT |
| Barcelos 2011 | Biomaterials not compared |
| Beaver 1966 | Not an RCT |
| Berrebi 2009 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Boggs 1969 | Not an RCT |
| Brannstrom 1979 | Human and dog permanent teeth. In vitro study |
| Casas 2003 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Chien 2001 | Not an RCT |
| Cuisia 2001 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Damle 1999 | Not an RCT |
| Droter 1967 | Review |
| Einwag 1991 | Not an RCT |
| Elomaa 1974 | Not an RCT |
| Fuks 2000 | Abstract only. Insufficient information presented. Attempts to obtain further information from the authors were unsuccessful |
| Grivu 1966 | Not an RCT |
| Hannah 1972 | Not an RCT |
| Hansen 1971 | Not an RCT |
| Hartsook 1966 | Review |
| Ibricevic 2001 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Kalaskar 2004 | Not an RCT |
| Keszler 1987 | Not an RCT |
| Kouri 1969 | Not an RCT |
| Liu 2003 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Liu 2006 | Not an RCT |
| Lourenço 2015 | Duplicate |
| Louwakul 2011 | Biomaterials not compared |
| Mani 1999 | Not an RCT |
| Massler 1968 | Not an RCT |
| Mejare 1979 | Restorative dentistry |
| NCT01622153 | Ongoing trial comparing pulpotomy formocresol with electrical pulpotomy, which was terminated because use of one of the materials was discontinued |
| Odabas 2007 | Not an RCT |
| Percinoto 2006 | Not an RCT |
| Punwani 1993 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Ram 2001 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Ravn 1968 | Not an RCT |
| Reddy 1996 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Redig 1968 | Not an RCT |
| Riccioli 1971 | Case report |
| Ripa 1971 | Review |
| Ritwik 2003 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Rivera 2003 | Not an RCT |
| Rocha 1999 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Rule 1966 | Case report |
| Sargenti 1975 | Review |
| Sayegh 1967 | Not an RCT. Intact human teeth |
| Sogbe de Agell 1989 | Not an RCT |
| Szabo 1968 | Abstract only. Insufficient information presented. Attempts to contact the authors were unsuccessful |
| Tsai 1993 | Not an RCT |
| Velkova 1977 | Not an RCT |
| Yakushiji 1969 | Not an RCT |
| Yildiz 2014 | Not an RCT |
Abbreviation ‐ RCT: randomised controlled trial