Table 1.
Comparison of the study characteristics
| Study | Country | Design | Sample size | Groups |
|---|---|---|---|---|
| Alhareky 2014[16] | United States | Split-mouth RCT | 42 | Rubber dam vs Isolite system |
| Ammann 2013[17] | Germany | Parallel-group RCT | 72 | Rubber dam vs cotton roll |
| Carvalho 2010[18] | Brazil | Parallel-group RCT | 232 | Rubber dam vs cotton roll |
| Kemoli 2010[19] | Kenya | Parallel-group RCT | 804 | Rubber dam vs cotton roll |
| Loguercio 2015[20] | Brazil | Split-mouth RCT | 30 | Rubber dam vs cotton roll |
| Ma 2012[21] | China | parallel-group RCT | 162 | Rubber dam vs cotton roll |