Table 3.

Risk of bias for in vitro study

Study	Specimen Randomization	Single Operator	Operator Blinded	Control Group	Standardized Specimens	Outcome Mode	Manufacturer’s Instructions	Sample Size Calculation	ROB
Jablonski	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Gokce	Yes	No	No	Yes	Yes	Yes	No	Yes
Lena	Yes	No	No	Yes	Yes	Yes	Yes	No
Yuan	Yes	No	Yes	Yes	Yes	Yes	Yes	No
Üstün	Yes	No	No	Yes	Yes	Yes	Yes	No
Mehta	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes

According to the ROB 2 tool, the risk offset evaluation was carried out from eight aspects. Green means low risk (7–8 scores), yellow means some concern (4–6 scores), and red means high risk (1–3 scores). ROB risk of bias