Introduction:

Rubber dam isolation is a dental procedure that ensures biosafety and the quality of restorative treatments; however, no appropriate tool is available to evaluate the topic in Peruvian reality.

Objective:

Design and validate a scale to evaluate the attitude of Peruvian dentists toward rubber dam isolation.

Methods:

An instrumental cross-sectional study was conducted. The scale was applied through a virtual questionnaire and then distributed on social networks to 279 dentists (143 women and 136 men) selected by intentional nonprobability sampling. Age ranged from 22 to 67 years.

Results:

Aiken's V coefficient values were favorable for all items. Exploratory factor analysis showed the presence of a single factor. Confirmatory factor analysis suggested deletion of items 1 and 7. Reliability of the scale proved to be good. It was estimated with a Cronbach's α coefficient of 0.71.

Conclusions:

The scale about attitudes of Peruvian dentists toward rubber dam isolation (Act-AA-Cov19) is a brief, valid and reliable measurement which may be used for research purposes.

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