If contamination occurs during the sealant placement, what should be done?

When contamination occurs during the sealant placement, the best course of action is to re-isolate and re-etch the area for 5-10 seconds. This process is essential because contamination can significantly affect the ability of the sealant to bond properly to the tooth surface.

Re-isolating ensures that the field remains clean and free from saliva or other contaminants, which is critical for achieving a good bond. The re-etching step further prepares the tooth surface, enhancing its wettability and increasing the bond strength of the sealant. This step helps to create a proper environment for the sealant to adhere effectively, thereby ensuring its longevity and efficacy in protecting the tooth from decay.

Continuing without addressing contamination, fully removing the sealant, or only re-isolating would not adequately address the issue of contamination, potentially leading to sealant failure and compromising the protective benefits intended. Taking the steps of re-isolating and re-etching is a proactive approach to ensure the success of the sealant application.