What is a unique feature of resin infiltration technique regarding its sensitivity?

The unique feature of the resin infiltration technique regarding its sensitivity lies in its requirement for special conditioning of the tooth surface. This technique is designed to treat early carious lesions by infiltrating the resin into demineralized enamel. The process begins with a specific conditioning step that typically involves the application of an acid etchant. This prepares the surface of the tooth by creating a micro-porous structure that allows for optimal penetration of the resin material into the enamel.

The conditioning step is crucial as it enhances the adhesion of the resin to the tooth structure, which is key to the effectiveness of the infiltration process. This meticulous conditioning makes the resin infiltration technique more sensitive to the preparation of the tooth surface compared to other methods that may not require such precise steps.

In contrast, the other options do not accurately reflect the essence of resin infiltration. The technique is indeed sensitive as it requires particular attention during conditioning to ensure success. It is not less technique sensitive; rather, the effectiveness hinges on the quality of the surface preparation. Additionally, resin infiltration relies on specific materials and equipment that are integral to the process, dismissing the idea that it can be performed without them or that it requires more equipment than traditional techniques.