(2)
Where Ito and Itend are the intensities at the beginning and end of the curves. The time of maximum change (tmax) was calculated by taking the derivative of the dehydration curve (dI/dt) and identifying the position of maximum change.
The purpose of this study was to develop and test a more effective clinical SWIR dehydration probe for use on occlusal surfaces and develop improved methods for analysis of the acquired dehydration curves that most effectively differentiate active from arrested lesions.