Philosophiae Doctor - PhDFour spectrophotometric procedures for the analysis of phosphorus were
evaluated (1F1). The phosphorus concentrations in saliva and dentine were
determined. All four analytical procedures were accurate but the one
method was the most sensitive.
An acid etch enamel biopsy procedure which was originally developed in
Switzerland was modified in our laboratory (#2). It was subsequently shown
by other investigators that the modified technique was much more accurate
for the determination of the fluoride concentration in enamel than the
original procedure
