Objective: The purpose of this paper was to study the role of proteolytic enzymes in dental plaque in deciduous caries occurrence.
Methods: Fluorometry and spectrometry were used separately to determine the activities of leucine amino peptidase, dipeptidyl peptidase IV and trypsin-like proteinase in caries-positive and caries-free children.
Results: The activities of the three enzymes in dental plaque in different children were same (P > 0.05).
Conclusion: The three enzymes may be not related to deciduous caries.