• Siwaporn Suksawang D.D.S., M.D.Sc
• Wacharaporn Tasachan D.D.S., Cert. of fellowship in Pedodontics, Diplomate, Thai Board of Pediatric Dentistry
• Chaiwat Maneenut D.D.S., M.D.Sc., Ph.D., Diplomate, Thai Board of Operative Dentistry

Objective The purpose of this in vitro study was to compare effectiveness of 1.23% acidulated
phosphate fluoride gel, 0.1% fluoride varnish and 0.11% fluoride toothpaste on remineralization of
artificial white spot lesion in deciduous teeth.

Materials and methods The samples were 30 deciduous molars which were bucco-lingual
longitudinally sectioned into 30 pairs. One half from each tooth was used as the control specimen
and the another was used as the tested specimen. Artificial white spot lesions were created on
all specimens and were randomly divided into three groups of 10 pairs each. Group 1: tested specimens
were applied by four-minute of acidulated phosphate fluoride gel, group 2: tested specimens were
applied by fluoride varnish one minute and group 3: tested specimens were immersed in fluoride
toothpaste two times/day. All groups were pH-cycled for 14 days. Polarized light microscope was
used to evaluate lesion area.

Results It was found that lesion areas in tested specimens and control specimens of all three tested
groups were statistically different from the controls (p < 0.01). The lesion area in the tested specimens
decreased, whereas the lesion area in the control specimens increased. However, there was no statistical
difference in the reduction of the lesion area among the tested groups (p > 0.22) whose beginning
lesion area was not statistically different (p > 0.17).

Conclusion It can be concluded that the three topical fluorides are effective on remineralization
of white spot lesion in deciduous teeth.

(CU Dent J. 2007;30:169-80)