3472 6-months Fissure Sealant Retention Over Ozone- treated Occlusal Caries
L. ABU-NABA'A, Jordan University of Science and Technology, Irbid, Jordan, H.M. AL SHORMAN, Queen's University of Belfast, and E. LYNCH, Queens University Belfast

Ozone is combined with a fissure sealant (FS) as a treatment option for non-cavitated primary occlusal pit and fissure caries (PFC) in a longitudinal controlled clinical trial. Aim: To test short term retention and quality of the FSs applied over Ozone treated PFC lesions, assessed by the Modified US Public Health Service (USPHS) criteria. Methods: Permanent teeth with non-cavitated PFC lesions were enrolled in 53 patients. Teeth were cleaned (Prophyflex 2®, KaVo, Germany) and the following were recorded: clinical severity (Ekstrand KR et al, Caries Res. 1998;32:247-54.), DIAGNOdent® (KaVo, Germany) and ECM IV (LODE BV, Netherlands) standard scale readings. After randomisation, 66 lesions were treated with Ozone for 10 seconds (HealOzone unit, CurOzone USA) followed by acid etching (15 s , 35% phosphoric acid), washing and drying as recommended then an opaque FS was applied (Guardian, Kerr). The other 66 lesions were reserved for FSs only. FSs in both groups were examined at 1, 3 and 6 months by Modified USPHS criteria (Wilcoxon's Signed Ranks Test). Results: At baseline, severity of lesions in both groups was similar as measured by the diagnostic tools (p>0.05). Retention at the 1-month recall visit was not different between groups (p>0.05). 1 (1.5%) sealant in the control group was lost completely whilst 10 (15.4%) had chipping at the margins. None were lost completely in the treatment group and 10 (15.4%) had marginal chipping. At 6 months, there were no significant differences between the groups in terms of FS retention, marginal discolouration, FS colour and secondary caries at any of the recall visits (p>0.05). Conclusion: Ozone treatment had not affected immediate retention of fissure sealants in-vivo. Further recalls should be made for the evaluation of long term retention.

Seq #359 - Clinical Preventive and Restorative Studies
10:15 AM-11:30 AM, Saturday, 13 March 2004 Hawaii Convention Center Exhibit Hall 1-2

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