0844 Fissure Sealant Retention over Ozone-Treated Occlusal Caries: 12-Months Results
L.A. ABU-NABA'A, Jordan University of Science and Technology, Irbid, Jordan, H.M. AL SHORMAN, Queen's University of Belfast, United Kingdom, and E. LYNCH, Queen's University of Belfast, England

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. Material and Methods: non-cavitated PFC lesions were enrolled in 53 patients. Teeth were cleaned (Prophyflex 2®, KaVo, Germany) and the following were recorded: clinical severity index [Ekstrand KR et al.: Caries Res.1998;32:247-254], DIAGNOdent® (KaVo, Germany) and ECM IV (LODE BV, Netherlands) standard-scale readings. After randomisation, 66 lesions (Tg) were Ozone-treated (10 seconds, HealOzone unit, CurOzone USA) acid etched (15 s, 35% phosphoric acid), washed and dried. An opaque FS was applied (Guardian, Kerr) and cured as recommended. The other 66 lesions were only fissure sealed (Cg) and both groups were examined at 1, 3, 6 and 12 months by USPHS criteria (Wilcoxon's Signed Ranks Test). Results: From baseline, FS colour remained stable in both groups (p>0.05). Marginal discolouration of the lesion appearing under the margins of FS was significantly lower in the Cg than Tg at baseline (p<0.05) but increased to become not significantly different from Tg at the 12-month recall (p>0.05). No significant retention differences were present between groups at any recall visit (p>0.05). None of the sealants was lost completely, while partial loss, which required no re-treatment at the 12-month recall, was 32.7% and 29.8% respectively (p>0.05). Further follow-up was planned on a 6 monthly bases. Conclusion: Ozone treatment had not affected immediate retention of fissure sealants in-vivo. Further microbiological studies should be made to test combination of ozone with FSs for treatment of minimally cavitated lesions.

Seq #109 - Sealant
2:00 PM-4:00 PM, Thursday, 10 March 2005 Baltimore Convention Center Exhibit Hall E-F

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