0488 27-month Sealant Retention Over Ozone-treated Fissure Caries
L. STEIER, Spezialist fur Prothetik der DGZPW, Mayen, Germany, G. STEIER, Tufts University, Boston, MA, USA, and E. LYNCH, Queens University Belfast, Northern Ireland, Uk

Ozone is recommended combined with a “bonded” flowable composite resin sealant (FCS) as a conservative treatment option for early non-cavitated primary occlusal pit and fissure caries (PFC) which are not visible on bitewing radiographic examination . Objectives: To test the short term retention and quality of occlusal FCS's applied over Ozone treated PFC lesions, assessed by the Modified US Public Health Service (USPHS) criteria in a longitudinal controlled clinical trial. Methods: 2 permanent teeth with non-cavitated PFC lesions were enrolled in each of 73 subjects. Teeth were cleaned (Prophyflex 2®, KaVo, Germany) and the following were recorded: clinical severity (Ekstrands index) and DIAGNOdent® (KaVo). After randomisation, 73 lesions in 73 subjects were treated with Ozone for 40 seconds (HealOzone unit, KaVo), followed by acid etching (15 s , 35% phosphoric acid), washing and drying, adhesive placement (Optibond FL, KerrHawe), followed by use of FCS (Point 4 Flowable, KerrHawe). The other 73 lesions were reserved for FCSs only without Ozone. FCSs in both groups were examined after 27 months using the 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). 65 subjects attended the 15 month recall visit. Retention at the 15-month recall visit was not different between groups (p>0.05). 2 sealants in the control group were lost completely whilst 10 had chipping at the margins. None were lost completely in the treatment group and 7 had marginal chipping. At 15 months, there were no significant differences between the groups in terms of FCS retention, marginal discoloration, FS color and secondary caries at any of the recall visits (p>0.05). Conclusion: Ozone treatment had not affected retention of flowable composite resin sealants occlusally in-vivo. Further recalls should be made for the evaluation of long term retention.

Seq #70 - Caries Prevalence/Removal/Prevention
2:00 PM-3:00 PM, Thursday, 9 March 2006 Dolphin Hotel Pacific Hall

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