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Research

Restoration of ART and Ozone treated primary root carious lesions
By Julian Holmes
Queen's University of Belfast, United Kingdom
Objectives: This study assessed placement time required and durability of restorations placed on ART and Ozone treated primary root carious lesions (PRCL) in the most severe category (J Dent Res 1993;73: 623-629) compared to conventional treatment. A previous study showed that 100% caries reversal with ozone treated PRCL’s can be obtained (Gerodontology, 2003: 20, 106-114) in the middle severity lesion group 2.

Methods: 60 subjects, each with 2 soft PRCL were selected. After randomisation, each subject had one PRCL made caries free using conventional local analgesia (LA), drilling and filling using Optibond Solo Plus and Point 4 (KerrHawe) composite resin. 11 pulp exposures were detected during cavity preparation and RCT was also performed on these teeth. The remaining 60 PRCL in the 60 subjects received only the ART technique and Ozone treatment for 20 seconds (HealOzone, KaVo) without LA, followed by filling using Optibond Solo Plus and Point 4.. Up to 1 mm of softened carious dentine was left overlying the pulpal floor prior to Ozone treatment. The mean (SD) time required for ART, Ozone treatment and placement of a restoration was 10 (2) minutes, whilst the conventional technique, including LA, required 23 (4) minutes (P<0.05).

Results:
After 18 months, 56 subjects returned for recall. 100% of all restorations scored alpha in every recorded USPHS criteria. All restorations were scored aesthetically as excellent in appearance in 100% of cases. However, an additional 4 teeth in the conventional treatment group had required RCT in the intervening 18 months. 25% of the conventionally treated teeth required RCT whilst none of the ART and Ozone treated teeth required RCT (P<0.01).

Conclusions: ART and Ozone treatment saves time and reduces the need for RCT compared to conventional drilling and filling techniques for treating soft PRCL.

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