Korean J Orthod.  2008 Jun;38(3):214-222. 10.4041/kjod.2008.38.3.214.

Experimental brush wear pattern and cariostatic effect of Biscover

• Oh EJ
• Park SS
• Jang MJ
• Jeon YM
• Kim JG

• KMID: 1975910
• DOI: http://doi.org/10.4041/kjod.2008.38.3.214

Abstract

OBJECTIVE
The aim of this study was to investigate the experimental brush wear pattern of a light cured surface sealant, Biscover (Bisco, Schaumburg, IL), and to evaluate its cariostatic effect. METHODS: Caries- free human premolars were used for the Biscover coating group (n = 90) and the control group (n = 10). The Biscover coating group was randomly assigned to nine subgroups of 10 each and the control group was assigned to two subgroups of 5 each according to the number of brushing strokes. An experimental 3-body wear test was conducted under different strokes of wear test. Tooth-brushing was accomplished with movement of each brush head set at a frequency of 100 rpm under a force of 1.5 N. Surface roughness was tested before, and after Biscover coating, and after brushing. Then, each of the 10 teeth of both groups were placed in artificial caries inducing solution for 7 days. All tooth surfaces were assessed using scanning electron microscopy. RESULTS: Biscover coated surfaces showed a smoother texture than enamel surfaces. The roughness was increased after experimental brushing and after 10,800 brushing strokes, the whole layer of Biscover wore out. However, teeth in the Biscover coating group had a cariostatic effect in cariogenic conditions. CONCLUSIONS: We suggest that white lesions in orthodontic patients can be suppressed by topical applications of Biscover.

Keyword

Surface sealant; Wear test; Cariostatic effect; Biscover

MeSH Terms

Acrylates
Bicuspid
Cariostatic Agents
Dental Enamel
Head
Humans
Light
Microscopy, Electron, Scanning
Resin Cements
Stroke
Tooth
Acrylates
Cariostatic Agents
Resin Cements

Figure

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  Fig 1. Specimens and Biscover. A, Teeth in resin block and mold (diameter, 50 mm; height, 10 mm); B, Biscover syringe type.

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  Fig 2. Wear tester. A, wear tester, pin on disk type (Model KD-WT02, Kwangduck FA. Gwangju, Korea); B, five teeth were subjected to wear tester simultaneously; C, tester brush, 3-raw brushes with soft bristles (Gum 311, Jone O Butler, Chicago, IL). Three tester brushes were positioned at 120o intervals; D, an illustration of wear test and tooth paste (Perio A+ Total effect tooth paste; LG Chemical Co, Seoul, Korea).

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  Fig 3. Surface roughness of Biscover coating groups according to the brushing cycle.

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  Fig 4. SEM micrographs of the section faces of Biscover coated teeth. Before brushing & after brushing (× 500). B1, no brushing strokes (0 month); B2, 450 brushing strokes (0.5 month); B3, 900 brushing strokes (1 month); B4, 1,800 brushing strokes (2 months); B5, 2,700 brushing strokes (3 months); B6, 5,400 brushing strokes (6 months); B7, 8,100 brushing strokes (9 months); B8, 10,800 brushing strokes (12 months); B9, 21,600 brushing strokes (24 months). Abbreviations, B, Biscover; E, enamel; arrow, border line between Biscover and enamel.

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  Fig 5. SEM micrographs of the surface of Biscover coated teeth. Before brushing & after brushing (× 2,000). B1, no brushing strokes (0 month); B2, 450 brushing strokes (0.5 month); B3, 900 brushing strokes (1 month); B4, 1,800 brushing strokes (2 months); B5, 2,700 brushing strokes (3 months); B6, 5,400 brushing strokes (6 months); B7, 8,100 brushing strokes (9 months); B8, 10,800 brushing strokes (12 months); B9, 21,600 brushing strokes (24 months).

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  Fig 6. SEM micrographs of the surface of Biscover coating group & control group after artificial caries examination (× 500). B8 and C1, 10,800 brushing strokes (12 months); B9 and C2, 21,600 brushing strokes (24 months).

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