Teruo Toko

In vitro inhibition of caries around a resin composite restoration containing antibacterial filler.

Class V cavities were prepared and restored with resin composite containing antibacterial filler powder (Apacider-AW, Ap-AW) using experimental restorations. The restored teeth were incubated in vitro with the cariogenic bacteria Streptococcus mutans IFO 13955. Ground sections were then prepared and examined using macrophotography. Lesions of the outer and inner wall were noted, and the depths of which the lesions penetrated were measured. We found that, in restorations containing 1-5 wt% Ap-AW, caries penetrated the marginal area, while in restorations containing 10 wt% Ap-AW the margin remained free of caries out to a distance of about 1.1 and 1.8 mm on the occlusal and gingival sides, respectively.

Clinical evaluation of tooth sensitivity during cavity preparation with Er:YAG laser

Abstract The efficacy of a high-pulse Er:YAG laser in treating caries was evaluated clinically. Caries removal and cavity preparation were performed using an Er:YAG laser (Er-D1, Hoya Continuum, Japan) at 30–350 mJ/pulse, 20 or 30 pps without local anesthesia. The cavities were restored with adhesive resin composite according to the manufacturers instructions. After treatment, the patients were asked to express the level of pain and discomfort felt during cavity preparation with the Er:YAG laser by means of a Visual Analogue Scale (VAS). The mean VAS value for discomfort was 6.03 and female patients recorded a lower value than male patients (P

A clinical evaluation of a high-pulse rate erbium:YAG laser for dental cavity preparation

A wave length of Er:YAG laser is 2940 nm; it has high absorbability in water, and is notable as dental hard tissue cutter. Previous study at 10-Hz irradiation showed good result in vivo. The aim of this study is to evaluate the effect of the higher pulse rate, 30 Hz, Er:YAG laser for adhesive resin cavity preparation in vivo. Sixty cavities were prepared by high-pulse Er:YAG laser, and clinical symptoms were recorded by operator and donor, respectively. The results showed that high-pulse rate Er:YAG offers less painful, safe and effective cavity preparation without any side effect.