Effect of Surface Wetness of Etched Dentin on Bonding Properties of Wet-Bonding System.

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  • 象牙質の湿潤状態がウエットボンディングシステムの接着性に及ぼす影響について

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Abstract

This in vitro study was conducted to evaluate the effect of variations of surface wetness of etched dentin on long-term bonding durability (until one year) and microleakage after thermocycle (5-55°C, 5, 000 times) of Single Bond adhesive system. Etched dentin surfaces after rinsing off the etchant were assigned to following three conditions;(1) Keeping moist by removing excess water by blotting (Wet), (2) Drying for 10s with air-blast (Dry), (3) Drying for 10s and re-moisting by water rinse for 10s and Wet technique (Rewet). For Wet dentin, constant bond strength and fractured dentin surfaces (adhesive failure) were observed throughout all periods and good marginal sealing was obtained. Drying dentin by using air syringe after rinsing off the etchant caused significantly reduced bond strength and degradation of fractured surfaces after one month, and poor marginal seal effectiveness. Re-wetting dentin with water almost re-established bond strength and marginal sealing but degraded dentin surfaces were noted at one year. These findings suggest that Single Bond system exhibits excellent bonding durability and marginal sealing on wet dentin surfaces. Drying dentin surface harms bonding durability and marginal seal effectiveness, and re-wetting with water is not enough to compensate the dryness of dentin surface with air-blast.

Journal

  • Adhesive Dentistry

    Adhesive Dentistry 18 (3), 207-215, 2000

    Japan Society for Adhesive Dentistry

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