Abstract
The possibility of using a water-jet technique for removing softened dentin or for deleting adhered dental cements and restored composite resins was investigated. High-speed water was jetted to healthy tooh substances, softened artificial dentin, dental cements and compositeresins using a compact water-jet device. The diameter and depth of the pit performed by high-speed water on the surface of each material were measured and the load applied to each material by high-speed water was measured using a load cell. When cylinder pressure was 300 kgf / cm2, all test specimens were weighted at about 45gf. As a result, it was found that water-jet technique is a method of selectively removing dental caries and the cement or composite resin adhering to teeth without over-grinding the healthy tooth substance when the proper cylinder pressure(under 300 kgf / cm2)is chosen.
