title: [The comparison of the effect of three restoration materials for the cavity convenience preparation]
abstract: The cavity restoration effects of light curing composite,chemical curing composite,glass ionomer were observed,for six and twelve months.The results showed that microleakage increased as time goes on inevitably.The failed incidence of class III restoration by glass ionomer was higher.The fact suggested that different preparation selected different materials.
authors.affiliation: Department of Endodontics, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University. Shanghai 200011,China.
authors.forename: L W
authors.initials: LW
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Xu