title: Effects of delayed polishing on gap formation of cervical restorations.
abstract: This study evaluated the effect of polishing after one-day storage in water on the gap formation around a Class V restoration completely bordered by enamel (coronal cavity) using one resin-modified glass ionomer, one compomer and one conventional glass ionomer as a control. The study also examined gap formation of these materials in two different cervical restorations-a cervical cavity incisally bordered by enamel and cervically bordered by dentin and a root surface cavity completely bordered by dentin. When the specimens of the two types of glass-ionomer material were polished immediately after the setting procedure, 100-120 gaps around the coronal restorative cavity were observed. In contrast, only 10-20 gaps were observed when the specimens were polished after one-day storage. Significant differences in the two glass-ionomer restorative materials were observed between immediate polishing and polishing after one-day storage. The compomer not show this pattern. Restorations placed in enamel/dentin and all-dentin gave results similar to those in all-enamel.
authors.affiliation: Department of Biomaterials, Okayama University Graduate School of Medicine and Dentistry, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Irie
authors.forename: K
authors.initials: K
authors.lastname: Suzuki
mesh_terms: D001641:Bicuspid; D020770:Compomers; D003743:Dental Enamel; D018772:Dental Marginal Adaptation; D003775:Dental Polishing; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006801:Humans; D008689:Methacrylates; D012117:Resins, Synthetic; D017640:Silicates; D018709:Statistics, Nonparametric; D013997:Time Factors; D019237:Tooth Cervix
chemical_list: D020770:Compomers; D017220:Dentin-Bonding Agents; C088486:Dyract; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; D012117:Resins, Synthetic; D017640:Silicates; C084541:Fuji glass-ionomer lining cement