An in-vitro investigation of microleakage and gap size of glass ionomer/composite resin "sandwich" restorations in primary teeth.
Eighty extracted primary molars were divided into four groups of twenty teeth. Class II cavities were prepared in all teeth with equal numbers of proximal boxes having cavosurface margins either in enamel, or dentin/cementum. Each group was allocated to an open or closed sandwich technique using glass ionomer as a lining. Following the placement of the composite resin restorations, the gap size measured at the proximal box was greatest for the closed sandwich group with the cavosurface margin on enamel (0.203 microns) or dentin/cementum (0.174 microns). Microleakage scores were measured at the proximal box and were greatest for the closed sandwich group with the cavosurface margin on dentin/cementum. The best result was obtained for the open sandwich group with the cavosurface margin on enamel.
Reid
J S
JS
Department of Child Dental Care, University of Glasgow, Scotland.
Saunders
W P
WP
Sharkey
S W
SW
Williams
C E
CE
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry; D003736:Dental Cavity Lining; D003743:Dental Enamel; D003763:Dental Leakage; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008963:Molar; D019279:Resin Cements; D012823:Silicate Cement / Q000737:chemistry; D018709:Statistics, Nonparametric; D014094:Tooth, Deciduous
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D019279:Resin Cements; C054101:ChemFil II; C062652:Prisma Universal Bond; C073466:Prisma APH; D012823:Silicate Cement