Abstract
ObjectiveThe purpose of this study was to provide information regarding the marginal adaptation of composite resin onlays in primary teeth previously treated with 1% sodium hypochlorite (NaOCl) (pulp irrigant) using two different resin luting agents. Material and MethodsForty extracted sound primary molars had their crowns prepared in a standardized machine and were randomly divided into 4 groups (n=10): G1 (1% NaOCl irrigation+EnForce); G2 (EnForce); G3 (1% NaOCl irrigation+Rely X); G4 (Rely X). The onlays were made with Z250 composite resin on plaster models. After luting, the tooth/restoration set was stored in 100% relative humidity at 37ºC for 24 h and finished with Soflex discs. Caries Detector solution was applied at the tooth/restoration interface for 5 s. The specimens were washed and four digital photos of each tooth were then taken. The extents of the gaps were measured with Image Tool 3.0 software. The percentage data were submitted to a Kruskal-Wallis test (α=0.05). The Relative Risk test analyzed the chance of a gap presence correlated to each group. ResultsThere were no statistically significant differences (p>0.05) among the groups. The relative risk test revealed that some groups were more apt to have a presence of gaps than others. ConclusionNeither the 1% NaOCl treatment nor the resin luting agents caused any alterations in the dental substrate that could have influenced the marginal adaptation of composite onlays in primary teeth.
Highlights
Gap measurement is a reliable method of evaluating the initial quality of resin restorations[1]
As the normal stresses at the tooth/composite interface of a restoration increases from the enamel PDUJLQV WRZDUGV WKH LQWHUQDO FDYLW\ DQJOH13, it can lead to discoloration, microleakage and secondary caries[31]
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Summary
Gap measurement is a reliable method of evaluating the initial quality of resin restorations[1]. Secondary dentin secretion DQG SXOSDO UHSDLU DFWLYLW\ GHFUHDVHV ZLWK DJLQJ LQ primary teeth These promote a favorable condition for the carious process to reach the coronary pulp[9]. Root FDQDO ¿OOLQJ LQ SULPDU\ WHHWK KDV EHHQ GRQH ZLWK VHYHUDO ¿OOHU SDVWHV WKDW GR QRW VHW VXFK DV ]LQF oxide and eugenol It is more dangerous LI FRQWDPLQDWLRQ RFFXUV LQ SULPDU\ WHHWK ZKHQ FRPSDUHG WR ¿OOLQJ PDWHULDOV XVHG LQ SHUPDQHQW teeth[15,17]. The hypotheses of the present study are: (1) WUHDWPHQW ZLWK 1D2&O FDQ LQFUHDVH WKH HQDPHO gaps of composite onlays in primary teeth and (2) WKHUH LV D GLIIHUHQFH EHWZHHQ WKH WZR UHVLQ OXWLQJ DJHQWV WHVWHG ZKLFK UHTXLUH DGKHVLYH V\VWHPV ZLWK different solvents and manufacturers’ instructions
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