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B-scan for a representative specimen of the TS group at different time intervals: (a) baseline, (b) 2600 TC, (c) 5200 TC, and (d) 10000 TC. Regardless of the time interval, the absence of bright bands of pixels with low backscattered reflection at the cavity floor indicates no loss of interfacial seal. E: enamel; D: dentin; RC: resin composite.
