Influence of Dentin Priming with Tannin-Rich Plant Extracts on the Longevity of Bonded Composite Restorations

Table 7

Contact angle formed by the adhesive system on dentin treated with different plant drug extracts.

Experimental groups	Contact angle
CTL	38.0 (2.0)^A
CHX	31.3 (0.3)^A
MTZ	36.3 (0.3)^A
CTC	25.8 (0.2)^B
GUA	29.2 (1.2)^A
GCH	24.7 (0.7)^B
TNA	20.7 (0.3)^B

Different letters (A and B) within the columns indicate significant difference (). In degrees.