## 4 Discussion  
This study demonstrated that there was no statistically significant difference between the overall mean bond strength recorded in the CHX-applied groups versus the non-CHX-applied groups. Adper Prompt L-Pop self-etch adhesive and Adper Scotchbond 1 XT total-etch adhesive were the best performers both when applied without CHX, giving mean BS values of 20.41 \(\pm\) 7.05 MPa and 19.85 \(\pm\) 7.47 MPa, respectively, and when applied with CHX, giving mean BS values of 20.13 \(\pm\) 4.69 MPa and 18.59 \(\pm\) 5.13 MPa, respectively. Therefore, the null hypotheses was accepted. There are very few studies carried out using the novel adhesion test proposed in this study; only a single study carried out in 2021 by [PERSON] and collaborators [23] coincides in the analysis of adhesion strength with this same resistance test, though it was disparate in terms of the non-use of CHX during the adhesive process in deciduous dentition and the higher percentage of orthophosphoric acid used in acid etching. If we compare the data provided by these authors [23] for universal adhesives with self-etch strategies, with a value of 13.66 \(\pm\) 2.81 MPa, versus the values of our study for this same category of adhesive of 17.28 \(\pm\) 9.48 MPa when applied without CHX pretreatment and 16.15 \(\pm\) 8.53 MPa on average both when CHX was applied and when CHX was not applied, we do not observe large discrepancies; similarity also in the data with respect to universal adhesives with total-etch strategies with the value of 14.98 \(\pm\) 3.96 MPa similar to 15.28 \(\pm\) 4.45 MPa when applied without CHX pretreatment and 16.34 \(\pm\) 4.90 MPa on average both when CHX was applied and when not applied, provided by the present study. Regarding self-etching adhesives, we also show the similarity of our results with respect to the study carried out in 2021, which provided a BS value of 14.48 \(\pm\) 2.89 MPa, consistent with 20.41 \(\pm\) 7.05 MPa when this type of adhesive was applied without CHX and 20.27 \(\pm\) 5.89 MPa on average both when CHX was applied and when it was not applied, in our study. If the exploration of the data is extended to other types of studies, despite the use of different adhesion tests, but coinciding in the inclusion of CHX in the adhesive process, data that show similarity with the same study groups in our research, are those provided by [PERSON] and collaborators in 2003 [19], which ranged between 19.88 \(\pm\) 1.04 MPa and 17.99 \(\pm\) 1.15 MPa in their analysis of universal total-etch adhesion strategies with the incorporation of CHX. Similar findings have been reported in other studies, such as that of [PERSON] et al. in 2018 [25], with values ranging from 14.13 \(\pm\) 2.09 MPa to 16.45 \(\pm\) 2.41 MPa in universal self-etching adhesives. The current study showed that CHX use during the bonding process in primary dentition did not compromise the immediate BS. The results of this analysis confirm the results of other studies that evaluated dentin rehydration with 2% CHX following the bonding process [26; 27; 28; 29]. However, other studies have reported that after an ageing period equivalent to 6 months the application of CHX 2% as a pretreatment increased the bond strength with an application time of 30 or 60 s [7; 30]. Earlier in vitro and in vivo research on permanent and deciduous teeth demonstrated that the administration of chlorexidine at levels from 0.12% to 2% did not produce detrimental effects on the immediate BS of the dentine substrate and the polymeric material [19; 26]. Regarding the application and drying of CHX, no differences have been found between the various methods, the most common being microbrush application and drying with absorbent paper. On the other hand, the current study showed significant differences between the bond strengths of the different adhesives used, regardless of whether CHX was used or not as a pretreatment.