Dental adhesive systems: HEMA-free or HEMA-containing systems?

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22 RCTs were included in this review of the influence of the monomer HEMA in the formulation of dental adhesive systems suggests that HEMA-free adhesive systems do not have better clinical performance of the non-carious cervical lesion restorations than HEMA-containing systems.

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Composite restorations: direct or indirect placement?

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Only 3 RCTs could be identified for this review of the long-term performance of direct versus indirect composite inlays/ onlays in posterior teeth. the limited quality of the studies provide insufficient evidence to recommend direct over indirect techniques.

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