How do 2-step etching systems compare to 3-step etching systems in terms of clinical restoration survival? [November 20, 2017]

Search result: Two systematic reviews and one additional trial reports were found.

Clinical outcomes: While the trial report and one systematic review indicated no significant difference, one other systematic review suggests 3-step systems to be superior to 2-step systems for composite restorations in cervical cavities and inferior for composite restorations in load-bearing cavities of permanent teeth.

[‘Preliminary Systematic Literature Searches’ are based on SYSTEM’s periodic systematic searches of the dental literature and provide first overviews over existing clinical evidence but are limited in the number of databases searched, as well as the assessment of precision and internal validity of results and thus do not replace the need for a full systematic review report to the topic]