“…In the quantitative approach, instruments such as questionnaires (closed and open-ended, pre- and post-, anonymous, electronic online) [1, 3, 11, 25–27, 31, 33, 35, 36, 39, 46, 51, 52, 60, 64, 65, 73, 75, 76, 82, 84, 85], oral examinations [61, 62, 74], health and oral health-related indices [69], descriptive measurements [29, 30, 40, 43, 49, 54–58, 64, 65, 68, 70, 74, 77, 78, 81, 85–88], measurement of grades [37] and SWOT (strength, weakness, opportunities and threat) analyses [43] were used. Additionally, quantitative measurements, such as cost per patient, marginal cost and cost analysis [32, 41, 42, 79, 91, 92] were used to measure the cost-effectiveness of various programs. For qualitative measurement, tools, such as data documentation [63], interviews [28, 47, 50, 63, 80] and mixed approaches, questionnaires in combination with focus group discussions, interviews and open-ended questionnaires [34, 38,…”