Objectives: To determine the frequency of use of the core outcome domains published by the Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (IMMPACT) in burning mouth syndrome (BMS) randomized controlled trials (RCTs).Methods: This systematic review, conducted as part of the World Workshop on Oral Medicine VII (WWOM VII), was performed by searching the literature for studies published in PubMed, Web of Science, PsycINFO, Cochrane Database/Cochrane Central, and Google Scholar from January 1994 (when the first BMS definition came out) through October 2017.Results: A total of 36 RCTs (n = 2,175 study participants) were included and analyzed. The overall reporting of the IMMPACT core and supplemental outcome domains was low even after the publication of the IMMPACT consensus papers in 2003 and 2005 (mean before IMMPACT consensus publication = 2.6 out of 6; mean after IMMPACT publication = 3.8 out of 6). Use of validated assessment tools recommended by the IMMPACT consensus was scarce (1.9 out of 6). None of the RCTs reviewed cited the IMMPACT consensus papers.Conclusions: The underreporting of IMMPACT outcome domains in BMS RCTs is significant. Raising awareness regarding the existence of standardized outcome domains in chronic pain research is essential to ensure more accurate, comparable, and consistent interpretation of RCT findings that can be clinically translatable.

Clinical studies have shown favorable outcomes following use of platelet rich fibrin (PRF), either alone or in conjunction with biomaterials for alveolar ridge reconstruction (ARR) or guided bone regeneration (GBR) . While PRF application accelerates wound healing and reduces postoperative discomfort, its effects on the alveolar bone gain, as part of ARR or GBR is less clear. Therefore, this study aims to investigate the clinical effectiveness of PRF when used in ARR or GBR, as well as postoperative discomfort following these procedures. A systematic search using the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) method was performed to include database searches from MEDLINE (OVID interface, 1946 onwards), EMBASE (OVID interface, 1974 onwards) and Global Health (OVID interface, 1973 onwards). Of the 74 studies initially identified, 7 studies were included for the systematic review, including 6 randomized controlled trials (RCTs) and 1 cohort study. The meta-analysis showed that the incorporation of PRF as part of ARR or GBR resulted in an increase in horizontal ridge width, a reduction in the rate of resorption increase, while postoperative discomfort was the same or slightly improved. The risk of bias quality was low for only 1 out of the 6 RCTs and the Newcastle Ottawa scale assessment showed that cohort study was of high quality. PRF application in ARR or GBR is associated with increased horizonal alveolar ridge width and reduce rate of graft resorption. However, the findings related to both outcome measures were based on a limited number of studies. PRF application can be effectively used as part of ARR or GBR to increase the horizontal ridge width and reduce the rate of graft resorption.