Background: This paper aims to examine published articles between January 2008 and January 2019 on the different palatal surgeries performed on OSA patients and the treatment outcomes, which in turn will be used to determine the effectiveness of various palatal surgical techniques in treating OSAS and the most effective of the palatal surgical techniques in treating OSAS. Patients and Methods: The current review followed the guidelines of preferred reporting items for systematic reviews and meta-analysis statement 2009 (PRISMA). The quality of relevant studies was assessed using NIH quality assessment tool for observational cohort and cross-sectional studies as well as NIH tool for quality assessment for case series studies. Results: Meta-analyses of relevant studies showed that the surgical technique that achieved the best reduction on AHI (Apnea/Hypopnea Index) was the lateral pharyngoplasty followed by the Anterior Palatoplasty, with a significant...........
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