Systemically reviewing the topic Mandibular Third Molar Impaction and its components: prevalence, causes, classifications, complications, and managements. All studies pertaining to the topic and its components were included. Exclusion criteria were applied to exclude studies that were not PubMed indexed. The materials and methods used for this systemic review were to search in the PubMed database, using specific words "Mandibular Third Molar Impaction, Prevalence, Causes, Classifications, Complications, and Managements” and published in the English language. The articles were reviewed, 25 papers were identified in PubMed but a total of 20 papers were included in the final systemic review according to the specific keywords and materials mentioned above. The occurrence of Mandibular Third Molar Impaction can be seen in everyday routine oral surgery practice. The prevalence of Mandibular Third Molar Impaction is remarkable but varied from one study to another. Causes were investigated showing a multifactorial tendency. Classifications are very essential for diagnosing different types of impaction. Diverse Complications related to Mandibular Third Molar Impaction are possible, yet avoidable. Management was reviewed showing a verity of treatment modalities.