Morbid obesity control can be done by bariatric surgery that restricts or reduces the amount of food absorption. The objective of this review was to identify the consequences of bariatric surgery and its repercussions on oral health. It was used the Virtual Library of Health, which included articles that had any direct or indirect connection between bariatric surgery and oral health, and published in the last ten years. Some complications of the surgery are chronicle reflux and nutritional deficiency, which may bring repercussions on the oral cavity, such as tooth erosion, bone loss and dental caries. On the other hand, there are also positive impacts, such as the decrease of diabetes, apnea and improvement on self-esteem, that makes the patients less vulnerable to complications regarding oral health, for example xerostomy and periodontal disease. Maintaining proper oral health in patients undergoing bariatric surgery contributes to success after surgery protecting benefits and minimizing side effects.