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Objective The aim was to examine how individuals treated for obesity with gastric bypass (GBP) surgery perceived their oral health and oral health-related quality of life (OHRQoL). Method All individuals in one Swedish region who had undergone GBP surgery (n = 1182) were sent a postal questionnaire 2 years after surgery. The questionnaire comprised items on sociodemographics, oral symptoms and the Oral Health Impact Profile-49 to assess the OHRQoL. Results The mean age was 47.6 years with 75% females, response rate 55.3%. The self-perceived oral health was rated low by 45% of the respondents. Gender differences were seen, for instance, regarding hypersensitive teeth (men 18.8%, women 30.8%, p = 0.003). Nine out of ten reported at least one oral impact experienced sometimes, fairly or very often, according to the Oral Health Impact Profile-49 (OHIP-49). The mean additive OHIP-49 score was 30.3 (SD 36.1). The associations between selfreported oral health and OHRQoL were consistent throughout. Tooth hypersensitivity generated an OR of 2.28 (95% CI 2.28-8.46) of having ≥ 2 impacts on OHRQoL. Conclusion A large proportion of individuals having undergone GBP surgery reported problems with their oral health and impacts on their OHRQoL, indicating a need for medical and dental staff-surgeons and general practitioners as well as other health professionals-to offer oral health promotion and prevention measures.

Objectives: To describe the oral health profile of individuals who had undergone gastric bypass surgery (GBP) or sleeve gastrectomy (SG) to generate hypotheses for further studies.Material and Methods: Fourteen individuals treated with GBP or SG surgery ≥ 2 years ago and with observed and/or perceived oral problems were recruited to a case series. The documentation included clinical and radiographic examinations, biomedical sampling, and self-reported diet and questionnaires. The results are presented descriptively.Results: The age range was 31 to 66 years and all had a BMI > 25 (range 25.4-44.7).Only four participants were fully dentate. Eleven out of 14 individuals exhibited severe decay. A majority had poor oral hygiene and high bacterial counts. The flow rates of unstimulated saliva were extremely low and hyposalivation was present in ten of the fourteen cases. Most perceived several oral health problems, such as chewing difficulty and tooth hypersensitivity.Conclusions: Individuals who had undergone GBP or SG surgery had poor clinically diagnosed oral health and perceived oral health problems. Longitudinal studies are needed to monitor the patients' oral health, from before bariatric surgery to longterm postoperatively.bariatric surgery, case series, oral health | INTRODUCTIONObesity is a global health issue today with worldwide rates tripling since 1975. In 2016, 650 million adults (13%) were reported as obese that is, a Body Mass Index (BMI) greater than or equal to 30 kg/m 2 (WHO, 2020). The corresponding proportion in Sweden is 15%, according to a recent national health survey (The Public Health Agency of Sweden, 2018). Obesity is considered a risk factor for an array of chronic diseases (The Global Burden of Disease 2015 Collaborators, 2017) however, studies on the association between an obese condition and oral disease show somewhat contradictory results and causal relationships are not well established (Nascimento et al., 2016;Shivakumar, Srivastava, & Shivakumar, 2018).Obesity is difficult to treat despite several treatment options, including reduced dietary energy intake, physical activity,