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Impact of bariatric surgery on oral health conditions: 6-months cohort study




We evaluate oral health conditions before and after bariatric surgery.


The sample was composed of 59 patients who had undergone Roux-en-Y gastric bypass (RYGB). Salivary flow, periodontal pocket depth and dental wear were evaluated before and after 6 months of surgery. Body mass index (BMI), C-reactive protein (CRP) and glucose levels were obtained from the patient's medical files. A t-test was used for dependent samples.


The mean BMI decreased from 49.31 ± 8.76 to 35.52 ± 8.12 kg/m2 in 6 months after surgery (< 0.000). Before surgery, 67% of patients had high levels of CRP and 38% higher blood glucose levels and after surgery there were significant reductions in these levels (< 0.001). Salivary flow ranged from 0.84 to 0.95 ml/min. There was increased prevalence of periodontal pockets (= 0.022) and mean pocket depth increased to about 0.5 mm (< 0.001). The percentage of surfaces with dental wear in dentine was significantly higher after bariatric surgery (= 0.002), while dental wear in enamel decreased (= 0.019).


Bariatric surgery may improve systemic conditions. However, it had a negative impact on oral health conditions because of an increase in periodontal disease and dental wear.