title: Impact of bariatric surgery on oral health conditions: 6-months cohort study.
abstract: OBJECTIVE
  We evaluate oral health conditions before and after bariatric surgery.
  
  
  METHODS
  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.
  
  
  RESULTS
  The mean BMI decreased from 49.31 ± 8.76 to 35.52 ± 8.12 kg/m(2) in 6 months after surgery (P < 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 (P < 0.001). Salivary flow ranged from 0.84 to 0.95 ml/min. There was increased prevalence of periodontal pockets (P = 0.022) and mean pocket depth increased to about 0.5 mm (P < 0.001). The percentage of surfaces with dental wear in dentine was significantly higher after bariatric surgery (P = 0.002), while dental wear in enamel decreased (P = 0.019).
  
  
  CONCLUSIONS
  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.
authors.affiliation: Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil.
authors.forename: Patrícia Garcia
authors.initials: PG
authors.lastname: de Moura-Grec
authors.forename: Joselene Martinelli
authors.initials: JM
authors.lastname: Yamashita
authors.forename: Juliane Avansini
authors.initials: JA
authors.lastname: Marsicano
authors.forename: Reginaldo
authors.initials: R
authors.lastname: Ceneviva
authors.forename: Celso Vieira
authors.initials: CV
authors.lastname: de Souza Leite
authors.forename: Gilberto Borges
authors.initials: GB
authors.lastname: de Brito
authors.forename: Sergio Luis Aparecido
authors.initials: SL
authors.lastname: Brienze
authors.forename: Sílvia Helena
authors.initials: SH
authors.lastname: de Carvalho Sales-Peres
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000032:analysis; D015992:Body Mass Index; D002097:C-Reactive Protein / Q000032:analysis; D015331:Cohort Studies; D003743:Dental Enamel / Q000473:pathology; D003804:Dentin / Q000473:pathology; D048909:Diabetes Complications / Q000097:blood; D005260:Female; D005500:Follow-Up Studies; D015390:Gastric Bypass / Q000379:methods*; D006801:Humans; D008297:Male; D009767:Obesity, Morbid / Q000097:blood / Q000601:surgery; D009909:Oral Health; D017622:Periodontal Attachment Loss / Q000145:classification; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000145:classification; D012463:Saliva / Q000378:metabolism; D012636:Secretory Rate / Q000502:physiology; D057085:Tooth Wear / Q000145:classification
chemical_list: D001786:Blood Glucose; D002097:C-Reactive Protein
keywords: Bariatric surgery; obesity; oral health; periodontal diseases; salivary flow; tooth erosion