Impact of gastroplasty on salivary characteristics, dental health status and oral sensory aspects: A controlled clinical study

Background Saliva is a non‐invasive source of biomarkers useful in the study of different pathophysiological conditions. The qualitative and quantitative study of saliva, as well as the assessment of oral health, can be particularly useful for a better understanding of obesity due to its importance in the food oral perception and ingestion. Objectives To evaluate the effect of treatment of morbid obesity (dietary counselling versus gastroplasty) on salivary characteristics, oral sensory perception and dental health in a controlled study. Methods Seventy‐three adults (60 females; 19–59 years) with morbid obesity were divided in: Control group (CG; n = 34) followed‐up during a 6‐months dietary programme, and Gastroplasty group (GG; n = 39) evaluated immediately before, 3 and 6 months after gastroplasty. Dietary habits, Oral Health Impact Profile and xerostomia complaints were investigated by interview. The clinical examination included anthropometric and caries experience evaluation. Salivary flow rate, buffering capacity, total protein and alpha‐amylase levels, and sensitivity for the four basic tastes were assessed. Two‐way mixed model and sign test were applied. Results Physical and clinical aspects did not differ between groups in the beginning of the study, and GG showed a rapid weight loss after surgery (p