ABSTRACT
BACKGROUND: The oral condition of obese patients may change following bariatric surgery owing to adverse effects that cause alterations in the oral cavity. The aim of this study was to evaluate the impact of bariatric surgery on the saliva of patients with morbid obesity. METHODS: Whole saliva samples were collected from 27 patients with morbid obesity (BMI >40 kg/m(2)), prior to and 6 months after bariatric surgery. Stimulated salivary flow rate, pH, buffering capacity, and microbial levels of mutans streptococci, Lactobacillus spp., and Candida albicans were analyzed from saliva. RESULTS: Values of all salivary variables before and after bariatric surgery were within the normal range, except for the level of C. albicans, which was elevated at both times. An increase in the level of mutans streptococci was observed after bariatric surgery (p < 0.05). CONCLUSIONS: The results suggest that the salivary levels of mutans streptococci increase following bariatric surgery in morbidly obese patients.
Subject(s)
Bariatric Surgery , Obesity, Morbid/surgery , Salivation , Adult , Bariatric Surgery/adverse effects , Dental Caries/epidemiology , Dental Caries/microbiology , Female , Humans , Hydrogen-Ion Concentration , Lactobacillus/isolation & purification , Male , Middle Aged , Obesity, Morbid/microbiology , Obesity, Morbid/physiopathology , Saliva/metabolism , Saliva/microbiology , Streptococcus mutans/isolation & purificationABSTRACT
The aim of this study was to evaluate the concentrations of calcium (Ca), inorganic phosphate (Pi) and fluoride (F) in carious dentin and in different layers of sound dentin. The samples examined were 52 permanent teeth (26 sound and 26 carious), which were subjected to two experiments to assess the mineral content of: 1) two layers (internal and external) of sound dentin and 2) sound and carious dentin. Ca and Pi were analyzed using a colorimetric method with arsenazo III (C22H18As2N4O14S2) and molybdate reagents, and F was analyzed using a specific electrode. A non-parametric test, the Mann-Whitney test, was used to verify differences between groups. Sound dentin showed a higher concentration of fluoride in the internal layer than in the external layer (P = 0.03), but no inter-layer differences in Ca or Pi concentration were evident. Lower concentrations of Ca, Pi and F were observed in carious dentin than in sound dentin (P < 0.05). The results of this study suggest that the internal layer of sound dentin has a higher fluoride content than the external layer, and that carious dentin has lower concentrations of Ca, Pi and F than sound dentin.
