Effect of dental status on changes in mastication in patients with obesity following bariatric surgery.

BACKGROUND: Patients scheduled for bariatric surgery (BS) are encouraged to chew slowly in order to optimise the digestion process. The influence of dental status on patients' ability to comply with advice on chewing behaviour is poorly documented. This study aims to compare modifications of chewing function before and after BS in three groups of obese patients differing in dental status. METHOD AND FINDINGS: A cohort of 46 obese women provided three groups: FD group: fully dentate (7-10 functional dental units [FU]); PD group: partially dentate (4-6 FU) without partial dentures; DW group: partial and complete denture wearers. Chewing time (CT), number of chewing cycles (CC), and chewing frequency (CF) were measured before and after surgery during mastication of standardised samples of raw carrot, peanuts, banana, apple and jelly. The median particle-size distribution (D50) of the pre-swallowed bolus was also evaluated for peanut and carrot. Before surgery, the PD and DW groups exhibited greater mean CCs and CTs than the FD group (SNK p<0.05) and produced a bolus with higher granulometry (SNK, p<0.05) than the FD group. After surgery, CT and CC increased for all groups and for all foods, but not statistically significant for jelly. The resulting changes in bolus granulometry observed depended on both food and dental status. The granulometry of carrot bolus remained as fine or as coarse in FD and DW groups respectively as it was before surgery while it was significantly decreased in the PD group (Student's test, p<0.001). CONCLUSIONS: After bariatric surgery, all the obese patients, regardless of dental status modified their chewing kinematics. The effects of this chewing behaviour on bolus granulometry depended on dental status and type of food. Further studies are needed to understand better the impact of dental status on feeding behaviour and nutrition in patients with obesity

Pathologies maternelles chroniques et pertes de grossesse. Recommandations françaises

International audienceAim.-To review the available data on maternal chronic diseases and pregnancy losses.Material and Methods-We searched PubMed and the Cochrane library with pregnancy loss,stillbirth, intrauterine fetal demise, intrauterine fetal death, miscarriage and each maternaldiseases of this paper.Results-Antiphospholipid antibodies (anticardiolipin, anti-beta-2-glycoprotein, lupus anti-coagulant) should be measured in case of miscarriage after 10 WG confirmed by ultrasound(grade B) and an antiphospholipid syndrome should be treated by a combination of aspi-rin and low-molecular-weight heparin during a subsequent pregnancy (grade A). We donot recommend testing for genetic thrombophilia in case of first trimester miscarriage(grade B) or stillbirth (grade C). Glycemic control should be a goal before pregnancyfor women with pregestational diabetes to limit the risks of pregnancy loss (grade A)with a goal of prepregnancy HbA1c < 7%. Overt and subclinical hypothyroidisms should betreated by L-thyroxin during pregnancy to reduce the risks of pregnancy loss (grade A).Women who are positive for TPOAb should have TSH concentrations follow-up during pre-gnancy and subsequently treated by L-thyroxin if they develop subclinical hypothyroidism(grade B).Conclusions.-Prepregnancy management of most chronic maternal diseases, ideally throughprepregnancy multidisciplinary counseling, reduces the risks of pregnancy loss

Distribution of patients included in the study according to dental status, age, BMI, and proportionate variation in BMI at three months post-surgery.

<p>Distribution of patients included in the study according to dental status, age, BMI, and proportionate variation in BMI at three months post-surgery.</p

Means values (<i>±SD</i>) of number of chewing cycles (CC), chewing time (CT) and median particle size of the pre-swallowed bolus (Bolus granulometry, D50) recorded before and after surgery in each group of patients.

<p>FD group (n = 23): patients with at least 7 functional dental units; PD group (n = 15): patients with 4, 5 or 6 functional dental units without dentures; DW group (n = 8): patients with fewer than 4 functional dental units wearing dentures. Student's paired <i>t</i>-test was used for respective comparisons of pre- and post-surgical means (ns: not significant; *: p<0.05; **: p<0.01; ***: p<0.001).</p