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For those of us who catch flies while we sleep, it’s bad news. Scientists have found that sleeping with the mouth open can be as damaging to teeth as sipping a fizzy drink before bed. This is because breathing through the mouth dries it out – removing the protective effect of saliva, which has a natural ability to kill the bacteria in the mouth that produce acid. As acid levels rise through the night, tooth erosion and decay can begin. The researchers believe the findings help to explain observations of dentists that people who sleep open-mouthed have higher rates of tooth decay. Tooth decay in mouth sleepers is often worse at the back – this is because the back of the mouth tends to get drier than the front. Patients with asthma and obstructive sleep apnoea are more likely to breathe through the mouth at night. Under normal conditions, the pH level in the mouth – the measure of acidity or alkalinity – is a neutral level of 7.7. But sleeping with the mouth open reduced this to a mildly acidic average a pH of 6.6, according to the study published in the Journal of Oral Rehabilitation. In some people, acidity levels rose as high as 3.6. This is high enough to erode tooth enamel and akin to having a glass of orange juice or can of fizzy drink before bed. Men are most likely to be affected, as research has shown nearly a third breathe through their mouths while asleep, compared to just five per cent of women. Joanne Choi, a sleep researcher at Otago University in New Zealand, and her colleagues created a device that can be clipped to the teeth at night. This records acidity levels and transmits data to a computer. She then asked 10 volunteers to sleep with nose clamps so they were forced to breathe through their mouths on one night. On a second night, volunteers – who had an average age of 25 – slept normally without the clamp. Previous attempts to measure acidity have involved people waking up participants during sleep – which could disrupt the body’s rhythms and give unreliable results. Ms Choi, a PhD student, said: ‘This study is the first to continuously monitor intra-oral pH changes in healthy individuals over several days. ‘Our findings support the idea that mouth-breathing may indeed be a causal factor for dental diseases such as enamel erosion and caries.’ Source: admin Latest posts by admin (see all) - 5 Proven Tips To Prevent Your Lips From Darkening - August 2016 - Try the Cucumber Diet and Lose 7kg in 14 Days - August 2016 - You Have Lost Part of Your Hair? Here is How to Grow Out Your Hair Faster - August 2016
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Bez obzira na to je li u pitanju navika, muči li vas hrkanje ili sinusi pa ne možete disati na nos, spavate li otvorenih usta imamo jako loše vijesti. Studija objavljena u Journal of Dental Rehabilitation pokazala je kako spavanje s otvorenim ustima šteti zubima jednako kao i gazirana pića. I to kada biste ih popili prije spavanja, a da potom niste oprali zube. Disanje na usta isušuje nepce i usnu šupljinu, što uklanja zaštitni efekt sline koja ubija bakterije. Upravo te bakterije proizvode kiselinu, uništavaju caklinu i glavni su krivac za karijes (zloglasni šećer im je samo hrana). Istraživači su bili ponukani zapažanjima stomatologa koji su uočili da ljudima koji spavaju otvorenih usta brže propadaju zubi. Kvarenje zuba je češće i prilikom spavanja na leđima zbog toga što je zadnji dio usta suši. Također, pacijenti s astmom češće dišu na usta tijekom spavanja. Tokom normalnih uvjeta razina pH u ustima – je na uobičajenoj razini od 7,7. Ali spavanje otvorenih usta spušta pH od 6,6, a dok kod nekih ljudi kiselost poraste i do 3,6. To je dovoljno kiselo da nagrize zubnu caklinu kao i gazirano piće prije spavanja. Istraživanjima se došlo do zaključka da muškarci češće spavaju otvorenih usta nego žene. zenit.ba