Un studiu al dentiştilor din Noua Zeelandă a scos la iveală faptul că oamenii care dorm cu gura deschisă au mai multe carii decât cei care nu fac asta. Cercetătorii susţin că acest lucru este cauzat de faptul că respiratul pe gură usucă saliva şi distruge mecanismul care ţine cariile departe, potrivit medicalnewstoday.com. PH-ul salivei devine acid, astfel că dinţii nu se mai pot apăra de bacterii. Studii anterioare au arătat că persoanele care au gura uscată au un risc mai mare de a suferi de eroziunea dinţilor.
Cercetătorii din Noua Zeelandă au observat că oamenii care dorm cu gura deschisă au un nivel scăzut al PH-ului. Astfel, dacă smalţul dinţilor începe să se dizolve la un PH de 5.5, cei care dorm cu gura deschisă au un PH de aproximativ 3.6. Dacă ai multe carii, s-ar putea să faci o greşeală în timpul somnului.
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