Background: Khat is a large green shrub that grows at high altitude in the region extending from eastern to southern Africa, as well as on the Arabian Peninsula. Khat is widely consumed among the youth of Ethiopia; especially among high school, College and University students. Khat chewing is the risk of frequently absenteeism from class and poor academic performance of the students. Moreover, ...

Betel quid (BQ) is one of the most commonly consumed psychoactive substances. It has been suggested to be associated with various health issues, especially oral cancer. Evidence also points to possible decreased cognitive functions after long-term BQ chewing, such as attention and inhibition control. The present study aims to investigate the brain structure basis of BQ chewing in Hunan province...

PURPOSE To verify whether the number of chewing strokes and the chewing time are influenced by dentofacial deformities in habitual free mastication. METHODS Participants were 15 patients with diagnosis of class II dentofacial deformity (GII), 15 with class III (GIII), and 15 healthy control individuals with no deformity (CG). Free habitual mastication of a cornstarch cookie was analyzed, cons...

This study examined the effect of mouth breathing on the strength and duration of vertical effect on the posterior teeth using related functional parameters during 3 min of gum chewing in 39 nasal breathers. A CO(2) sensor was placed over the mouth to detect expiratory airflow. When no airflow was detected from the mouth throughout the recording period, the subject was considered a nasal breath...

Recent evidence has indicated that chewing gum can enhance attention, as well as promoting well-being and work performance. Four studies (two experiments and two intervention studies) examined the robustness of and mechanisms for these effects. Study 1 investigated the acute effect of gum on mood in the absence of task performance. Study 2 examined the effect of rate and force of chewing on moo...

background: chewing-gum may serve as an effective oral hygiene device when brushing may not be possible. the aim of the present study was to evaluate the effect of chewing sugar-free gum twice a day after meals in addition to tooth brushing on dental plaque and interdental debris.     methods: twenty four (12 males and 12 females aged 20-21 years) healthy third-year dental students participated...

background: qat (also known as khat , kat and miraa ) is a green-leaved plant ( catha edulis ). it is a shrub indigenous to yemen and certain parts of eastern africa. chewing the leaves, which have sympathomimetic and euphoric effects, has been documented in many countries and increased with worldwide migration. the effect of long-term chewing qat on the oral cavity is unknown. objective: a sys...