Study explores link between tooth brushing, heart diseases

In a recent publication in the Scientific Reports journal, researchers conducted a study to explore the connection between tooth-brushing habits and the risk of cardiovascular diseases (CVDs) in individuals aged 20 years or older.

This study, carried out at Osaka University Hospital in Japan, provides valuable insights into the significance of consistent dental hygiene practices in preventing CVDs.

While previous research has emphasised the importance of oral care in managing various health conditions, including respiratory, gastrointestinal, and cardiovascular diseases, these studies have mainly focused on tooth brushing in relation to dental health without delving into its impact on systemic diseases such as CVDs.

The study involved 1,675 participants, who either visited the hospital's Unit of Dentistry for dental treatment, perioperative oral care, and infection screening or were hospitalised for examination, surgery, or treatment.

Based on their tooth-brushing habits, the participants were categorised into four groups: ‘Group MN’ members brushed their teeth twice daily (morning and night), those in ‘Group Night’ brushed their teeth only at night, ‘Group M’ brushed their teeth only in the morning, and ‘Group’ None’ participants did not brush their teeth at all.

The researchers analysed various factors, including age, gender, smoking history, follow-up results, as well as reviewed the dental and medical records of all participants. They evaluated the occurrence of cardiovascular events such as heart failure, arrhythmia, myocardial infarction, angina pectoris, and valvular and aortic diseases requiring surgery.

The study findings demonstrated that the individuals in the ‘MN’ and ‘Night’ groups exhibited significantly higher survival rates compared to those in the ‘None Group’. Additionally, dental indicators varied among the groups, with the MN group having the highest number of participants with deep dental pocket depths and increased tooth mobility.

Interestingly, the researchers noted that many individuals who neglected tooth brushing at night cited alcohol consumption as a reason for their omission. Furthermore, factors such as learned habits from childhood, lifestyle choices, regional variations, and a general lack of interest in dental hygiene contributed to the neglect of nighttime tooth brushing.

The study emphasised the importance of tooth brushing both in the morning and at night. While breakfast and lunch increase the risk of oral deposits, brushing only in the morning is insufficient for maintaining good oral hygiene. Brushing before bed is crucial in reducing the buildup of oral bacteria during sleep, which is associated with reduced salivary flow.

Overall, the findings of this study underscore the critical role of regular tooth brushing in preventing cardiovascular diseases. While brushing teeth before breakfast is necessary, the habit of brushing before bed is even more vital in maintaining oral health and reducing the risk of CVDs.