Oral Hygiene: a complete guide to healthy teeth
Oral hygiene is more than just a quick brush in the morning. It's a complete health act. According to the WHO, nearly 100% of adults experience at least one cavity in their lifetime — and 10 to 15% suffer from severe periodontitis. These figures highlight the importance of a rigorous dental routine, starting from a young age.
In this guide, we review the most common dental pathologies, official medical recommendations, and practical steps to adopt daily.
What is dental plaque and why is it dangerous?
Dental plaque is a bacterial biofilm that continuously forms on tooth surfaces. It results from the accumulation of bacteria, salivary proteins, food debris, and organic acids produced after each meal.
When plaque is not removed by brushing, it calcifies into tartar — a hard substance that brushing alone can no longer remove. Only a professional scaling by a dental surgeon can then eliminate it.
The bacteria in plaque convert dietary sugars into lactic acid. This acid attacks tooth enamel, causing progressive demineralization — the first stage of caries disease.
The most common dental pathologies
Dental caries
Caries is a bacterial infection that progressively destroys the tooth structure, from the enamel to the pulp. It is directly linked to:
- Excessive sugar consumption, especially between meals
- Insufficient or poorly executed brushing
- Fluoride deficiency
Untreated, a cavity can evolve into pulpitis (inflammation of the pulp) or a dental abscess.
Gingivitis
Gingivitis is an inflammation of the gums caused by the accumulation of bacterial plaque at the gumline. Its characteristic clinical signs are:
- Red and swollen gums
- Bleeding when brushing
- Halitosis (bad breath)
Gingivitis is reversible with good hygiene. If left untreated, it progresses to periodontitis.
Periodontitis
Periodontitis is an infection of the periodontal tissues — which are all the supporting structures of the tooth: gum, periodontal ligament, and alveolar bone. It causes:
- Periodontal pockets (pathological spaces between the gum and the tooth)
- Progressive gum recession
- Tooth mobility that can lead to tooth loss
The WHO estimates that 10 to 15% of adults worldwide suffer from severe periodontitis. Periodontal disease is also associated with an increased risk of cardiovascular diseases, stroke, and glycemic imbalance in diabetics — as oral bacteria can migrate into the bloodstream.
Official medical recommendations
Brushing frequency and duration
The FDI (World Dental Federation) and the HAS (French National Authority for Health) recommend:
- Brushing at least twice a day, including mandatory brushing in the evening before bed
- A duration of at least 2 minutes per session
- Using fluoride toothpaste (minimum fluoride content of 1,000 ppm for adults)
Note: the average brushing time for French people is 57 seconds — less than half the recommended time.
Recommended brushing technique
The UFSBD (French Union for Oral Health) recommends the B.R.O.S. technique:
- Brush top and bottom separately
- Tilt the brush Obliquely at 45° towards the gums
- Follow a complete Sweep, not forgetting the inner and occlusal surfaces
Horizontal brushing — still too common — causes cervical erosions and should be avoided.
Wait 30 minutes after meals
After a meal or an acidic drink, oral pH drops. Brushing teeth immediately risks spreading acidity over weakened enamel and accelerating dental erosion. The medical recommendation is to wait at least 30 minutes after eating before brushing your teeth.
Interdental hygiene: the forgotten step
Brushing alone does not clean interdental spaces, areas where 40% of plaque accumulates. Daily use of complementary tools is essential:
- Dental floss: to be used whenever two teeth touch
- Interdental brushes: suitable for wider spaces
- Water flosser (oral irrigator): effective for orthodontic appliances and bridges
Mouthwashes
Used after brushing, mouthwashes help eliminate residual bacteria. There are two types:
- Therapeutic (antiseptic, anti-inflammatory): to be used by prescription, for a limited duration so as not to unbalance the oral microbiota
- Maintenance: can be used daily morning and evening in addition to brushing
Manual or electric toothbrush: what do studies say?
Clinical studies are clear: electric toothbrushes remove more dental plaque than a manual brush, provided they are used correctly. Sonic technology, like that equipping the Pulse Care Bamboo+ brush, generates up to 40,000 vibrations per minute. This movement reproduces and amplifies the vertical motion recommended by dental surgeons, while reaching hard-to-access areas.
A manual brush remains effective if the technique is perfect — but it leaves less room for error.
Whichever brush is chosen, the HAS and UFSBD recommend changing the brush head every 3 months, or after an infectious episode (flu, tonsillitis).
The impact of diet on dental health
Sugar is the primary enemy of tooth enamel. Oral bacteria ferment it into lactic acid, which attacks and demineralizes the tooth. Some essential rules:
- Limit free sugars, especially between meals
- Avoid acidic drinks (sodas, fruit juices) outside of meals
- Favor a diet rich in calcium and phosphorus, minerals that make up enamel
- Drink water after each meal to rebalance oral pH
At-risk populations: specific needs
Children
Brushing begins as soon as the first milk tooth appears (around 6 months), performed by an adult until age 6. The first visit to the dental surgeon is recommended at this age. The oral health prevention examination is mandatory at 6 and 12 years old in France.
Pregnant women
Hormonal changes during pregnancy increase vulnerability to gingivitis. Rigorous oral hygiene is essential, as periodontal disease is associated with an increased risk of premature birth.
Seniors
Decreased salivary secretion (hyposalivation or xerostomia) linked to certain medications (psychotropics, antihypertensives, diuretics) significantly increases the risk of cavities. The HAS then recommends a high-fluoride toothpaste (up to 5,000 ppm).
Frequency of visits to the dental surgeon
An annual check-up with the dental surgeon is recommended, even in the absence of pain. The goal: to detect early cavities, monitor periodontal status, and perform professional scaling if necessary.
Spacing out consultations creates a vicious cycle: the rarer the visits, the more extensive — and costly — the necessary treatments.
Summary: the ideal oral hygiene routine
| Action | Frequency | Duration |
|---|---|---|
| Tooth brushing | 2 times/day minimum (morning + evening) | 2 minutes |
| Dental floss / interdental brush | 1 time/day | — |
| Maintenance mouthwash | 2 times/day after brushing | — |
| Brush head replacement | Every 3 months | — |
| Dental surgeon consultation | 1 time/year minimum | — |
Good oral hygiene protects teeth, yes — but also overall health. The links between periodontal health and systemic pathologies (cardiovascular diseases, diabetes) are now well documented. Daily brushing is one of the simplest and most effective preventive measures you can adopt.
Sources: WHO, HAS (French National Authority for Health), FDI (World Dental Federation), UFSBD, ARS Auvergne-Rhône-Alpes, Ameli.fr
