Oral health is one of the most difficult things to master as an individual. Before you get to reach a point where you can feel that you are close to mastering the game, you would have tried a lot of different products and dental routines.
In your oral health journey, you have visited the dentist many times for fillings and root canals because you felt pain at some point due to a toothache.
However, now there is a certain sensitivity that you feel when you drink water, especially cold water, which is sharp and throbbing.
Brushing teeth has even become more difficult because of this pain; it is unbearable. Naturally, you grab a mirror to look for a new cavity, but you find absolutely nothing.
It feels like a losing game. We are constantly told that oral care is a delicate balancing act: Brush your teeth, but do not scrub too hard. Enjoy a sweet treat, but not too often. Drink soda, but only through a straw. Use toothpaste, but make sure it is not too abrasive. Trying to stay up on your game in the middle of all these rules can make you feel like you just cannot win.
This raises a crucial question: If your oral hygiene is spectacular, your diet is balanced and you are completely free of cavities, what else could be causing this severe, unprovoked tooth sensitivity?
In dental science, there is a trio of distinct, silent culprits that are systematically destroying our teeth: abrasion, erosion, and abfraction, commonly described as NCCLs (Non-Carious Cervical lesions), meaning that they are non-decay associated and they develop on the narrowest part of the tooth, the neck of the tooth. The area slightly above the demarcation between the root and the crown (the visible white part of the tooth).
Dental abrasion: The friction factor
Dental abrasion is the physical wearing away of tooth enamel and dentin caused by external factors like a toothbrush or toothpaste. It is the literal scrubbing away of your precious smile.
The most common culprit behind abrasion is a well-intentioned routine. A majority of people believe that the harder they brush, the cleaner their teeth will become.
In reality, pairing a hard-bristled toothbrush with an aggressive, sawing motion acts like sandpaper on the teeth.
Imagine how you clean a dirty iron with sandpaper and how clean it looks afterwards.
It is the same analogy. Brushing hard may feel like the teeth are cleaner than before, but the more you do it, the more the quality decreases. Over time, this friction cuts V-shaped notches into the necks of the teeth and pushes back the gums.
However, toothbrushes are not the only offenders. Severe abrasion can also be noticed in patients with unique habits, for example, people who bite their fingernails, hold sewing needles or bobby pins between their teeth, or frequently chewing on sunflower seeds can wear deep. Abrasion is all about the mechanical wearing of enamel.
Dental erosion: The acid attack
Dental erosion is the chemical wearing of the enamel. Erosion occurs when the hard enamel surface is dissolved by chemical processes, specifically, exposure to acids that do not come from the fermentation of sugar by oral bacteria.
In our modern diet, acid is everywhere. The rise of energy drinks, carbonated sodas, citrus waters, and sports beverages has led to an epidemic of dental erosion. When these acidic liquids wash over the teeth, they temporarily soften the enamel. If you brush immediately after consuming something acidic, you strip away that softened layer entirely.
Erosion can also be a warning sign of internal health struggles. Chronic acid reflux (GERD) and eating disorders like bulimia introduce highly corrosive stomach acids into the oral cavity. Unlike abrasion, which targets specific spots, erosion leaves teeth looking hollowed out, smooth and glazed, frequently shortening the teeth and exposing the yellowish dentin beneath, which then causes pain due to proximity to the nerve.
- Dental abfraction: Pressure-induced
Perhaps the most fascinating and debated member of the trio is abfraction. Unlike abrasion (friction) or erosion (acid), abfraction is caused by mechanical stress and structural fatigue.
When you chew, swallow or clench your teeth, your teeth experience immense pressure. Under normal circumstances, teeth are designed to absorb these forces. However, for those who suffer from bruxism (chronic nocturnal teeth grinding) or have a misaligned bite, the forces become unbalanced.
As the top surfaces of the teeth grind forcefully against one another, the tooth flexes on one side. Most of this bending stress accumulates at the narrowest point of the tooth: the cervical region right at the gumline. Over time, this repetitive flexing causes the microscopic crystalline structures of the enamel and dentin to fracture and flake away, leaving deep, wedge-shaped notches that are painful.
The diagnostics
Due to the fact that abrasion, erosion and abfraction can happen simultaneously, dentists often face a tangled web when diagnosing a patient. A patient might grind their teeth at night (abfraction), drink lemon water every morning (erosion) and scrub aggressively to get rid of the sensitivity (abrasion). This compounding effect is known as tooth wear of multifactorial origin. However, with visual examination, dentists can tell what the causes are and which type of conditions are involved.
The most crucial fact about all three conditions is that your enamel cannot grow back. Once it is lost, the underlying dentin, which contains thousands of microscopic pathways leading directly to the tooth's nerve, is exposed. This leads to chronic sensitivity, an increased risk of cavities and, in severe cases, structural failure of the tooth. In conclusion, the solution lies in your daily habits:
Switch to soft brushing: Always use a soft- or extra-soft-bristled toothbrush. Hold the brush with your fingertips rather than your fist to reduce the pressure and the simplest way to brush teeth is using the gentle circular and sweeping technique, whereby you angle your tooth brush 45 degrees to the tooth surface and sweep motions.
Neutralise acid: If you drink soda, coffee or wine, do not sip them over hours. Use a straw to bypass the teeth and rinse your mouth with water immediately afterwards. Crucially, wait at least 30 minutes before brushing your teeth to allow your saliva to naturally remineralise the enamel.
Protect against bruxism: If you wake up with a sore jaw or have signs of abfraction, talk to your dentist about a custom-moulded nightguard to distribute the forces of nocturnal grinding safely during sleep.