For a long time, if toothbrushes are always used horizontally, it can indeed have a series of adverse effects on our dental health. Firstly, the lateral brushing method is prone to wear down the neck of the teeth, which is the weak area at the junction of enamel and dentin, known as the "wedge-shaped defect". Over time, this wear and tear will gradually deepen, leading to tooth sensitivity and strong reactions to stimuli such as cold, hot, sour, and sweet. It may even cause pulpitis or periapical periodontitis, causing unbearable pain to patients.

Secondly, horizontal brushing is also difficult to effectively remove food residue and plaque between teeth, which are the main culprits causing dental caries and periodontal disease. In the long run, this not only increases the risk of dental caries, but may also lead to gum recession, alveolar bone resorption, and ultimately affect the stability of teeth, resulting in loose or even falling teeth.

To improve this situation, it is recommended to use the Babbitt brushing method, which involves gently shaking and brushing the surface and gaps of the teeth at a 45 degree angle, while also ensuring the cleanliness of the tongue and oral walls. In addition, regularly replacing toothbrushes, choosing soft bristled and small headed toothbrushes, and using fluoride toothpaste can effectively protect dental health and reduce injuries caused by improper brushing methods. Remember, proper brushing habits and regular oral check ups are essential components in maintaining oral health.