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Often use your teeth to bite hard objects? You can't feel your teeth if you crack

Many people rely on their own teeth and often "fight hard"

Long-term use of teeth to bite walnuts, eat crabs...

But our teeth are much weaker than imagined

If you develop the habit of biting hard objects

Although I didn't feel the toothache at first

But the teeth may have cracked quietly

When the tooth hurts heavier, it hurts terribly

Understand the damage caused by hard objects to teeth

We have to get to know

Cracked tooth and longitudinal root crack

Cracked tooth

Tooth cracks are small, non-physical, non-physiological cracks that occur on the surface of the crown of the tooth. Cracked teeth are occult and difficult to diagnose. Even if it is diagnosed and treated, the effect is difficult to guarantee.


1. Internal factors

The shape, thickness and structure of each part of the tooth are different, and the ability to resist external forces is also different. Teeth with high-point and steep slopes due to uneven wear will receive a large horizontal force during occlusion, which is very destructive to the teeth.

2. External cause

Suddenly encountering gravel, bone residue, etc. during chewing will suddenly increase the bite force of a certain tooth. This sudden increase of bite force can easily cause damage to the hard tissues of the tooth, including cracks. The impact of external force on the teeth and iatrogenic injury in the accident will also cause the teeth to crack.


Cracks are difficult to detect with the naked eye. It mostly occurs in the first molars, followed by the second molars and premolars.

The performance is different in different periods. In the early stage, it is limited to the enamel and has no symptoms. As the crack deepens, it extends to the dentin, involves the pulp and even causes the fracture of the tooth. Various toothaches will occur, such as excitation pain, spontaneous pain, and bite. Pain etc.


1. Prevention

·Eliminate occlusal trauma: Long-term uneven wear will cause high and steep tooth tips and sharp edge ridges. This kind of teeth tends to break easily even during normal chewing, or cause soft tissue bites. After the inspection is found, it should be adjusted and eliminated.

·Balance bite force: In addition to the teeth, some patients have many problems with other teeth. Comprehensive treatment should be done so that the bite force of the whole mouth is shared by most teeth to prevent individual teeth from being overburdened and cracked.

2. Treatment

Different treatments are carried out according to the different depth of the hidden crack line.

Longitudinal root fracture

Longitudinal root fracture refers to the longitudinal fracture that occurs in the root of the tooth. Once it occurs, the prognosis is very poor, and complex treatments and even removal are often required. The patients are mostly middle-aged and elderly people.


1. Internal factors

The first molar has the highest probability of root cracking, because the first molar has the greatest bite force. Therefore, people who like to eat hard foods (sugar cane, broad beans, toffee, biscuits, etc.) are most likely to have longitudinal root cracks.

2. External cause

Trauma: Excessive bite force, lateral force and sudden impact force from hard objects during chewing may cause root cracks.

Iatrogenic: "Pulpless teeth", excessive root canal preparation, excessive root filling pressure, and root canal posts can easily lead to longitudinal root fractures.


Patients often have the habit of biting hard objects. The affected tooth may have the manifestations of endodontic disease and periapical disease, such as hot and cold irritation, spontaneous pain, chewing pain, etc.; it may also have periodontal disease, such as weak bite, looseness, and often periodontal swelling. .
Most of the affected teeth are molars. They may have towering cusps, they may have root canal treatments, and they may have root canal posts and crown restorations. Because the damage occurs in the deep root of the tooth, it is not easy to find out on inspection. X-ray dental film plays an important role in diagnosis.


The prognosis of root fractured teeth is poor. Therefore, the treatment method of complete or partial removal is usually used. After the alveolar bone is stabilized, the dentition is restored by dentures, implants and other methods to restore tooth function.

China Digital Dental Lab remind you The teeth should be used moderately, like beer lids, walnut shells...Usually it takes effort to open with hands and tools, not to mention the teeth? No matter how good the tooth is, you can't bite hard. Use tools to assist you when necessary. If you bite a hard object that causes tooth pain, you must seek medical attention in time.
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