Can Tooth No. 8 Be Filled? Should a Wisdom Tooth Be Filled or Extracted?

Hello, regarding your question about filling tooth No. 8, this is a rather specific issue in dentistry because it involves wisdom teeth – teeth with a structure and position that are very different from the other teeth. The doctor explains as follows:

What is tooth No. 8? What role does it play?

Tooth No. 8, also known as the wisdom tooth, is the last tooth to erupt in the dental arch, usually appearing between the ages of 17 and 25. It is the third molar, located deep within the oral cavity.

In terms of function, tooth No. 8 does not play an important role in chewing, particularly in modern humans, whose jaw structures are smaller than they were in the past. In fact, many cases involve wisdom teeth that erupt at an angle, become impacted, or fail to erupt completely, making them prone to inflammation and potentially affecting adjacent teeth.

For this reason, in many dental indications, tooth No. 8 is not prioritized for preservation at all costs like other teeth. This also directly affects the decision of whether to fill tooth No. 8.

Can a decayed tooth No. 8 be filled?

The doctor confirms that tooth No. 8 can be filled, but not every case should undergo this procedure.

If the tooth No. 8 has erupted straight, is not impacted or tilted, has an opposing tooth in occlusion, and the cavity is small and has not affected the pulp, it is entirely possible to perform a filling to preserve the tooth. In this case, filling tooth No. 8 helps prevent the decay from spreading and preserve the tooth structure.

However, if the wisdom tooth is impacted or tilted, has pericoronitis, or the decay has extensively reached the pulp, filling is only a temporary measure and does not address the underlying cause. In these cases, the dentist will usually prioritize extraction to prevent long-term complications.

Why is filling tooth No. 8 generally not recommended?

In clinical practice, dentists often limit indications for filling tooth No. 8 due to several factors related to anatomy and function:

Difficult-to-access location

Tooth No. 8 is located at the very back of the mouth, limiting the dentist’s visibility and maneuverability. This makes it difficult to thoroughly remove decayed tissue and accurately shape the cavity, which can affect the durability of the filling.

Filling is prone to becoming dislodged

Because of its location, exposure to strong chewing forces, and the difficulty of controlling moisture during the procedure, fillings on tooth No. 8 are more likely to become dislodged or crack after a relatively short period of use.

Limited role in chewing

Unlike the main molars, tooth No. 8 does not play an important role in grinding food. Therefore, attempting to preserve it through repeated fillings often does not provide long-term functional value.

When should tooth No. 8 be filled and when should it be extracted?

The decision between filling tooth No. 8 and extracting it should be based on a clinical examination and X-ray imaging.

Filling is appropriate when the tooth has erupted straight, does not cause inflammation, can be cleaned properly, and the carious lesion is mild to moderate. In this case, filling helps preserve the tooth and avoid invasive intervention.

Conversely, if the tooth is tilted, crowded, causes recurrent gingival inflammation, has extensive decay, or affects the adjacent tooth No. 7, extraction is the optimal choice. Delaying treatment in these cases may lead to the spread of infection, prolonged pain, or bone loss.

If you are unsure whether your condition is suitable for filling tooth No. 8, you should visit a reputable facility such as Gangwhoo Cosmetic Hospital for X-ray imaging and an accurate assessment. Here, the dentist will recommend an appropriate treatment plan, and if you wish to improve the aesthetics of your smile, services such as teeth whitening are also performed safely, helping you achieve a more even, beautiful, and healthy set of teeth.