Impacts of Missing Molars: Should You Consider Dental Implants? - Dentistry

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Molar tooth loss


Today, I had my upper second molar extracted.
After consulting with the dentist about whether I need an implant, the dentist said it wasn't necessary.
However, I started to wonder if not replacing the missing tooth would affect the occlusion with my lower teeth.
I've heard that if a lower tooth is extracted and not replaced, the upper tooth will continue to grow downwards.
In the opposite situation, will the lower teeth grow upwards if the upper tooth is missing? After the extraction, I feel a bit regretful and wonder if I should have opted for a root canal treatment instead, considering I don't have wisdom teeth to replace it.

Chen, 20~29 year old female. Ask Date: 2021/10/28

Dr. Lin Jiayong reply Dentistry


Hello: If the lower teeth are in contact with the upper first molar, they will not move upward anymore.
There are reasons for tooth extraction, so it is important to trace back to the underlying cause of why you need to have a tooth extracted.
Additionally, not every problematic tooth is suitable for root canal treatment; performing root canal therapy on a tooth that is not originally suitable for treatment will also be ineffective.
This is a response from Dr.
Lin Chia-yung, Department of Dentistry, Taichung Hospital, Ministry of Health and Welfare.

Reply Date: 2021/10/28

More Info


Missing molars can have significant implications for your oral health, and considering dental implants is often a prudent choice. When you lose a tooth, particularly a molar, it can lead to a cascade of dental issues that affect not only the immediate area but also your overall dental structure.

Firstly, let's address the concern about opposing teeth. When a molar is extracted, the opposing tooth (in this case, the upper molar) can indeed begin to over-erupt. This is because teeth are naturally inclined to maintain contact with one another. If the opposing tooth is not countered by a corresponding tooth below, it may continue to grow downwards, which can lead to misalignment and bite issues. Conversely, if the lower molar is missing, the upper molar may drift upwards, which can also disrupt your bite and lead to further complications.

The loss of a molar can also affect your chewing efficiency. Molars are crucial for grinding food, and without them, you may find it more challenging to chew properly. This can lead to digestive issues, as food that is not adequately chewed can be harder for your stomach to process. Additionally, the absence of a molar can lead to shifting of adjacent teeth, which can create gaps and misalignment over time. This shifting can result in further tooth loss, gum disease, and even jaw problems.

Another important aspect to consider is bone health. The jawbone requires stimulation from the roots of teeth to maintain its density. When a tooth is lost, the bone in that area can begin to resorb, leading to a decrease in bone volume. This can make it more challenging to place dental implants in the future, as sufficient bone is necessary to support the implant securely. If you are considering implants down the line, it may be beneficial to explore options for bone grafting to preserve the bone structure.

Regarding your situation, it’s understandable to feel regret after having a tooth extracted, especially when considering the potential for root canal treatment instead. Root canal therapy can often save a tooth that is infected or damaged, allowing you to retain your natural tooth structure. However, if the tooth was deemed non-restorable or if there were other complicating factors, extraction may have been the best option.

If your dentist has advised against immediate implants, it may be due to the condition of your jawbone or other factors that need to be assessed. It’s essential to have a thorough evaluation, including imaging studies, to determine the best course of action. If you are concerned about the long-term effects of your extraction, consider seeking a second opinion from a dental specialist, such as a periodontist or an oral surgeon, who can provide more insight into your specific situation.

In conclusion, while it may not always be necessary to replace a missing molar immediately, doing so can prevent a host of dental issues down the line. If you are experiencing feelings of regret, it’s worth discussing your options with your dentist, including the possibility of dental implants or other restorative solutions. Maintaining your oral health is crucial, and addressing missing teeth proactively can help preserve your overall dental structure and function.

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