在我们的一生中，我们有两套牙齿。这些是主要的（baby) teeth and成人teeth. People typically have 20 primary teeth and 32 adult teeth.
It’s also possible to have an extra, orsupernumerary, tooth. The most common type of extra tooth is called a mesiodens.
在两条前牙之间或后面或后面，上颌（前甲虫）的前部出现了一个介体incisors）。它通常是圆锥形的，与成人牙齿相比，与乳牙相比，发生的频率更高。
中碘是罕见的。尽管其流行率可能因位置和社区而异，但据估计会影响
当存在中碘时，重要的是要及时对待它。这是因为离开后来可能会引起牙齿问题。
The exact cause of mesiodens is still unknown. It’s possible that genetics, environmental factors, and changes during dental development may all play a role.
此外，中碘的发生与多种健康状况有关，例如：
- 唇裂
- 加德纳综合症, a rare genetic disorder that causes growths to appear on various parts of the body
- 克氏颅不良, a rare genetic condition that leads to unusual development of the bones and teeth
- orofaciodigital syndrome, a rare genetic condition that impacts the development of the mouth and teeth as well as facial features, fingers, and toes
It’s also possible for multiple mesiodens to appear, although this is less common. When this happens, it’s called mesiodentes.
拥有中碘会导致各种潜在的牙齿并发症。让我们探索其中的一些。
Interference with other teeth
One of the main complications of mesiodens is interference with surrounding teeth. This can happen in a variety of different ways, including:
- delayed eruption of surrounding teeth
- 周围牙齿的位移
- 中等区域的拥挤增加
- misalignment of teeth (malocclusion) or problems with bite
- formation of adiastema，或空间，在您的两个前牙之间
- dilaceration of surrounding teeth, which is where the root or crown of a tooth has an abnormal bend
- root吸收周围的牙齿，这是牙齿的根结构溶解的地方
Interference of a mesiodens with surrounding teeth can lead to the necessity of future dental or orthodontic treatments. That’s why it’s important to identify and treat a mesiodens as early as possible.
Cyst formation
A cyst is a sac of fluid that forms in the body. When a mesiodens remains un-erupted (受影响), it can lead to the formation of a type of cyst called adentigerous cyst。
Generally speaking, a small dentigerous cyst won’t cause symptoms. However, if the cyst begins to get larger, it may cause problems like swelling or displacement of surrounding teeth.
Eruption in the nasal cavity
在某些情况下，鼻腔可能会爆发鼻腔，而不是口腔。这是非常罕见的。
When a mesiodens erupts in the nasal cavity, it can cause several problems. These can include pain, swelling, and nasal obstruction.
Mesiodens are typically found during early childhood. In fact, they’re often detected during routinedental examinationsandX-rays。
Mesiodens are typically associated with adult teeth instead of baby teeth. As such, they may often, but not always, be observed around the time that these teeth are进来。最早可以开始age 6。
A mesiodens that’s erupted into the mouth can be detected by a dentist during a dental examination. You may even notice it on your own, prompting a visit to the dentist.
但是，关于79％至91％of mesiodens remain impacted. Some signs that an impacted mesiodens may be present include crowding, misalignment of teeth, and delayed eruption of surrounding teeth.
当对中碘的影响时，可以通过使用牙科X射线来找到它。您的牙医可能会从几个不同角度收集X射线图像以诊断中碘。
中碘的管理通常涉及extraction。但是，在某些情况下，例如中碘是肉牙，并且不会引起并发症，牙医可能建议看它。
During an extraction, your dentist will carefully remove the mesiodens. There are two types of extraction:
- 简单的。In a simple extraction, a tooth is removed without any incisions. The dentist will typically use a tool to grip the tooth and loosen it. This type of procedure can often be carried out at your dentist’s office.
- 外科。在更复杂的情况下，例如受影响的牙齿，需要手术提取。这是由口腔外科医生完成的，将涉及切口和针迹。由于大多数中碘受到影响，因此可能需要通过外科手术去除它们。
Generally speaking, extraction is carried out shortly after diagnosis rather than waiting until a child is older. This is to prevent the mesiodens from causing future complications with surrounding teeth.
但是，早期去除中碘与自身的风险有关。提取可能会损害周围成年牙齿的区域。发生这种情况时，这些牙齿的喷发可能会延迟。
Because of this, your dentist will continue to carefully monitor your teeth following the extraction of a mesiodens. This is to make sure that other surrounding adult teeth come in properly.
对于有中等的人来说，这也不少见orthodontictreatment following extraction. This is typically to correct alignment, positioning, or spacing of the surrounding teeth.
The cost of an extraction can vary and is highly dependent on your location. According to theConsumer Guide to Dentistry，平均成本可能从130美元到400美元不等。
A simple extraction of a tooth that’s already erupted can cost between $100 to $250. Surgical extraction of teeth that are still impacted costs more, between $180 and $400, but deeply embedded teeth may drive the cost up to $600 or higher.
Many dental insurance plans will cover an extraction if it’s considered to be medically necessary. Contact your dental insurance provider prior to an extraction to get an idea of how much you may be responsible for paying.
Most of the time, mesiodens are detected and treated during childhood. However, it may be possible that a mesiodens remains diagnosed or untreated into adulthood.
If you can’t see the mesiodens in your mouth, you may be able to identify it if your front teeth have:
- grown in at an abnormal angle or position
- 他们之间的明显差距
- misalignment
- crowding
- 根本不成长
If you suspect that you may have a mesiodens, make an appointment with a dentist. They can perform a dental examination and X-rays to help determine whether a mesiodens is present.
Because mesiodens are typically diagnosed and treated at an earlier age, it’s possible that you may need more extensive dental or orthodontic procedures to help correct any dental issues that have occurred due to a mesiodens.
中碘是一个额外的牙齿，位于两个前齿后面或之间。通常在成年牙齿开始进来的时候在童年时期发现它。
当未经治疗的情况下，中碘会导致牙齿并发症。这通常会干扰附近的牙齿，导致拥挤，错位和延迟喷发。
Mesiodens is typically treated using an extraction shortly after diagnosis. It’s possible that additional dental or orthodontic treatments may be needed after mesiodens removal.
See a dentist if you believe that you or your child has a mesiodens. Prompt diagnosis and treatment can help to prevent future dental complications.