Impacted Canines

Impacted Canines

An impacted tooth simply means that it is “stuck” and cannot erupt into function. Patients frequently develop problems with impacted third molar (wisdom) teeth. These teeth get “stuck” in the back of the jaw and can develop painful infections, among a host of other problems, as mentioned in the wisdom tooth section. Since there is rarely a functional need for wisdom teeth, they are usually extracted if they develop problems. The maxillary cuspid (upper canine) is the second most common tooth to become impacted. The cuspid tooth is a critical tooth in the dental arch and plays an important role in your “bite”. The cuspid teeth are very strong biting teeth and have the longest roots of any human teeth. They are designed to be the first teeth that touch when your jaws close together so they guide the rest of the teeth into the proper bite.

Normally, the maxillary cuspid teeth are the last of the “front” teeth to erupt into place. They usually come into place around age 13 and cause any space left between the upper front teeth to close tighter together. If a cuspid tooth gets impacted, every effort is made to get it to erupt into its proper position in the dental arch. The techniques involved to aid eruption can be applied to any impacted tooth in the upper or lower jaw, but most commonly they are applied to the maxillary cuspid (upper eye) teeth. Sixty percent of these impacted cuspids are located on the palatal (roof of the mouth) side of the dental arch. The remaining impacted cuspids are found in the middle of the supporting bone, but are stuck in an elevated position above the roots of the adjacent teeth, or are out to the facial side of the dental arch.

Early Recognition of Impacted Canines Is the Key to Success

The older the patient the more likely an impacted canine will not erupt by natural forces alone, even if the space is available for the tooth to fit in the dental arch. The American Association of Orthodontists recommends that a panoramic x-ray, along with a dental examination, be performed on all dental patients at the age of seven to count the teeth and determine if there are problems with eruption of the adult teeth. It is important to determine whether all the adult teeth

are present or if some adult teeth missing.

This exam is usually performed by your general dentist who will refer you to an orthodontist if a problem is identified. Treating such a problem may involve an orthodontist placing braces to open spaces allowing for proper eruption of the adult teeth. Treatment may also require referral to an oral surgeon for extraction of over-retained baby teeth and/or selected adult teeth that are blocking the eruption of the all-important cuspid. The oral surgeon will also need to remove any extra teeth (supernumerary teeth) or growths that are blocking the eruption of any adult teeth.

If the eruption path is cleared and the space is opened up by age 11-12, there is a good chance that the impacted cuspid will erupt with nature’s help. If the cuspid is allowed to develop too much under the surface (by age 13-14), the impacted cuspid will not erupt by itself, even with the space cleared for its eruption. If the patient is older (over 40), there is a much higher chance that the tooth will be fused in position. In these cases, the tooth will not budge despite all the efforts of the orthodontist and oral surgeon to erupt it into place. Sadly, the only option at this point is to extract the impacted tooth and consider an alternate treatment to replace it in the dental arch.

What Happens If the Canine Will Not Erupt When Proper Space Is Available?

In cases where the cuspid will not erupt spontaneously, the orthodontist and oral surgeon will work together to get these teeth to erupt. Each case must be evaluated on an individual basis, but treatment will usually involve a combined effort between the orthodontist and the oral surgeon. The most common scenario will call for the orthodontist to place braces on the teeth (at least the upper arch). A space will be opened to provide room for the impacted tooth to be moved into its proper position in the dental arch. If the baby cuspid has not fallen out already, it is usually left in place until the space for the adult cuspid is ready. Once the space is ready, the orthodontist will refer the patient to the oral surgeon to have the impacted cuspid exposed and bracketed.

In a simple surgical procedure performed in the surgeon’s office, the gum on top of the impacted tooth will be lifted up to expose the hidden tooth underneath. If there is a baby tooth present it will be removed at the same time. Once the tooth is exposed, the oral surgeon will bond an orthodontic bracket to the exposed tooth. The bracket will have a miniature gold chain attached to it. The oral surgeon will guide the chain back to the orthodontic arch wire where it will be temporarily attached. Sometimes the surgeon will leave the exposed and impacted tooth completely uncovered by suturing the gum up high above the tooth, or making a window in the gum covering the tooth. Most of the time the gum will be returned to its original location and sutured back with only the chain remaining visible as it exits a small hole in the gum.