root canal retreatment
Root canal retreatment article follows article about root canal treatment that is one of the most sophisticated dental treatments available. Most root canal treatments, or root canal therapy, are successful at first try. Research studies show that the success rate of endodontic treatment is very high, at around 90%. However, in some dental cases root canal treatment may require some repairs.
The most important causes of root canal failure
Errors may have been made by by the dentist during the initial root canal treatment. These errors include breakage of a tool in the dental canal, weakening or puncturing a part of the root, improper filling of the canal, and so on. In such cases, the endodontist will try to resolve these problems by performing a root canal retreatment.
The narrow or curved canals of the root of the tooth sometimes cause complications
There is a chance that in the initial treatment process of root canal, complex anatomy of the root canal has not been identified. Number of channels in each tooth is not a fixed and predetermined number. Rather this number varies for each tooth and each person. This is especially true for molar teeth. This complexity in canal anatomy, in the initial treatment, can cause one or more canals to be hidden from the dentist’s eyes and part of the root canal remains untreated.
Post root canal treatment
After root canal treatment, delay in proper post-root canal restoration and placing the temporary dental implant retention for long periods can cause re-inflammation in the root canal.
Furthermore, saliva leakage into the root canal may cause infection if the root canal is not repaired properly. Also, some teeth that have undergone root canal treatment many years ago may have problems again. In some cases, even with the proper tooth treatment, the treated root develops new caries, which causes the root canal to become infected again. Sometimes the tooth becomes fractured.
Occurrence of any of these mentioned factors causes invasion of bacteria and contaminants into the root canal space, which in turn causes infection and inflammation of the mandibular bone in the area below the root canal. This inflammation causes tooth marks. Symptoms include uneasiness, toothache, and in some cases pain. However, in some cases, the inflammation does not cause symptoms but can cause chronic infection, which is often seen in the radiographic image as a small black area around the root end of the infected tooth. These problems may therefore endanger teeth that have already had successful root canal treatment.
Unsuccessful dental root therapy and root retreatment
However, this does not mean that the tooth is about to die and needs to be pulled out. In most cases, unsuccessful root canal treatments can be re-treated. Root retreatment may be the best option for dental preservation. It should be kept in mind that root retreatment is more complex than primary treatment and requires specific therapeutic techniques and is therefore strongly recommended by professionals.
Although in most cases, retreatment involves the same process as the initial root canal treatment, more time is needed to remove the filling material in the previous treatment. During root canal retreatment, the tooth is re-opened and the filling material inserted into the root canal is removed using special tools.
An endodontist examines the tooth carefully and looks for possible extra channels and causes of primary treatment failure. The tooth canal is reshaped and cleaned removing the factors that led to infection in the initial treatment. After making sure the inflammation and its associated symptoms are resolved, the root canal is replenished. Finally after the end of root canal retreatment, the access cavity in the tooth crown needs refilling and in most cases new coatings.
Long-term research studies show that the success rate of root canal retreatment is about 88%. Also extensive research emphasizes as long as it is possible to maintain a natural tooth, tooth extraction is not recommended to replace it with dental implants.