Tooth discoloration is common following root canal treatment; nonetheless, the exact causes for this are not totally understood. Failure to totally clean out the necrotic soft tissue of the pulp framework may cause staining, and certain root canal materials can also cause staining. Another conceivable factor is that the lack of pulp weight in dentinal tubules once the pulp is expelled leads to incorporation of dietary stains in dentin.
Several randomized clinical trials concluded that the utilization of rotary instruments is associated with a lower incidence of pain following the endodontic procedure when compared to the utilization of manual hand instruments. Instruments may separate during root canal treatment, meaning a portion of the metal document used during the procedure remains inside the tooth. The record fragment may be abandoned if an acceptable dimension of cleaning and shaping has already been finished and attempting to evacuate the portion would risk damage to the tooth. While potentially disconcerting to the patient, having metal inside of a tooth is relatively common, for example, with metal posts, amalgam fillings, gold crowns, and porcelain fused to metal crowns.
The event of record separation is proportional to the narrowness, curvature, length, calcification and number of roots on the tooth being treated. Complications resulting from incompletely cleaned canals, because of blockage from the separated document, can be addressed with surgical root canal treatment. A sodium hypochlorite incident is an immediate reaction of extreme pain, trailed by edema, haematoma and ecchymosis, as a consequence of the solution escaping the confines of the tooth and entering the periapical space. This may be caused iatrogenically by binding or over the top weight on the irrigant syringe or it may happen if the tooth has an unusually large apical foramen. It is usually self-resolving and may take two to five weeks to fully resolve.