Maxillary Second Bicuspid

The most common root configuration in maxillary second bicuspids is a single root, occurring approximately 85 per cent of the time. You must remember that Type I canal configuration is most common, but Type II, III or IV may be present, with decreasing frequency. In approximately 15 per cent, two separate roots are present, each with a single canal. An extremely rare variant has three separate roots. There is a variation in the cervical cross section of maxillary second bicuspids, depending on

the canal configuration. If only one canal is present, the canal shape is slightly oval. If two canals are present, the canal shape resembles a ribbon or figure eight, as in the first bicuspid. The access preparation is exactly the same as that of maxillary first bicuspids. When only one canal is present, it is usually found easily in the center of the access preparation. When only one canal is found but it is not in the center of the tooth, it is probable that another canal is present and should be searched for on the opposite side.