Article:

When performing conventional crown lengthening, the existing margins of an old restoration or the cementoenamel junction (CEJ) of a non-restored tooth are used to determine necessary bone removal to establish adequate space for biologic width. Creating proper space for biologic width ensures that the new margin will not infringe upon the periodontal complex and reduces the likelihood for future inflammation. One significant problem of this procedure is that, at times, significant bone must be removed. This can weaken the stability of the tooth or create a weakened and vulnerable furcation area. The more bone removed in the furcation, the greater the likelihood of future problems with maintenance. It is critical to preserve as much bone as possible to support the tooth, especially in the furcation area.