There was more bone loss in the distal of #30 than in the mesial (Fig.2 *). Recently (1.5 years later) the patient returns with infection at #30 distally with severe bone loss (Fig.3 *). There are two distal roots (distobuccal and distolingual).
Xin Wei, DDS, PhD, MS 1st edition 03/21/2015, last revision 03/21/2015