Figure 14 - Tooth UL4 (24) has previously been root treated (and obturated with silver points) but is symptomless.
From the following article
Verifiable CPD Paper:
Endodontics: Part 2 Diagnosis and treatment planning
P Carrotte
British Dental Journal 197, 231 - 238 (2004) Published online: 11 September 2004
doi:10.1038/sj.bdj.4811612
However, the tooth now requires a full crown restoration. A decision must be made as to whether the tooth should be re-treated before fitting the advanced restoration.