Root canals were classified according to Vertucci's classification. RESULTS: 7.2% of mandibular first premolars(5/69) and 5.3% of mandibular second premolars(5/93) in buccolingual directions had curved root canals. There were no significant difference between two groups(p>0.05).
Methods: 148 root canals from 58 elderly patients' teeth were randomly chosen, which were divided into two groups: vital teeth (group A) and teeth requiring retherapy (group B).
Results: For group A, 74.7% of root canals had a longer working length after preparation than before, while, for group B, there was no significant difference.
Methods:Clinical treatment using therapeutic alliance of root tube and Ieave the tube empty. using glue paste to stuff wide root tube teeth,using drug paste to stuff thin root tube teeth.
Methods use root tube drainage or toot tube treating after opening a window in apical labium,conservative treatment on apical cyst,use the root tube filling agent suitable filling.
Results Secondary infection of the root tubes,apex overfilled and peripheral mechanical injury were main failure factors in the treatment of root tubes.
Methods The failure factors were analyzed in 148 teeth treated in the root tubes of teeth. After sterilized, the root tubes of the teeth were refilled into the compound plaster with metromidazole.
During root canal treatment, 0.15% benzydamine HCl for pain and 0.12% chlorhexidine gluconate were used for the intracanal dressing and, as a base of the root canal sealer, sealapex, which is Ca(OH)2 based, was used.
During root canal treatment, 0.15% benzydamine HCl for pain and 0.12% chlorhexidine gluconate for intracanal cleaning were used be fore the placement of the root canal sealer (Sealapex, Ca(OH)2 based).
Fifty-one sites of periodontitis, 15 periodontal abscesses, 14 sites of dental caries with root canal infection, 23 sites of dental caries without root canal infection, and seven necrotic pulps were found by dental examination.
We treated 32 patients with low-grade (>amp;lt;30%) isthmic spondylolisthesis at L5-S1 with selective instrumentation, reduction of the slip, resection of the pseudoarthrosis adding autologous bone grafting and decompressing the root canal.
Furthermore, gender and the number of teeth with the apical end of the root canals completely closed (N0) showed a significant correlation with chronological age.