Department of Endodontics, School of Dentistry, Medipol Mega Dental Hospital, Istanbul Medipol University, TEM Avrupa Otoyolu Goztepe No: 1, Bagcilar, Istanbul, 34214, Turkey.
Department of Endodontics School of Dentistry, Istanbul University-Cerrahpasa, Kocamustafapasa Cad. No: 34/E, Cerrahpasa, Fatih, Istanbul, 34098, Turkey.
BMC Oral Health. 2023 Jun 19;23(1):403. doi: 10.1186/s12903-023-03107-7.
Teeth may have additional roots and a different number of root canals. Overlooked root canals may cause endodontic failure. The aim of this study was to investigate the prevalence of root canals and the number of roots of premolars in a selected Turkish population.
A total of 2,570 teeth from 1,438 patients were evaluated. The cone-beam computed tomography scans of 1,055 maxillary and 1,515 mandibular premolars were examined.
Type IV root canal morphology was observed most frequently in maxillary first premolars (77%), and the rates of single and double channel formations were very similar (51% and 49%, respectively). Of the second maxillary premolars, 57.4% had Type I morphology, and 89.9% of the teeth were single-rooted, while 68.6% had a single root canal. The most common formation was Type I (85%) among mandibular first premolars, and a single root was observed in 95.6% of these teeth. In addition, 87% of the mandibular first premolars had a single root canal. The second mandibular premolars mostly had Type I (95.4%) formation, and 99.3% of the teeth were single-rooted, while 96.9% had a single root canal.
According to our findings, 51% of maxillary first premolars had a single root, 79.4% had two root canals, and 77% had Type IV (77%) formation. Maxillary second premolars mostly had Type I formation. In addition, a single root and single root canal formation were most common. Mandibular first premolars generally had a single root and single root canal formation, but 13% had two root canals, and 6.4% had Type V formation. More than 95% of mandibular second premolars had Type I formation.
牙齿可能有额外的根和不同数量的根管。被忽视的根管可能导致根管治疗失败。本研究的目的是调查土耳其人群中前磨牙的根管数量和根数。
共评估了 1438 名患者的 2570 颗牙齿。检查了 1055 颗上颌前磨牙和 1515 颗下颌前磨牙的锥形束 CT 扫描。
上颌第一前磨牙最常观察到 IV 型根管形态（77%），单双根管形成率非常相似（分别为 51%和 49%）。上颌第二前磨牙中，57.4%为 I 型形态，89.9%为单根，68.6%有单根管。下颌第一前磨牙最常见的形态为 I 型（85%），这些牙齿中有 95.6%为单根。此外，87%的下颌第一前磨牙有单根管。下颌第二前磨牙大多为 I 型（95.4%），99.3%的牙齿为单根，96.9%有单根管。
根据我们的发现，51%的上颌第一前磨牙为单根，79.4%有两个根管，77%为 IV 型（77%）形成。上颌第二前磨牙多为 I 型形成。此外，单根和单根管形成最为常见。下颌第一前磨牙通常为单根和单根管形成，但有 13%有两个根管，6.4%有 V 型形成。超过 95%的下颌第二前磨牙为 I 型形成。
