C‐shaped root canals in mandibular second molars in a Chinese population

Dental Traumatology - Tập 4 Số 4 - Trang 160-163 - 1988
Zu‐Pyn Yang1, Shu‐Fen Yang1, Yi‐Chu Lin1, J S Shay1, Ching-Chi Chi1
1Dental Department, Veterans General Hospital, Yang-Ming Medical College, and Chang-Gung Memorial Hospital, Taiwan, Republic of China

Tóm tắt

Abstract The purpose of this investigation was to study the prevalence of C‐shaped roots, root canal orifices, and root canals in the mandibular second molars of a Chinese population. A total of 581 second mandibular molars were collected in Hong Kong and Taiwan. The teeth were demineralized and placed in methyl salicylate to induce transparency. The pulp chamber floor was examined to ascertain the number of root canal orifices. Chinese ink was then injected into the root canal system to demonstrate the root canal anatomy. The mandibular second molars had separate roots in 66.4%, cone‐shaped roots in 2.1% and C‐shaped roots in 31.5%. The C‐shaped roots had C‐shaped canal orifices in 68.3% (21.5% of whole material). True C‐shaped root canals were observed in 65.8% of the teeth with C‐shaped orifices and in 13.9% of the whole material. Separate root canals were seen in 34.2% of the teeth with C‐shaped orifices. Separate canal orifices were found in 31.7% of the C‐shaped roots and 7.4% of these roots had true C‐shaped canals. In the whole material 0.9% of the roots with individual canal orifices had C‐shaped canals. In conclusion, C‐shaped root canals were common in mandibular second molars in the Chinese subjects studied. The C‐shaped root canals were often, but not always recognized because of a C‐shaped canal orifice.

Từ khóa


Tài liệu tham khảo

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10.1111/j.1600-9657.1986.tb00131.x

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Dental Traumatology

Tập 4 Số 4

160-163

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