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Evaluate root and canal morphology of primary mandibular second molars in Chinese individuals by using cone-beam computed tomography.
J Formos Med Assoc. 2013 Jul; 112(7):390-5.JF

Abstract

BACKGROUND/PURPOSE

More detailed knowledge of root and canal morphology is important in order to improve the success in the endodontics of primary teeth. The purpose of this study was to evaluate the root and canal morphology of primary mandibular second molars (PMSMs) in a Chinese population using cone-beam computed tomography (CBCT).

METHODS

CBCT images, which had been obtained previously in the West China Hospital of Stomatology at Sichuan University, Chengdu, China between May 2009 and December 2011, were screened retrospectively. Finally, 283 individuals-207 male and 76 female with a mean age of 7.2 years (range 3-10 years)-and 487 PMSMs with clear images of root and canal morphology were enrolled. The number of roots and morphology of canals were recorded. The patient's gender, and the symmetry and frequency of three roots in PMSMs were analyzed.

RESULTS

The majority of PMSMs had two (72.28%) or three roots (27.52%). The symmetrical incidence of three-root PMSMs in this Chinese population was 50.65%. There is no difference between genders in the prevalence of an extra root and the incidence of symmetry (p > 0.05). Of the individuals enrolled, 25.26% of PMSMs had three canals and 73.31% had four canals. The root canal systems of the PMSMs in the present study were categorized into seven variants.

CONCLUSION

This study indicated that three-rooted PMSMs occur frequently in the Chinese population. There was no difference between the two genders on incidence and symmetry. The majority of PMSMs have three to four canals and the diversity of the root canal variants should be considered when performing clinical procedures. CBCT is a good option for studying the root and canal morphology of primary teeth.

Authors+Show Affiliations

State Key Laboratory of Oral Diseases, West China College of Stomatology, West China Hospital of Stomatology, Sichuan University, Chengdu, ROC.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23927978

Citation

Yang, Ran, et al. "Evaluate Root and Canal Morphology of Primary Mandibular Second Molars in Chinese Individuals By Using Cone-beam Computed Tomography." Journal of the Formosan Medical Association = Taiwan Yi Zhi, vol. 112, no. 7, 2013, pp. 390-5.
Yang R, Yang C, Liu Y, et al. Evaluate root and canal morphology of primary mandibular second molars in Chinese individuals by using cone-beam computed tomography. J Formos Med Assoc. 2013;112(7):390-5.
Yang, R., Yang, C., Liu, Y., Hu, Y., & Zou, J. (2013). Evaluate root and canal morphology of primary mandibular second molars in Chinese individuals by using cone-beam computed tomography. Journal of the Formosan Medical Association = Taiwan Yi Zhi, 112(7), 390-5. https://doi.org/10.1016/j.jfma.2012.10.008
Yang R, et al. Evaluate Root and Canal Morphology of Primary Mandibular Second Molars in Chinese Individuals By Using Cone-beam Computed Tomography. J Formos Med Assoc. 2013;112(7):390-5. PubMed PMID: 23927978.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluate root and canal morphology of primary mandibular second molars in Chinese individuals by using cone-beam computed tomography. AU - Yang,Ran, AU - Yang,Chan, AU - Liu,Yuan, AU - Hu,Yong, AU - Zou,Jing, Y1 - 2012/11/20/ PY - 2012/06/10/received PY - 2012/10/03/revised PY - 2012/10/11/accepted PY - 2013/8/10/entrez PY - 2013/8/10/pubmed PY - 2014/4/26/medline KW - cone-beam computed tomography KW - primary mandibular second molars KW - root and canal morphology SP - 390 EP - 5 JF - Journal of the Formosan Medical Association = Taiwan yi zhi JO - J. Formos. Med. Assoc. VL - 112 IS - 7 N2 - BACKGROUND/PURPOSE: More detailed knowledge of root and canal morphology is important in order to improve the success in the endodontics of primary teeth. The purpose of this study was to evaluate the root and canal morphology of primary mandibular second molars (PMSMs) in a Chinese population using cone-beam computed tomography (CBCT). METHODS: CBCT images, which had been obtained previously in the West China Hospital of Stomatology at Sichuan University, Chengdu, China between May 2009 and December 2011, were screened retrospectively. Finally, 283 individuals-207 male and 76 female with a mean age of 7.2 years (range 3-10 years)-and 487 PMSMs with clear images of root and canal morphology were enrolled. The number of roots and morphology of canals were recorded. The patient's gender, and the symmetry and frequency of three roots in PMSMs were analyzed. RESULTS: The majority of PMSMs had two (72.28%) or three roots (27.52%). The symmetrical incidence of three-root PMSMs in this Chinese population was 50.65%. There is no difference between genders in the prevalence of an extra root and the incidence of symmetry (p > 0.05). Of the individuals enrolled, 25.26% of PMSMs had three canals and 73.31% had four canals. The root canal systems of the PMSMs in the present study were categorized into seven variants. CONCLUSION: This study indicated that three-rooted PMSMs occur frequently in the Chinese population. There was no difference between the two genders on incidence and symmetry. The majority of PMSMs have three to four canals and the diversity of the root canal variants should be considered when performing clinical procedures. CBCT is a good option for studying the root and canal morphology of primary teeth. SN - 0929-6646 UR - https://www.unboundmedicine.com/medline/citation/23927978/Evaluate_root_and_canal_morphology_of_primary_mandibular_second_molars_in_Chinese_individuals_by_using_cone_beam_computed_tomography_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0929-6646(12)00505-0 DB - PRIME DP - Unbound Medicine ER -