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High prevalence of taurodontism in North China and its relevant factors: a retrospective cohort study

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Abstract

Objective

The purpose of this study was to investigate the prevalence and relevant factors of taurodontism in North China.

Methods

We retrospectively analysed the cone beam computed tomography (CBCT) of 1025 patients (496 male and 529 female) aged between 10 and 59 years. The crown-body/root (CB/R) ratios of the maxillary and mandibular molars were measured. The prevalence of hypotaurodontism, mesotaurodontism, and hypertaurodontism was then calculated and the incidence of taurodontism along with its relevant factors, was evaluated.

Results

The overall rate of taurodontism in North China was as high as 78.9%. If the third molars (opsigenes) were excluded, which have a big morphological variation from each other, the rate was 52.4%. The mean CB/R ratio of taurodontism differs from tooth position: maxillary mandibular third molars > maxillary third molars > maxillary second molars > maxillary first molars > mandibular second molars > mandibular first molars (P < 0.05). In addition, the 1025 patients were divided into different age groups, and it was found that the mean CB/R ratio decreased with age (P < 0.05). Moreover, the CB/R ratio of the mandibular first and second molars in female patients was higher than males (P < 0.05).

Conclusion

This study revealed that taurodontism is widely prevalent in North China. The incidence of taurodontism increases the closer the tooth is to the back end of the dental arch, and quite a few of the maxillary and mandibular third molars teeth have tapered roots. And the taurodontism is decreased by age, as there were more affected female than male patients.

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Funding

Xingtai Science and Technology Project, 2019ZC230, Yunmeng Da

Author information

Authors and Affiliations

  1. Hebei Provincial Key Laboratory of Ophthalmology, Hebei Clinical Medical Research Center of Eye Diseases, Department of Prosthodontics, Hebei Eye Hosipital, Quanbei East Street, No.:399, Xiangdu, Xingtai, China

    Yunmeng Da & Zhiyin Zhang

  2. Hebei Provincial Key Laboratory of Ophthalmology, Hebei Clinical Medical Research Center of Eye Diseases, Department of Implantation, Hebei Eye Hosipital, Quanbei East Street, No.:399, Xiangdu, Xingtai, China

    Chao Wang

  3. Hebei Provincial Key Laboratory of Ophthalmology, Hebei Clinical Medical Research Center of Eye Diseases, Department of Oral and Maxillofacial Surgery, Hebei Eye Hosipital, Quanbei East Street,No.:399, Xiangdu, Xingtai, China

    Le Zhang, Haoxuan Sun, Xuliang Ma & Dongzhen li

  4. Hebei Clinical Medical Research Center of Eye Diseases, Hebei Provincial Key Laboratory of Ophthalmology, Department of Medical Imaging, Hebei Eye Hosipital, Quanbei East Street, No.:399, Xiangdu, Xingtai, China

    Fuyin Wang

  5. Hebei Provincial Key Laboratory of Ophthalmology, Hebei Clinical Medical Research Center of Eye Diseases, Department of Dental Internal Medicine, Hebei Eye Hosipital, Quanbei East Street, No.:399, Xiangdu, Xingtai, China

    Xiaolan Ma

  6. Hebei Provincial Key Laboratory of Ophthalmology, Hebei Clinical Medical Research Center of Eye Diseases, Department of Imformation, Hebei Eye Hosipital, Quanbei East Street, No.:399, Xiangdu, Xingtai, China

    Rui Li

  7. Department of Stomatology, Third Medical Center of Chinese PLA General Hospital, Yongding road No:69, Haidian, Beijing, China

    Jing Jia

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  1. Yunmeng Da
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Correspondence to Yunmeng Da.

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Ethical approval

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008 (5). Informed consent was obtained from all patients for being included in the study.

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Da, Y., Wang, C., Zhang, L. et al. High prevalence of taurodontism in North China and its relevant factors: a retrospective cohort study. Oral Radiol 39, 266–274 (2023). https://doi.org/10.1007/s11282-022-00630-1

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