Table 7 Prevalence of root and canal configurations in mandibular second molars in previous studies by CBCT
References | Region/race | Sample size | Prevalence of two-rooted teeth (%) | Prevalence of three canals in two-rooted teeth (%) | Prevalence of C-shaped root canal (%) |
|---|---|---|---|---|---|
This study | Chinese | 1200 | 61 | 45.3 | 35.8 |
Ajinkya et al. [4] | Indian | 983 | 79.35 | 53.5 | 13.12 |
Nur et al. [6] | South-eastern Turkish | 1165 | 90 | – | – |
Zhang et al. [7] | Chinese | 389 | 76 | 46 | 29 |
Kim et al. [8] | Korean | 1920 | 58 | 81.6 | 40 |
Razumova et al. [9] | Moscow | 398 | 99.5 | 82.2 | - |
Martins et al. [27] | Asian | 240 | 53.8 | – | – |
White | 687 | 83.1 | – | – | |
Silva et al. [28] | Brazilian | 226 | 86 | 54 | 3.5 |
Demirbuga et al. [29] | Turkish | 925 | 85.4 | 72.8 | 4.1 |