Table 5 Prevalence of C-shape morphology and root canal configuration in mandibular second molars: a panoramic reconstruction study
Type 1 | Type 2 | Type 3 | Type 4 | Type 5 | χ2 | p value | ||
|---|---|---|---|---|---|---|---|---|
#37 | 114.78 | 0.001* | ||||||
Absent | 39(57.4) | 21(11.8) | 4(4) | 12(16.4) | 0 | |||
Present | 29(42.6) | 157(88.2) | 96(96) | 61(83.6) | 58(100) | |||
#47 | 118.19 | 0.001* | ||||||
Absent | 33(55.9) | 18(8.5) | 4(3.5) | 8(14.3) | 0 | |||
Present | 26(44.1) | 195(91.5) | 109(96.5) | 48(85.7) | 51(100) | |||
37Root | 209.46 | 0.001* | ||||||
1 | 7(10.3) | 17(9.6) | 8(8) | 0(0) | 37(54.4) | |||
2 | 21(30.9) | 71(40.1) | 25(25) | 2(2.7) | 31(45.6) | |||
3 | 40(58.8) | 86(48.6) | 65(65) | 61(836.) | 0(0) | |||
4 | 0(0) | 3(1.7) | 2(2) | 10 (13.7) | 0(0) | |||
47Root | 152.68 | 0.001* | ||||||
1 | 1(1.7) | 12(5.6) | 5(4.4) | 1(1.8) | 22(39.3) | |||
2 | 33(55.9) | 93(43.7) | 31(27.4) | 3(5.4) | 31(60.7) | |||
3 | 25(42.4) | 103(48.4) | 73(64.6) | 46(82.1) | 0(0) | |||
4 | 0(0) | 5(2.3) | 4(3.5) | 6(10.7) | 0(0) | |||
Total | 127 | 391 | 213 | 129 | 109 |