Table 5 Distributions of Type 1 and Type 2 in skeletal Class I, II and III malocclusions
Root type | Score | Sagittal view | P-value | Coronal view | P-value | ||||
|---|---|---|---|---|---|---|---|---|---|
Class I | Class II | Class III | Class I | Class II | Class III | ||||
U4 | Type 1 | 182(34.4) | 178(33.6) | 169(31.9) | 0.635 | 173(33.7) | 173(33.7) | 167(32.6) | 0.113 |
Type 2C | 17(34.0) | 18(36.0) | 15(30.0) | 20(32.3) | 26(41.9) | 16(25.8) | |||
Type 2LC | 1(11.1) | 5(55.6) | 3(33.3) | 1(16.7) | 2(33.3) | 3(50.0) | |||
Type 2P | 4(50.0) | 3(37.5) | 1(12.5) | 10(66.7) | 3(20.0) | 2(13.3) | |||
U5 | Type 1 | 120(35.1) | 109(31.9) | 113(33.0) | 0.375 | 121(35.6) | 107(31.5) | 112(32.9) | 0.006 |
Type 2C | 30(28.6) | 40(38.1) | 35(33.3) | 38(27.3) | 56(40.3) | 45(32.4) | |||
Type 2LC | 11(26.8) | 16(39.0) | 14(34.1) | 2(12.5) | 4(25.0) | 10(62.5) | |||
Type 2P | 43(39.8) | 39(36.1) | 26(24.1) | 43(42.6) | 37(36.6) | 21(20.8) | |||
U6MB | Type 1 | 107(37.8) | 91(32.2) | 85(30.0) | 0.007 | 107(37.2) | 86(29.9) | 95(33.0) | <0.001 |
Type 2C | 30(24.0) | 39(31.2) | 56(44.8) | 31(31.0) | 38(38.0) | 31(31.0) | |||
Type 2LC | 2(28.6) | 4(57.1) | 1(14.3) | 6(9.4) | 32(50.0) | 26(40.6) | |||
Type 2P | 65(35.9) | 70(38.7) | 46(25.4) | 60(41.7) | 48(33.3) | 36(25.0) | |||
U6DB | Type 1 | 102(35.1) | 90(30.9) | 99(34.0) | 0.214 | 111(37.2) | 94(31.5) | 93(31.2) | 0.004 |
Type 2C | 42(29.8) | 58(41.1) | 41(29.1) | 30(25.6) | 56(47.9) | 31(26.5) | |||
Type 2LC | 0(0.0) | 3(60.0) | 2(40.0) | 12(22.2) | 18(33.3) | 24(44.4) | |||
Type 2P | 60(37.7) | 53(33.3) | 46(28.9) | 51(40.2) | 36(28.3) | 40(31.5) | |||
U6P | Type 1 | 93(32.7) | 89(31.3) | 102(35.9) | 0.004 | 103(34.6) | 92(30.9) | 103(34.6) | 0.01 |
Type 2C | 24(28.9) | 27(32.5) | 32(38.6) | 19(34.5) | 22(40.0) | 14(25.5) | |||
Type 2LC | 1(6.3) | 9(56.3) | 6(37.5) | 11(16.4) | 29(43.3) | 27(40.3) | |||
Type 2P | 86(40.4) | 79(37.1) | 48(22.5) | 71(40.3) | 61(34.7) | 44(25.0) | |||
U7MB | Type 1 | 78(32.9) | 78(32.9) | 81(34.2) | 0.001 | 79(34.2) | 80(34.6) | 72(31.2) | 0.001 |
Type 2C | 21(24.7) | 30(35.3) | 34(40.0) | 34(25.8) | 50(37.9) | 48(36.4) | |||
Type 2LC | 3(11.5) | 17(65.4) | 6(23.1) | 1(4.0) | 10(40.0) | 14(56.0) | |||
Type 2P | 102(41.1) | 79(31.9) | 67(27.0) | 90(43.3) | 64(30.8) | 54(26.0) | |||
U7DB | Type 1 | 88(32.0) | 95(34.5) | 92(33.5) | 0.007 | 100(34.7) | 93(32.3) | 95(33.0) | 0.007 |
Type 2C | 17(21.8) | 28(35.9) | 33(42.3) | 33(25.6) | 56(43.4) | 40(31.0) | |||
Type 2LC | 0(0.0) | 0(0.0) | 2(100.0) | 3(13.0) | 9(39.1) | 11(47.8) | |||
Type 2P | 99(41.1) | 81(33.6) | 61(25.3) | 68(43.6) | 46(29.5) | 42(26.9) | |||
U7P | Type 1 | 110(32.2) | 115(33.6) | 117(34.2) | 0.004 | 129(34.6) | 125(33.5) | 119(31.9) | 0.82 |
Type 2C | 23(30.7) | 28(37.3) | 24(32.0) | 29(28.4) | 39(38.2) | 34(33.3) | |||
Type 2LC | 3(11.1) | 10(37.0) | 14(51.9) | 10(34.5) | 11(37.9) | 8(27.6) | |||
Type 2P | 68(44.7) | 51(33.6) | 33(21.7) | 36(39.1) | 29(31.5) | 27(29.3) | |||