Table 1 Detected rate of rDSC in mandibular second molars adjacent to impacted third molars and its relation to clinical, demographic, socioeconomic and oral health characteristics
Characteristic | Total | Presence of rDSC | p-value | |
|---|---|---|---|---|
n = 1012 (%) | Yes (%) | No (%) | ||
Side of mandible | 0.883 | |||
Right | 480 (47.4) | 308 (64.2) | 172 (35.8) | |
Left | 532 (52.6) | 339 (63.7) | 193 (36.3) | |
Gender | 0.001* | |||
Female | 434 (42.9) | 253 (58.3) | 181 (41.7) | |
Male | 578 (57.1) | 394 (68.2) | 184 (31.8) | |
Mean age (years) ± SD | 36.6 ± 11.1 | 38.1 ± 11.9 | 33.9 ± 8.9 | < 0.001* |
Age (years) | < 0.001* | |||
25–30 | 402 (39.4) | 236 (58.7) | 166 (41.3) | |
31–35 | 205 (20.3) | 105 (51.2) | 100 (48.8) | |
36–40 | 115 (11.4) | 80 (69.6) | 35 (30.4) | |
41–50 | 166 (16.4) | 126 (75.9) | 40 (24.1) | |
51–60 | 83 (8.2) | 64 (77.1) | 19 (22.9) | |
≥ 61 | 41 (4.1) | 36 (87.8) | 5 (12.2) | |
Orientation of third molar impaction | < 0.001* | |||
Mesial | 599 (59.2) | 469 (78.3) | 130 (21.7) | |
Horizontal | 203 (20.1) | 113 (55.7) | 90 (44.3) | |
Vertical | 98 (9.7) | 38 (38.8) | 60 (61.2) | |
Distal | 109 (10.8) | 25 (22.9) | 84 (77.1) | |
Transverse | 3 (0.3) | 2 (66.7) | 1 (33.3) | |
Contact point localisation: MB cusp position | < 0.001* | |||
Above | 26 (2.6) | 9 (24.6) | 17 (65.4) | |
At | 110 (10.9) | 30 (27.3) | 80 (72.7) | |
Below | 846 (83.6) | 599 (70.8) | 247 (29.2) | |
No contact | 30 (3.0) | 9 (30) | 21 (70) | |
Loss of lamina dura | < 0.001* | |||
< 2 mm | 138 (13.6) | 23 (16.7) | 115 (83.3) | |
≥ 2 mm | 874 (86.4) | 624 (71.4) | 250 (28.6) | |
Mean quintile group IMD score ± SD | 3.6 ± 1.4 | 3.7 ± 1.4 | 3.5 ± 1.4 | 0.280 |
Quintile group IMD score | 0.425 | |||
1 (least deprived) | 114 (11.3) | 68 (59.6) | 46 (40.4) | |
2 | 129 (12.7) | 81 (62.8) | 48 (37.2) | |
3 | 166 (16.4) | 98 (59.0) | 68 (41.0) | |
4 | 214 (21.1) | 142 (66.4) | 72 (33.6) | |
5 (most deprived) | 365 (36.1) | 244 (66.8) | 121 (33.2) | |
Missing | 24 (2.4) | 14 (58.3) | 10 (41.7) | |
Mean mDMFT-R (%) ± SD | 47.5 ± 28.2 | 51.8 ± 27.7 | 39.9 ± 27.6 | < 0.001* |
mDMFT-R (%) | < 0.001* | |||
0 | 73 (7.2) | 22 (30.1) | 51 (69.9) | |
1–15 | 80 (7.9) | 40 (50.0) | 40 (50.0) | |
16–30 | 174 (17.2) | 111 (63.8) | 63 (36.2) | |
31–45 | 179 (17.7) | 118 (65.9) | 61 (43.1) | |
46–60 | 167 (16.6) | 115 (68.9) | 52 (31.1) | |
61–75 | 173 (17.1) | 107 (61.8) | 66 (38.2) | |
≥ 76 | 166 (16.4) | 134 (80.7) | 32 (19.3) | |