Oral Biology Research

Table. 5.

Number of the reasons for tooth extraction according to tooth type

Tooth Reason

Caries Perio Impacted Prosth Ortho Fracture Trauma Others
UM3 8,580 (38.5) 2,988 (13.4) 9,846 (44.2) 394 (1.8) 355 (1.6) 39 (0.2) 8 (0.0) 80 (0.4)
UM2 557 (14.7) 2,328 (61.5) 113 (3.0) 534 (14.1) 18 (0.5) 153 (4.0) 7 (0.2) 76 (2.0)
UM1 503 (14.3) 2,005 (57.0) 63 (1.8) 603 (17.2) 15 (0.4) 202 (5.7) 3 (0.1) 122 (3.5)
UPM2 229 (12.3) 847 (45.5) 39 (2.1) 511 (27.5) 10 (0.5) 133 (7.2) 4 (0.2) 87 (4.7)
UPM1 207 (11.7) 872 (49.1) 16 (0.9) 473 (26.6) 13 (0.7) 109 (6.1) 7 (0.4) 78 (4.4)
UC 171 (11.2) 649 (42.4) 12 (0.8) 609 (39.8) 2 (0.1) 15 (1.0) 1 (0.1) 72 (4.7)
ULI 147 (12.2) 572 (47.4) 10 (0.8) 367 (30.4) 2 (0.2) 47 (3.9) 11 (0.9) 52 (4.3)
UCI 154 (9.2) 825 (49.3) 24 (1.4) 414 (24.7) 12 (0.7) 134 (8.0) 31 (1.9) 79 (4.7)
LCI 81 (6.6) 893 (72.6) 5 (0.4) 182 (14.8) 4 (0.3) 25 (2.0) 19 (1.5) 21 (1.7)
LLI 61 (7.6) 518 (64.8) 1 (0.1) 170 (21.3) 1 (0.1) 10 (1.3) 4 (0.5) 35 (4.4)
LC 111 (10.1) 552 (50.1) 1 (0.1) 352 (31.9) 2 (0.2) 16 (1.5) 13 (1.2) 55 (5.0)
LPM1 130 (11.7) 528 (47.5) 10 (0.9) 346 (31.1) 5 (0.5) 23 (2.1) 5 (0.5) 64 (5.8)
LPM2 158 (11.7) 581 (42.9) 32 (2.4) 436 (32.2) 5 (0.4) 58 (4.3) 3 (0.2) 82 (6.1)
LM1 573 (17.2) 1,475 (44.30) 93 (2.8) 749 (22.5) 24 (0.7) 185 (5.6) 8 (0.2) 223 (6.7)
LM2 682 (16.0) 2,311 (54.1) 297 (7.0) 556 (13.0) 8 (0.2) 222 (5.2) 6 (0.1) 191 (4.5)
LM3 3,700 (38.8) 2,276 (23.9) 2,930 (30.7) 379 (4.0) 130 (1.4) 23 (0.2) 6 (0.1) 92 (1.0)
Total 16,044 (26.6) 20,220 (33.5) 13,492 (22.3) 7,075 (11.7) 606 (1.0) 1,394 (2.3) 136 (0.2) 1,409 (2.3)
p-value <0.001*

Values are presented as number (%).

UM3, upper third molar; UM2, upper second molar; UM1, upper first molar; UPM2, upper second premolar; UPM1, upper first premolar; UC, upper canine; ULI, upper lateral incisor; UCI, upper central incisor; LCI, lower central incisor; LLI, lower lateral incisor; LC, lower canine; LPM1, lower first premolar; LPM2, lower second premolar; LM1, lower first molar; LM2, lower second molar; LM3, lower third molar.

*Chi-square is used to evaluate the statistical significance between the reason and tooth type.

Oral Biol Res 2021;45:1~6 https://doi.org/10.21851/obr.45.01.202103.1
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