Effects of Impacted Third Molars Extraction on Periodontal Status of Second Molar and Oral Health-Related Quality of Life
Table 1.
Features of the study
population, n (%)
| Features | Treatment group(N=136) | Control group(N=136) | | Gender | | | | Male | 133(97.79) | 133(97.79) | | Female | 3(2.21) | 3(2.21) | | Age (yr) | | | | ≦20 | 36(26.47) | 38(27.94) | | 21-30 | 71(52.21) | 69(50.74) | | 31-40 | 25 (18.38) | 23(16.91) | | 41 | 4 (2.94) | 6(4.41) | | Race | | | | Han nationality | 136(100) | 136(100) | | Educational level | | | | Primary school | 16(11.76) | 16(11.76) | | High school | 41(30.15) | 39(28.68) | | Bachelor degree or higher level | 79(58.09) | 81(59.56) | | Oral hygiene | | | | Good | 31 (22.79) | 29(21.32) | | Bad | 105 (77.21) | 107(78.68) | | Smoking | | | | Yes | 76 (55.88) | 77(56.62) | | No | 60 (44.12) | 59(43.38) | | Regular dental check | | | | Yes | 20 (14.71) | 19(13.97) | | No | 116 (85.29) | 117(86.03) | | History of toothache due to M3 | | | | Yes | 86(63.24) | 83(61.03) | | No | 50(36.76) | 53(38.97) | | Seeking M3 surgery due to toothache | | | | Yes | 117 (86.03) | 115(84.56) | | No | 19 (13.97) | 21(15.44) | | Impact M3 type | | | | Soft tissue | 111(81.62) | 107(78.68) | | Hard tissue | 25(18.38) | 29(21.32) | | Obvious infection after M3 removal | | | | Soft tissue | 6(5.41) | (-) | | Hard tissue | 4(16.00) | (-) |
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