Table 3. Assessment of periodontal health using the modified plaque index (Löe 1967), gingival index (Löe et al. 1972) and occlusion across time.
| HT | CT | Pearson Chi-squared test | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Months | 0 N = 109 |
6 N = 105 |
12 N = 104 |
18 N = 95 |
24 N = 84 |
0 N = 103 |
6 N = 99 |
12 N = 95 |
18 N = 90 |
24 N = 81 |
χ2 Value (df) |
p value | |
| Plaque Index | 0 | 48 (44.0%) | 66 (62.9%) | 69 (66.3%) | 71 (74.7%) | 69 (82.1%) | 55 (53.4%) | 61 (61.6%) | 66(69.5%) | 64(71.1%) | 61 (75.3%) | 1.12 (3) | NS |
| 1 | 38 (34.9%) | 33 (31.4%) | 30 (28.8%) | 21 (22.1%) | 12 (14.3%) | 32 (31.1%) | 33 (33.3%) | 25(26.3%) | 23(25.6%) | 17 (21.0%) | |||
| 2 | 23 (21.1%) | 6 (5.7%) | 5 (4.8%) | 3 (3.2%) | 3 (3.6%) | 16 (15.5%) | 5 (5.1%) | 4(4.2%) | 3(3.3%) | 3 (3.7%) | |||
| Gingival index | 0 | 62 (56.9%) | 73 (69.5%) | 74 (71.2%) | 80 (84.2%) | 78 (92.9%) | 53 (51.4%) | 68 (68.7%) | 70(73.7%) | 71(78.9%) | 70 (86.4%) | 3.67(3) | NS |
| 1 | 41 (37.6%) | 26 (24.8%) | 26 (25.0%) | 12 (12.6%) | 4 (4.8%) | 39 (37.9%) | 25 (25.3%) | 20 (21.1%) | 15 (16.7%) | 8 (9.9%) | |||
| 2 | 6 (5.5%) | 6 (5.7%) | 4 (3.8%) | 3 (3.2%) | 2 (2.4%) | 11 (10.7%) | 6 (6.1%) | 5 (5.3%) | 4 (4.4%) | 3 (3.7%) | |||
| Occlusion | Normal | 0 | 102 (97.1%) | 104 (100%) | 95 (100%) | 84(100%) | 99 (96.1%) | 99 (100%) | 95 (100%) | 90 (100%) | 81 (100%) | 188.77(2) | <0.001 |
| Raised | 109 (100%) | 3 (2.9%) | 0 | 0 | 0 | 4 (3.9%) | 0 | 0 | 0 | 0 | |||
HT, Hall technique; CT, conventional technique; df, degrees of freedom, p>0.05 considered significant; NS, not significant.