Table 3.
Relationship between bone density and oral function
| All (754) | Osteoporosis (n = 260) | Decreased bone mass (n = 287) | Normal (n = 207) | Two-group comparison |
|---|---|---|---|---|
| Remaining teeth (num) | 22 (14, 26) | 24 (14, 27) | 23 (16, 26) | N.S. |
| Occlusal force (kgf)* | 40 (21.9, 73.4) | 53.1 (25, 85.4) | 60.3 (33.8, 91.6) | a,b |
| Occlusal balance (%) | 21.8 (9.3, 40.3) | 17.4 (7.9, 36.6) | 20.1 (8.1, 35.8) | N.S. |
| Masticatory performance (score) * | 4 (1, 6) | 5 (2, 6) | 5 (3, 6) | b |
| Tongue pressure (kPa) * | 32.8 (26.6, 37.8) | 34.3 (28.8, 39.1) | 34.6 (30, 39.5) | b |
| Occlusal support | ||||
| Group A | 97 (30.2) | 136(42.4) | 88(27.4) | N.S. |
| Group B | 107(35.8) | 104(34.8) | 88(29.4) | |
| Group C | 56(41.8) | 47(35.1) | 31(23.1) | |
| Male (276) | Osteoporosis (n = 65) | Decreased bone mass (n = 95) | Normal (n = 116) | Two-group comparison |
| Remaining teeth (num) | 23 (11, 27) | 23 (12, 27) | 23 (16.3, 27) | N.S. |
| Occlusal force (kgf) * | 42.5 (22.4, 87.9) | 53.1 (26.4, 94.3) | 66.1 (41.8, 103.6) | a,b |
| Occlusal balance (%) | 21 (8.8, 39) | 19.6 (9.4, 39.7) | 21.7 (7, 37.1) | N.S. |
| Masticatory performance (score) * | 4 (2, 6) | 5 (1, 6) | 5 (4, 6) | a |
| Tongue pressure (kPa) | 33.1 (27.1, 38.6) | 33.8 (28.8, 39.9) | 34.5 (30.7, 40) | N.S. |
| Occlusal support | ||||
| Group A | 25(21.9) | 38(33.3) | 51(44.7) | N.S. |
| Group B | 20(19.2) | 38(36.5) | 46(44.2) | |
| Group C | 20(34.5) | 19(32.8) | 19(32.8) | |
| Female (478) | Osteoporosis (n = 195) | Decreased bone mass (n = 192) | Normal (n = 91) | Two-group comparison |
| Remaining teeth (num) | 22 (15, 26) | 24 (17, 27) | 23 (16, 26) | N.S. |
| Occlusal force (kgf) | 39.8 (21.8, 72.2) | 53.5 (24.9, 84.6) | 48 (26.6, 78) | N.S. |
| Occlusal balance (%) | 21.9 (9.9, 40.5) | 17.1 (7.5, 36.2) | 17.1 (8.7, 34.3) | N.S. |
| Masticatory performance (score) | 4 (1, 5) | 5 (2, 6) | 5 (2, 6) | N.S. |
| Tongue pressure (kPa) * | 32.6 (26.3, 37.5) | 34.4 (28.9, 38.9) | 35.3 (30, 39) | b |
| Occlusal support** | ||||
| Group A | 72(34.9) | 98(47.3) | 37(17.9) | c |
| Group B | 87(44.6) | 66(33.8) | 42(21.5) | |
| Group C | 36(47.4) | 28(36.8) | 12(16.8) | |
median (first quartile, third quartile) or number of people (%)
*: Significant difference in Kruskal-Wallis Test. **: Significant difference by χ2-test
Two-group comparison: The Mann-Whitney U test was used to compare two groups, and the P value was corrected by the Bonferroni method. a: Statistically significant difference between normal group and decreased bone mass group. b: Statistically significant difference between normal group and osteoporosis group. c: Statistically significant difference between the osteoporosis group and the decreased bone mass group. N.S.: No significant difference in all comparisons