Table 6.
Descriptive statistics and 95% CIs for dental sizes (averages of the right and left sides, mm) in cases with and without microdontia. The groups are compared using the t-test.
| Jaw | Measurement | Tooth | Microdontia | N | Mean | SD | 95% CI | Min | Max | P | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Maxilla | Buccolingual | 1 | No | 203 | 7.489 | 0.550 | 7.41 | 7.56 | 5.91 | 9.04 | <0.0005 |
| Yes | 128 | 7.250 | 0.584 | 7.15 | 7.35 | 5.88 | 8.52 | ||||
| Total | 331 | 7.396 | 0.575 | 7.33 | 7.46 | 5.88 | 9.04 | ||||
| 2 | No | 199 | 6.681 | 0.650 | 6.59 | 6.77 | 4.51 | 10.13 | 0.002 | ||
| Yes | 126 | 6.454 | 0.639 | 6.34 | 6.57 | 4.47 | 8.19 | ||||
| Total | 325 | 6.593 | 0.654 | 6.52 | 6.66 | 4.47 | 10.13 | ||||
| 3 | No | 200 | 8.370 | 0.659 | 8.28 | 8.46 | 6.18 | 9.87 | <0.0005 | ||
| Yes | 126 | 8.054 | 0.628 | 7.94 | 8.16 | 6.24 | 9.54 | ||||
| Total | 326 | 8.248 | 0.664 | 8.18 | 8.32 | 6.18 | 9.87 | ||||
| 4 | No | 196 | 9.483 | 0.525 | 9.41 | 9.56 | 8.01 | 10.74 | <0.0005 | ||
| Yes | 127 | 9.129 | 0.668 | 9.01 | 9.25 | 6.41 | 10.68 | ||||
| Total | 323 | 9.344 | 0.610 | 9.28 | 9.41 | 6.41 | 10.74 | ||||
| 5 | No | 202 | 9.663 | 0.508 | 9.59 | 9.73 | 8.36 | 10.99 | <0.0005 | ||
| Yes | 127 | 9.156 | 0.689 | 9.04 | 9.28 | 6.01 | 10.78 | ||||
| Total | 329 | 9.468 | 0.633 | 9.40 | 9.54 | 6.01 | 10.99 | ||||
| 6 | No | 202 | 11.584 | 0.558 | 11.51 | 11.66 | 10.11 | 13.17 | <0.0005 | ||
| Yes | 128 | 11.117 | 0.595 | 11.01 | 11.22 | 9.73 | 12.47 | ||||
| Total | 330 | 11.403 | 0.616 | 11.34 | 11.47 | 9.73 | 13.17 | ||||
| 7 | No | 197 | 11.609 | 0.678 | 11.51 | 11.70 | 9.54 | 13.32 | <0.0005 | ||
| Yes | 127 | 10.969 | 0.743 | 10.84 | 11.10 | 8.98 | 12.89 | ||||
| Total | 324 | 11.358 | 0.770 | 11.27 | 11.44 | 8.98 | 13.32 | ||||
| Mesiodistal | 1 | No | 203 | 8.834 | 0.514 | 8.76 | 8.91 | 7.63 | 10.47 | <0.0005 | |
| Yes | 128 | 8.440 | 0.567 | 8.34 | 8.54 | 6.64 | 10.33 | ||||
| Total | 331 | 8.682 | 0.568 | 8.62 | 8.74 | 6.64 | 10.47 | ||||
| 2 | No | 199 | 6.977 | 0.513 | 6.91 | 7.05 | 4.74 | 8.10 | <0.0005 | ||
| Yes | 126 | 6.451 | 0.685 | 6.33 | 6.57 | 3.90 | 7.70 | ||||
| Total | 325 | 6.773 | 0.639 | 6.70 | 6.84 | 3.90 | 8.10 | ||||
| 3 | No | 201 | 7.826 | 0.444 | 7.76 | 7.89 | 6.84 | 9.14 | <0.0005 | ||
| Yes | 127 | 7.467 | 0.416 | 7.39 | 7.54 | 5.57 | 8.47 | ||||
| Total | 328 | 7.687 | 0.467 | 7.64 | 7.74 | 5.57 | 9.14 | ||||
| 4 | No | 196 | 7.107 | 0.430 | 7.05 | 7.17 | 5.58 | 8.29 | <0.0005 | ||
| Yes | 127 | 6.770 | 0.492 | 6.68 | 6.86 | 4.94 | 9.03 | ||||
| Total | 323 | 6.974 | 0.484 | 6.92 | 7.03 | 4.94 | 9.03 | ||||
| 5 | No | 202 | 6.817 | 0.469 | 6.75 | 6.88 | 5.70 | 8.57 | <0.0005 | ||
| Yes | 127 | 6.455 | 0.490 | 6.37 | 6.54 | 4.97 | 8.96 | ||||
| Total | 329 | 6.677 | 0.508 | 6.62 | 6.73 | 4.97 | 8.96 | ||||
| 6 | No | 202 | 10.318 | 0.588 | 10.24 | 10.40 | 8.74 | 11.89 | <0.0005 | ||
| Yes | 128 | 9.773 | 0.549 | 9.68 | 9.87 | 8.46 | 11.12 | ||||
| Total | 330 | 10.106 | 0.631 | 10.04 | 10.17 | 8.46 | 11.89 | ||||
| 7 | No | 197 | 10.100 | 0.568 | 10.02 | 10.18 | 8.59 | 11.62 | <0.0005 | ||
| Yes | 127 | 9.524 | 0.517 | 9.43 | 9.61 | 8.23 | 11.05 | ||||
| Total | 324 | 9.874 | 0.616 | 9.81 | 9.94 | 8.23 | 11.62 | ||||
|
| |||||||||||
| Mandible | Buccolingual | 1 | No | 201 | 6.329 | 0.470 | 6.26 | 6.39 | 4.78 | 7.82 | 0.001 |
| Yes | 128 | 6.157 | 0.481 | 6.07 | 6.24 | 4.83 | 7.37 | ||||
| Total | 329 | 6.262 | 0.481 | 6.21 | 6.31 | 4.78 | 7.82 | ||||
| 2 | No | 203 | 6.598 | 0.472 | 6.53 | 6.66 | 5.21 | 7.97 | 0.001 | ||
| Yes | 128 | 6.414 | 0.513 | 6.32 | 6.50 | 5.17 | 7.53 | ||||
| Total | 331 | 6.527 | 0.496 | 6.47 | 6.58 | 5.17 | 7.97 | ||||
| 3 | No | 203 | 7.595 | 0.650 | 7.51 | 7.69 | 5.89 | 9.43 | <0.0005 | ||
| Yes | 128 | 7.329 | 0.543 | 7.23 | 7.42 | 5.91 | 8.71 | ||||
| Total | 331 | 7.492 | 0.624 | 7.42 | 7.56 | 5.89 | 9.43 | ||||
| 4 | No | 200 | 8.169 | 0.535 | 8.09 | 8.24 | 6.97 | 9.59 | <0.0005 | ||
| Yes | 127 | 7.818 | 0.592 | 7.71 | 7.92 | 6.11 | 9.71 | ||||
| Total | 327 | 8.033 | 0.583 | 7.97 | 8.10 | 6.11 | 9.71 | ||||
| 5 | No | 198 | 8.891 | 0.510 | 8.82 | 8.96 | 7.33 | 9.95 | <0.0005 | ||
| Yes | 128 | 8.479 | 0.581 | 8.38 | 8.58 | 6.56 | 10.18 | ||||
| Total | 326 | 8.729 | 0.575 | 8.67 | 8.79 | 6.56 | 10.18 | ||||
| 6 | No | 202 | 10.914 | 0.501 | 10.84 | 10.98 | 9.82 | 12.62 | <0.0005 | ||
| Yes | 128 | 10.477 | 0.515 | 10.39 | 10.57 | 8.82 | 11.60 | ||||
| Total | 330 | 10.745 | 0.548 | 10.69 | 10.80 | 8.82 | 12.62 | ||||
| 7 | No | 199 | 10.732 | 0.541 | 10.66 | 10.81 | 9.31 | 12.04 | <0.0005 | ||
| Yes | 128 | 10.292 | 0.621 | 10.18 | 10.40 | 8.56 | 11.88 | ||||
| Total | 327 | 10.560 | 0.612 | 10.49 | 10.63 | 8.56 | 12.04 | ||||
| Mesiodistal | 1 | No | 203 | 5.495 | 0.377 | 5.44 | 5.55 | 4.51 | 6.45 | <0.0005 | |
| Yes | 128 | 5.257 | 0.397 | 5.19 | 5.33 | 4.12 | 6.41 | ||||
| Total | 331 | 5.403 | 0.402 | 5.36 | 5.45 | 4.12 | 6.45 | ||||
| 2 | No | 203 | 6.054 | 0.387 | 6.00 | 6.11 | 5.18 | 7.11 | <0.0005 | ||
| Yes | 128 | 5.803 | 0.421 | 5.73 | 5.88 | 4.50 | 7.22 | ||||
| Total | 331 | 5.957 | 0.418 | 5.91 | 6.00 | 4.50 | 7.22 | ||||
| 3 | No | 203 | 6.811 | 0.424 | 6.75 | 6.87 | 5.74 | 7.98 | <0.0005 | ||
| Yes | 128 | 6.502 | 0.418 | 6.43 | 6.58 | 5.39 | 8.00 | ||||
| Total | 331 | 6.691 | 0.447 | 6.64 | 6.74 | 5.39 | 8.00 | ||||
| 4 | No | 200 | 7.207 | 0.430 | 7.15 | 7.27 | 6.06 | 8.30 | <0.0005 | ||
| Yes | 127 | 6.831 | 0.462 | 6.75 | 6.91 | 5.44 | 7.80 | ||||
| Total | 327 | 7.061 | 0.479 | 7.01 | 7.11 | 5.44 | 8.30 | ||||
| 5 | No | 199 | 7.286 | 0.500 | 7.22 | 7.36 | 6.19 | 8.79 | <0.0005 | ||
| Yes | 128 | 6.864 | 0.445 | 6.79 | 6.94 | 5.86 | 8.13 | ||||
| Total | 327 | 7.121 | 0.521 | 7.06 | 7.18 | 5.86 | 8.79 | ||||
| 6 | No | 202 | 11.066 | 0.606 | 10.98 | 11.15 | 9.41 | 12.99 | <0.0005 | ||
| Yes | 128 | 10.467 | 0.652 | 10.35 | 10.58 | 8.17 | 12.15 | ||||
| Total | 330 | 10.833 | 0.689 | 10.76 | 10.91 | 8.17 | 12.99 | ||||
| 7 | No | 199 | 10.508 | 0.567 | 10.43 | 10.59 | 9.18 | 12.31 | <0.0005 | ||
| Yes | 128 | 9.968 | 0.597 | 9.86 | 10.07 | 8.52 | 11.84 | ||||
| Total | 327 | 10.297 | 0.635 | 10.23 | 10.37 | 8.52 | 12.31 | ||||
Tooth numbers 1 to 7 denote the central to the second molar teeth. SD: standard deviation; CI: confidence interval; Min: minimum; Max: maximum.