Table 13.
Dental effects: overjet and overbite
| Reference | N | F/U (months) | Overjet | Overbite | Comments | ||
|---|---|---|---|---|---|---|---|
| Base | F/U | Base | F/U | ||||
| [39] | 19 | 13 | 4.0 | −3.0 | 2.9 | 6.3 | Herbst appliance |
| [108] | 32 | 24 | 4.5 | 4.1 | 3.6 | 3.5 | |
| [71] | 22 | 6 | 5.97 | 1.08 | 3.97 | −8.01 | After correction for magnification error |
| [109] | 87 | 30 | 4.25 | 3.19 | 4.09 | 3.07 | Effects evident already at 6 months |
| [73] | 22 | 14 | 3.3 | 3.1 | 4.0 | 3.6 | Median results at follow-up |
| [110] | 47 | 28 | 3.9 | 3.6 | 3.2 | 2.8 | Significantly larger changes compared to reference group |
| [110] | 28 | 31 | 4.5 | 3.9 | 3.8 | 3.3 | Ibid |
| [81] | 34 | 30 | 4.4 | 3.1 | 3.6 | 2.5 | |
| [111] | 30 | 48 | 3.5 | 3.1 | 4.3 | 3.8 | NS; compared to UPPP |
| [112] | 20 | 30 | 3.84 | 2.63 | 4.43 | 2.61 | Effects evident at 6 months |
| [90] | 29 | 12 | – | – | 2.5 | 2.4 | NS; for 50% protrusion; same for 75% protrusion |
| [118] | 187 | 60 | 3.5 | 3.0 | 3.0 | 2.80 | Median values; overbite change NS; orthodontic side effect increase with treatment time and more frequent use |
| [119] | 31 | 89 | 2.12 | 0.45 | 2.7 | 0.46 | 70 patients followed-up for 7.4 years; measurements made from models; “unfavorable change” group |
| [119] | 10 | 89 | 2.75 | 2.9 | 4.45 | 3.87 | As above; “no change” group |
| [119] | 29 | 89 | 3.95 | 2.72 | 4.47 | 2.52 | As above; “favorable change” group |
| [127] | 67 | 36 | – | – | – | – | Only changes, but not baseline values in overjet and overbite are given (−0.8 and −0.6, respectively over 3 years); small but significant reductions observed mainly during the first year |
| Summary | |||||||
| 389 | 39 | 4.0 | 2.6 | References [73, 118] were excluded | |||
| 418 | 37 | 3.7 | 2.4 | ||||