| 1 Stability ‐ Little's Irregularity Index ‐ upper labial segment ‐ 1 year |
3 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 1.1 Night wear Hawley 1 year vs. 24/7 for 6 months + night wear 6 months Hawley |
1 |
52 |
Mean Difference (IV, Fixed, 95% CI) |
0.0 [‐0.41, 0.41] |
| 1.2 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week then night wear |
1 |
310 |
Mean Difference (IV, Fixed, 95% CI) |
0.25 [0.08, 0.42] |
| 1.3 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
0.03 [‐0.39, 0.45] |
| 2 Stability ‐ Little's Irregularity Index ‐ lower labial segment ‐ 1 year |
4 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 2.1 Night wear Hawley 1 year vs. 24/7 for 6 months + night wear 6 months |
1 |
52 |
Mean Difference (IV, Fixed, 95% CI) |
0.20 [‐0.28, 0.68] |
| 2.2 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week then night wear |
1 |
310 |
Mean Difference (IV, Fixed, 95% CI) |
0.42 [0.23, 0.61] |
| 2.3 Upper and lower (mean) Begg full time vs. upper and lower (mean) thermoplastic retainers full time |
1 |
224 |
Mean Difference (IV, Fixed, 95% CI) |
0.25 [0.19, 0.31] |
| 2.4 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
0.02 [‐0.34, 0.38] |
| 3 Stability ‐ crowding upper labial segment ‐ 1 year |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Totals not selected |
| 3.1 Night wear Hawley 1 year vs. 24/7 for 6 months + night wear 6 months |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
0.0 [0.0, 0.0] |
| 4 Stability ‐ crowding lower labial segment ‐ 1 year |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Totals not selected |
| 4.1 Night wear Hawley 1 year vs. 24/7 for 6 months + night wear 6 months |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
0.0 [0.0, 0.0] |
| 5 Stability: lower intercanine width |
2 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 5.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 month |
1 |
310 |
Mean Difference (IV, Fixed, 95% CI) |
0.08 [0.01, 0.15] |
| 5.2 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
0.05 [‐0.22, 0.32] |
| 6 Stability: lower intermolar width |
2 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 6.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 month |
1 |
310 |
Mean Difference (IV, Fixed, 95% CI) |
0.08 [‐0.01, 0.17] |
| 6.2 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
56 |
Mean Difference (IV, Fixed, 95% CI) |
‐0.11 [‐0.59, 0.38] |
| 7 Stability: upper intercanine width |
2 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 7.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 month |
1 |
310 |
Mean Difference (IV, Fixed, 95% CI) |
0.05 [‐0.04, 0.14] |
| 7.2 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
‐0.00 [‐0.31, 0.30] |
| 8 Stability: upper intermolar width |
2 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 8.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 month |
1 |
310 |
Mean Difference (IV, Fixed, 95% CI) |
‐0.02 [‐0.12, 0.08] |
| 8.2 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
0.12 [‐0.67, 0.92] |
| 9 Stability: overjet |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 9.1 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
0.06 [‐0.35, 0.48] |
| 10 Stability: overbite |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 10.1 Part‐time 8/7 thermoplastic vs. full‐time 24/7 thermoplastic |
1 |
57 |
Mean Difference (IV, Fixed, 95% CI) |
0.34 [‐0.01, 0.69] |
| 11 Stability: settling with increased posterior contacts |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 11.1 Modified thermoplastic retainer vs. full coverage thermoplastic retainer (both 6/12 full‐time) |
1 |
36 |
Mean Difference (IV, Fixed, 95% CI) |
‐0.34 [‐1.40, 0.72] |
| 11.2 Modified thermoplastic retainer vs. full coverage thermoplastic retainer (both 6/12 full‐time then 3/12 part‐time) |
1 |
36 |
Mean Difference (IV, Fixed, 95% CI) |
0.95 [0.05, 1.85] |
| 12 Stability: settling with increased anterior contacts |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 12.1 Modified thermoplastic retainer vs. full coverage thermoplastic retainer (both 6/12 full‐time) |
1 |
36 |
Mean Difference (IV, Fixed, 95% CI) |
‐1.89 [‐2.32, ‐1.46] |
| 12.2 Modified thermoplastic retainer vs. full coverage thermoplastic retainer (both 6/12 full‐time then 3/12 nights only) |
1 |
36 |
Mean Difference (IV, Fixed, 95% CI) |
‐1.5 [‐1.94, ‐1.06] |
| 13 Stability: maintaining corrected rotations in the upper |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 13.1 Hawley full‐time for 3/12 then nights only vs. thermoplastic part‐time |
1 |
75 |
Risk Ratio (M‐H, Fixed, 95% CI) |
4.88 [1.13, 21.07] |
| 14 Stability: maintaining quality of finish (PAR) |
1 |
|
Mean Difference (IV, Fixed, 95% CI) |
Subtotals only |
| 15 Survival of retainers: how many broke in total |
1 |
346 |
Risk Ratio (M‐H, Fixed, 95% CI) |
2.96 [1.58, 5.55] |
| 15.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week then night wear |
1 |
346 |
Risk Ratio (M‐H, Fixed, 95% CI) |
2.96 [1.58, 5.55] |
| 16 Survival of retainers: how many were lost in total |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 16.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week then night wear |
1 |
346 |
Risk Ratio (M‐H, Fixed, 95% CI) |
1.20 [0.56, 2.56] |
| 17 Survival of retainers: upper |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 17.1 Hawley 24/7 for 1 year vs. vacuum formed 24/7 for 1 year |
1 |
111 |
Risk Ratio (M‐H, Fixed, 95% CI) |
0.87 [0.63, 1.19] |
| 18 Survival of retainers: lower |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 18.1 Hawley 24/7 for 1 year vs. thermoplastic 24/7 for 1 year |
1 |
111 |
Risk Ratio (M‐H, Fixed, 95% CI) |
0.60 [0.43, 0.83] |
| 19 Patient satisfaction: able to wear retainer as instructed? |
1 |
347 |
Risk Ratio (M‐H, Fixed, 95% CI) |
0.89 [0.83, 0.96] |
| 19.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week then night wear |
1 |
347 |
Risk Ratio (M‐H, Fixed, 95% CI) |
0.89 [0.83, 0.96] |
| 20 Patient satisfaction: able to wear retainers away from home? |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 20.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week |
1 |
344 |
Risk Ratio (M‐H, Fixed, 95% CI) |
0.92 [0.81, 1.06] |
| 21 Patient satisfaction: embarrassed to wear retainer? |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 21.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week |
1 |
348 |
Risk Ratio (M‐H, Fixed, 95% CI) |
2.42 [1.30, 4.49] |
| 22 Patient satisfaction: amount of discomfort ‐ never or only on occasion |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 22.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week then night wear |
1 |
349 |
Risk Ratio (M‐H, Fixed, 95% CI) |
0.96 [0.89, 1.03] |
| 23 Patient satisfaction: worse or much worse than wearing fixed appliances? |
1 |
|
Risk Ratio (M‐H, Fixed, 95% CI) |
Subtotals only |
| 23.1 Hawley 24/7 for 3 months then 12/7 vs. thermoplastic 12/7 for 1 week |
1 |
349 |
Risk Ratio (M‐H, Fixed, 95% CI) |
9.37 [3.80, 23.10] |
