Skip to main content
. 2020 Jul 26;2020(7):CD004345. doi: 10.1002/14651858.CD004345.pub3

Comparison 1. Surgical flap type (A versus B).

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1.1 Alveolar osteitis (7 days) 7   Odds Ratio (IV, Random, 95% CI) Subtotals only
1.1.1 Triangular flap (short) versus envelope flap 5 187 Odds Ratio (IV, Random, 95% CI) 0.33 [0.09, 1.23]
1.1.2 Pedicle flap versus envelope flap 1 52 Odds Ratio (IV, Random, 95% CI) 0.08 [0.01, 0.97]
1.1.3 Triangular flap (long) versus envelope flap 1 45 Odds Ratio (IV, Random, 95% CI) 0.37 [0.02, 8.31]
1.2 Wound infection (7 days) 4   Odds Ratio (IV, Fixed, 95% CI) Subtotals only
1.2.1 Triangular flap (long) versus envelope flap 2 65 Odds Ratio (IV, Fixed, 95% CI) 0.29 [0.04, 2.06]
1.2.2 Pedicle flap versus envelope flap 1 52 Odds Ratio (IV, Fixed, 95% CI) 5.30 [0.47, 59.36]
1.2.3 Reverse‐L versus alternative single incision flap 1 33 Odds Ratio (IV, Fixed, 95% CI) 3.18 [0.56, 17.98]
1.3 Permanent altered tongue sensation (> 6 months) 1   Peto Odds Ratio (Peto, Fixed, 95% CI) Subtotals only
1.3.1 Triangular flap (long) versus envelope flap 1 45 Peto Odds Ratio (Peto, Fixed, 95% CI) 4.48 [0.07, 286.49]
1.4 Adverse effects ‐ wound dehiscence (up to 30 days) 2   Risk Ratio (IV, Fixed, 95% CI) Subtotals only
1.4.1 Triangular flap (short) versus envelope flap 1 19 Risk Ratio (IV, Fixed, 95% CI) 1.00 [0.16, 6.38]
1.4.2 Triangular flap (long) versus envelope flap 1 20 Risk Ratio (IV, Fixed, 95% CI) 0.14 [0.02, 1.06]
1.5 Pain present at 24 hours (yes/no) 1   Risk Ratio (M‐H, Fixed, 95% CI) Subtotals only
1.5.1 Triangular flap (long) versus envelope flap 1 45 Risk Ratio (M‐H, Fixed, 95% CI) 1.25 [0.27, 5.70]
1.6 Mean pain at 24 hours (0 to 10 VAS) 7   Mean Difference (IV, Random, 95% CI) Subtotals only
1.6.1 Triangular flap (short) versus envelope flap 4 161 Mean Difference (IV, Random, 95% CI) ‐0.84 [‐1.65, ‐0.03]
1.6.2 Comma‐shaped incision versus modified envelope flap 1 100 Mean Difference (IV, Random, 95% CI) ‐1.18 [‐1.37, ‐0.99]
1.6.3 Reverse‐L flap versus alternative single incision flap 1 33 Mean Difference (IV, Random, 95% CI) ‐0.80 [‐1.41, ‐0.19]
1.6.4 Triangular flap (long) versus envelope flap 1 25 Mean Difference (IV, Random, 95% CI) ‐0.83 [‐2.92, 1.26]
1.7 Swelling present (after 1 week) (yes/no) 1   Risk Ratio (M‐H, Fixed, 95% CI) Subtotals only
1.7.1 Triangular flap (long) versus envelope flap 1 45 Risk Ratio (M‐H, Fixed, 95% CI) 0.25 [0.05, 1.21]
1.8 Mean swelling (after 1 week) 7   Mean Difference (IV, Fixed, 95% CI) Subtotals only
1.8.1 Triangular flap (short) versus envelope flap 2 99 Mean Difference (IV, Fixed, 95% CI) 0.60 [0.25, 0.95]
1.8.2 Pedicle flap versus envelope flap 1 52 Mean Difference (IV, Fixed, 95% CI) 0.21 [‐0.09, 0.51]
1.8.3 Comma‐shaped incision versus modified envelope flap 1 100 Mean Difference (IV, Fixed, 95% CI) ‐2.38 [‐2.81, ‐1.95]
1.8.4 Reverse‐L flap versus alternative single incision flap 1 33 Mean Difference (IV, Fixed, 95% CI) 0.20 [‐0.22, 0.62]
1.8.5 Triangular flap (long) versus envelope flap 2 40 Mean Difference (IV, Fixed, 95% CI) 0.68 [0.18, 1.18]
1.9 Trismus (after 1 week) (yes/no) 1   Risk Ratio (M‐H, Fixed, 95% CI) Subtotals only
1.9.1 Triangular flap (long) versus envelope flap 1 45 Risk Ratio (M‐H, Fixed, 95% CI) 2.00 [0.24, 16.36]
1.10 Maximum mouth opening (after 1 week) (SMD) 2 158 Std. Mean Difference (IV, Fixed, 95% CI) ‐0.67 [‐1.04, ‐0.30]
1.10.1 Triangular flap (short) versus envelope flap 2 158 Std. Mean Difference (IV, Fixed, 95% CI) ‐0.67 [‐1.04, ‐0.30]
1.11 Maximum mouth opening (after 1 week) (MD) 3   Mean Difference (IV, Fixed, 95% CI) Subtotals only
1.11.1 Comma‐shaped incision versus modified envelope flap 1 100 Mean Difference (IV, Fixed, 95% CI) 1.20 [0.07, 2.33]
1.11.2 Triangular flap (long) versus envelope flap 2 65 Mean Difference (IV, Fixed, 95% CI) ‐1.22 [‐2.11, ‐0.33]