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. 2021 Apr 26;2021(4):CD010176. doi: 10.1002/14651858.CD010176.pub3

Comparison 2. Different grafting materials for alveolar ridge preservation.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
2.1 Allograft versus xenograft: changes in width of alveolar ridge (mm) 3 87 Mean Difference (IV, Fixed, 95% CI) ‐0.40 [‐1.13, 0.34]
2.2 Allograft versus xenograft: changes in height of alveolar ridge (mm) 2 60 Mean Difference (IV, Fixed, 95% CI) ‐0.45 [‐1.48, 0.58]
2.3 Allograft versus xenograft: need for additional augmentation prior to implant placement 1 40 Risk Ratio (M‐H, Fixed, 95% CI) 6.36 [0.35, 115.73]
2.4 Alloplast versus xenograft: changes in width of alveolar ridge (mm) 2 55 Mean Difference (IV, Fixed, 95% CI) ‐0.31 [‐0.66, 0.04]
2.5 Alloplast versus xenograft: changes in height of alveolar ridge (mm) 1 25 Mean Difference (IV, Fixed, 95% CI) ‐0.60 [‐1.27, 0.07]
2.6 Alloplast versus xenograft: need for additional augmentation prior to implant placement 2 55 Risk Ratio (IV, Fixed, 95% CI) 1.09 [0.65, 1.83]
2.7 Alloplast versus xenograft: implant failures 1 25 Risk Ratio (M‐H, Fixed, 95% CI) Not estimable
2.8 Alloplast versus xenograft: changes in probing pocket depth at teeth adjacent to the extraction site (mm) 1 25 Mean Difference (IV, Fixed, 95% CI) ‐0.30 [‐0.61, 0.01]
2.9 Alloplast with membrane versus alloplast without membrane: changes in width of alveolar ridge (mm) 1 20 Mean Difference (IV, Fixed, 95% CI) 0.43 [0.18, 0.68]
2.10 Alloplast with membrane versus alloplast without membrane: changes in height of alveolar ridge (mm) 1 20 Mean Difference (IV, Fixed, 95% CI) 0.38 [0.26, 0.50]
2.11 Allograft with P‐15 versus allograft without P‐15: changes in width of alveolar ridge (mm) 1 36 Mean Difference (IV, Fixed, 95% CI) ‐0.87 [‐1.61, ‐0.13]
2.12 Allograft with P‐15 versus allograft without P‐15: changes in height of alveolar ridge (mm) 1 36 Mean Difference (IV, Fixed, 95% CI) ‐0.30 [‐1.06, 0.46]
2.13 Alloplast single particles versus alloplast multiple particles: changes in width of alveolar ridge (mm) 1 30 Mean Difference (IV, Fixed, 95% CI) 0.10 [‐0.97, 1.17]
2.14 Alloplast single particles versus alloplast multiple particles: changes in height of alveolar ridge (mm) 1 30 Mean Difference (IV, Fixed, 95% CI) 0.10 [‐1.22, 1.42]