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Table 2 General characteristics of included studies

From: Efficacy of amniotic membrane with coronally advanced flap in the treatment of gingival recession: an updated systematic review and meta-analysis

Author & Year

Recession

Type

Recession location

No. of

Patients

Smokers

No. of defects (Test/Control)

Age Range

Male/Female

Follow-up

(Months)

Percentage of Root Coverage (%)

Authors conclusion

Test

Control

[20]

Miller’s Class I or

Class II GR

Maxillary anterior teeth region

23

excluded

45

> 18 y

M;18

F;5

3,6

36%

56%

It showed better root coverage when PRF or AM were used in conjunction with CAF as compared to CAF alone.

[21]

Miller’s class I and class II GR

Maxillary anterior teeth region

45

excluded

45

21–53 y

M:36

F:9

6

NR

NR

CAF used with AM showed favorable results in the treatment of Miller’s class I and II GR.

[22]

Miller’s Class I GR

Maxillary and nine mandibular defects

10

excluded

20

NR

M:10

6,18

NR

NR

AM demonstrated a higher percentage of root coverage than PRF when both were combined with CAF.

[16]

Single bilateral

Miller’s Class I or Class II GR

NR

12

excluded

24

28-40y

NR

1,3,6

22%

28%

CM showed more root coverage with a reduction in recession depth while AM showed more CAL gain.

[23]

Miller’s Class I and II recession defects

Maxillary anterior and premolars

30

excluded

30

20–50

NR

3

NR

NR

CAF combined with AM and DFDBA showed better results compared to CAF alone in Miller’s Class I and II GRs.

[24]

buccal/labial vertical GR defects more than or equal to 2 mm.

NR

9

Excluded

22

30–55 y

M:8

F:1

3,6

NR

NR

Both FGM and AM showed the same regenerative potential.

[25]

Miller’s class I and class II

NR

15

excluded

30

NR

NR

1, 3,6

NR

NR

CAF alone showed better results regarding recession reduction in Miller’s class I & II GRs than CAF with AM.

[15]

Bilateral Miller class I GR

Maxillary

and mandibular canines

15

Excluded

30

21–52 y

M:5

F:10

6

76.47%

56.94%

CAF with both PRF and AM can be successfully used to treat class I GR with AM gives better outcomes.

[26]

bilateral Miller’s class I and II GR

Maxillary and mandibular anterior and premolar regions

15

excluded

60

23–55 y

M:11

F:4

3,6

NR

NR

AM with the CAF showed reliable root coverage with favorable healing outcomes as compared to CAF alone.

[14]

Miller’s class I and II GR

Maxillary and mandibular anterior and premolar regions

22

excluded

71

> 18 y

NR

3,6

67%

54%

AM may substitute CTG in root coverage procedures and RD reduction.

[27]

Miller class I and II

NR

10

excluded

20

20–50 y

NR

6

NR

NR

Both AM and CM can be safely used in the treatment of GR defects and to augment the gingival phenotype.

[28]

Bilateral Miller’s class I GR defect

NR

10

excluded

20

18–40 y

M:5

F:5

3,6

NR

NR

CAF with AM can be used for treating Miller’s Class I GR defects.

[29]

Miller’s class I and II GR

NR

30

Excluded

30

18–55 y

M:15

F:15

3,6

NR

NR

Both AM and PRF were equally effective in terms of recession coverage and increased WKG.

[30]

Isolated bilateral Miller’s class

I GR defects

Maxillary and mandibular anterior and premolar regions

51

Excluded

102

18–40 y

NR

6

85%

81%

CAF with AM proved to be fruitful in comparison with CAF alone.

[31]

Miller class I and II buccal recessions

Maxillary and mandibular anterior and premolar regions

11

excluded

30

34 ± 12 y

NR

1,3,6

63.18%

75.54%

AM with CAF may be relatively comparable with gold standard SCTG with CAF for the treatment of Miller class I and II GR.

[32]

Single Miller’s Class I or Class II GR

NR

24

Excluded

24

20–60 y

NR

3,6

77%

62%

AM showed more root coverage than PRF.

[33]

Isolated bilateral

Miller’s Class I or Class II GR

NR

12

Excluded

24

18–40 y

F:7

M:5

3,6

73.31%

59.03%

Collagen membrane and AM are equally efficacious.

[34]

Single Miller’s Class I or Class II GR

Maxillary anterior, premolar, and molar regions

24

Excluded

24

22–41 y

F:4

M:20

3,6

NR

NR

AM with a microsurgical approach showed better root coverage outcomes and stable results at the end of the study period.

[17]

Single bilateral Miller’s Class I or Class II GR

NR

9

NR

18

NR

NR

3,6

NR

NR

The combination of CAF with AM provided additional outcomes in the treatment of GR.

[35]

bilaterally localized Miller’s class I or II GR

Maxillary and mandibular anterior region

5

excluded

10

30–40 y

NR

3

NR

NR

AM with CAF did not influence the clinical outcome of the root coverage procedure.

[18]

Single Miller’s Class I GR

Maxillary and mandibular

sites

16

Excluded

20

20–45 y

M:10

6,18

NR

NR

AM showed better root coverage as compared to PRF.

[36]

Single Miller’s Class I or Class II GR

Maxillary anterior and premolars region

30

Excluded

30

18–55 y

NR

3,6,9

At 6 months

67.6%

At 9 months

64.27%

At 6 months

65.27%

At 9months

57.0%

AM was more effective in terms of increasing WKT.