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Table 2 35 selected meta-analyses (15 with binary outcomes and 19 with continuous outcomes)

From: Comparison of intervention effects in split-mouth and parallel-arm randomized controlled trials: a meta-epidemiological study

Meta-analysis

Experimental intervention

Comparator

Binary outcome

Continuous outcome

1

Platform-switched implant restoration

Platform match

-

Marginal bone loss

2

Scaling and root planning + antimicrobial photodynamic therapy

Scaling and root planning

-

Clinical attachment level gain

3.

Low-level laser energy irradiation

Nonactive comparator

-

Trismus

4.a.

Coronally advanced flap + connective tissue graft

Coronally advanced flap

Complete root coverage

Gingival recession change

4.b.

Coronally advanced flap + enamel matrix derivative

Coronally advanced flap

Complete root coverage

Gingival recession change

4.c.

Coronally advanced flap + acellular dermal matrix

Coronally advanced flap

Complete root coverage

Gingival recession change

4.d.

Coronally advanced flap + barrier membranes

Coronally advanced flap + connective tissue graft

Complete root coverage

Gingival recession change

4.e

Coronally advanced flap + acellular dermal matrix

Coronally advanced flap + connective tissue graft

Complete root coverage

Gingival recession change

5.

Secondary closure technique

Primary closure technique

Infectious complication

Pain

6.a

Guided tissue regeneration (rm) + bone substitutes

Subepithelial connective tissue grafts

-

Gingival recession change

6.b

Guided tissue regeneration (rm) + bone substitutes

Guided tissue regeneration (rm)

Complete root coverage

Gingival recession change

7.

Platelet-rich plasma

Control

-

Clinical attachment level gain

8.a

Loading of osteointegreated implants within 1 week

Loading of osteointegreated implants after 2 months

Prosthesis failure

Marginal bone level changes

8.b

Loading of osteointegreated implants within 1 week

Loading of osteointegreated implants between 1 week and 2 months

Prosthesis failure

Marginal bone level changes

9.

Emdogain

Control

Probing attachment level gain < 2 mm

-

10.

Procedure with flap elevation

Flapless implant insertion

Implant failure

-

11.

1-stage bonding (self-etch)

2-stage bonding (acid-etch)

Bracket failure

-

12.

Dental floss

Interdental brushes

-

Interproximal gingival bleeding

13.

Antibiotic - Pre-operative prophylaxis

Placebo

-

Pain

14.

Glass-ionomer cement

Amalgam

Caries

-

15.a

Fluoride-containing resin-based sealant

Light-cured resin-based sealant

Complete retention

-

15.b

Rubber dam

Cotton rolls

Complete retention

-

16

Guided tissue regeneration

Control

-

Clinical attachment level gain

17.

Scaling and root planning + Diode laser

Scaling and root planning

-

Probing depth reduction

18.

Supplemental perioperative steroids

Placebo

-

Systolic blood pressure

  1. rm: with resorbable membranes.