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Table 3 Quality assessment

From: Effect of protraction facemask on the temporomandibular joint: a systematic review

Author

Study design

Study type

Definitive grade

Mandall (2010) and Mandall (2012)

Prospective

Randomized controlled trial

A

Kurt (2010)

Prospective

Randomized controlled trial

A

Ngan (1997)

Prospective

Before-after study

B

Franchi (1998) and Baccetti (1998)

Prospective

Controlled trial

B

Gallagher (1998)

Prospective

Cohort study

B

EI (2010)

Prospective

Randomized controlled trial

A

Gong (2014)

Prospective

Before-after study

C

Yao (2001)

Prospective

Before-after study

C

Baccetti (1999)

Prospective

Cohort study

B

Baccetti (2000)

Prospective

Cohort study

B

Chang (2006)

Retrospective

Cohort study

B

Franchi (2014)

Retrospective

Cohort study

B

Lee (2016)

Retrospective

Before-after study

C