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Table 1 Summary of the excluded studies and the reason for their exclusion

From: The effect of platelet–rich plasma on clinical outcomes of the surgical treatment of periodontal intrabony defects: A systematic review and meta–analysis

Reference

Reason for exclusion

Camargo et al. 2005 [9]

Inappropriate control group (use of OFD instead of GTR + BM)

Rodrigues et al. 2011 [21]

Inappropriate control group (use of PRP instead of ABM)

Yilmaz et al. 2011 [22]

Inappropriate control group (use of PPP + BDX instead of BDX)

Yilmaz et al. 2010 [23]

Inappropriate control group (use of PRP + BDX instead of BDX)

Pradeep et al. 2009 [24]

Inappropriate control group (use of PRP instead of ABM/P-15)

Yamamiya et al. 2008 [25]

Inappropriate control group (use of HA + PRP instead of HA + HCP)

Ilgenli et al. 2007 [26]

Inappropriate control group (use of PRP instead of DFDBA)

Camargo et al. 2002 [27]

Inappropriate control group (use of GTR instead of GTR + BM)

Pradeep et al. 2012 [28]

Inappropriate control group (use of OFD instead of bone graft)

Yilmaz et al. 2009 [29]

Not a randomized controlled clinical trial

Camargo et al. 2009 [30]

Not a randomized controlled clinical trial

Czuryszkiewicz-Cyrana et al. 2006 [31]

Not a randomized controlled clinical trial

Döri et al. 2008 [32]

Used a biologic material (EMD)

Döri et al. 2013 [33]

Used a biologic material (EMD)

  1. ABM anorganic bone mineral, BDX bovine-derived xenograft, P-15 peptide-15, HCP human cultured periosteum, OFD open flap debridement, HA hydroxyapatite, DFDBA demineralized freeze-dried bone allograft; BM bovine-derived porous bone mineral, EMD enamel matrix derivative