title: Growth factors and beta-tricalcium phosphate in the treatment of periodontal intraosseous defects: A systematic review and meta-analysis of randomised controlled trials.
abstract: OBJECTIVE
  To evaluate the effectiveness at different points in time, of recombinant human platelet-derived growth factor-BB (rhPDGF-BB) coated onto a beta-tricalcium phosphate (β-TCP) carrier compared to β-TCP alone, or to recombinant human growth/differentiation factor-5 (rhGDF-5) adsorbed onto a β-TCP scaffold in intraosseous periodontal defects.
  
  
  METHODS
  A digital search for randomised controlled trials (RCTs) was conducted on MEDLINE/PubMed. The quality of reporting and the risk of bias of the included RCTs were assessed using the CONSORT guidelines and the Cochrane risk of bias tool. The difference between the means of the outcomes at baseline and at follow-up for each group was tested using the Student's t-test for paired samples. The difference between the means of the outcome changes at follow-up between groups was analysed using the Student's t-test for two independent samples. Prior to each analysis a test of homogeneity of variances (Ansari-Bradley) was performed.
  
  
  RESULTS
  From 11 articles assessed for eligibility, 5 RCTs were included in this review. The risk of bias was considered to be low in 2 articles, medium in 1 study and high in 2 studies.
  
  
  CONCLUSIONS
  In the treatment of periodontal intraosseous defects the application of rhPDGF-BB/β-TCP improved all outcomes when compared to β-TCP at 6 months follow-up. Either rhPDGF-BB/β-TCP or rhGDF-5/β-TCP seemed to provide similar results in terms of probing pocket depth (PPD) reduction and clinical attachment level (CAL) gain. The application of rhGDF-5/β-TCP resulted in a more pronounced reduction in gingival recession (GR) depth at 6 months follow-up compared to rhPDGF-BB/β-TCP.
authors.affiliation: Department of Dental Prostheses Technology and Dental Materials, Dental Medicine Faculty, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania. Electronic address: claudiu_m_calin@yahoo.com.
authors.forename: Claudiu
authors.initials: C
authors.lastname: Cãlin
authors.affiliation: Department of Dental Prostheses Technology and Dental Materials, Dental Medicine Faculty, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.
authors.forename: Ion
authors.initials: I
authors.lastname: Pãtraşcu
mesh_terms: D016301:Alveolar Bone Loss / Q000188:drug therapy; D002130:Calcium Phosphates / Q000494:pharmacology*; D005889:Gingival Recession / Q000188:drug therapy*; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000494:pharmacology*; D017622:Periodontal Attachment Loss / Q000188:drug therapy*; D016032:Randomized Controlled Trials as Topic
chemical_list: D002130:Calcium Phosphates; D036341:Intercellular Signaling Peptides and Proteins; C485817:beta-tricalcium phosphate
keywords: Beta-tricalcium phosphate; Meta-analysis; Periodontal pocket; Systematic review; rhGDF; rhPDGF