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Table 4 Risk of bias considering parameters reported in the eligible studies

From: Comparative evaluation of the vertical fracture resistance of endodontically treated roots filled with Gutta-percha and Resilon: a meta-analysis of in vitro studies

Study Teeth randomization Teeth free of caries or resorption Standardization of root dimensions Sample size calculation Endodontic treatment performed by a single operator Materials used according to the manufacturer’s instructions Blinding of the examiner Appropriate of statistical analyses Risk of bias
Lertchirakarn et al. [27] Y Y N N Y Y N Y Medium
Hegde et al. [11] Y Y Y N Y Y N Y Low
Topçuoğlu et al. [12] Y Y Y N Y Y N Y Low
Baba et al. [13] Y N N N Y Y N Y Medium
Kumar et al. [15] Y N Y N Y Y N Y Medium
Jainaen et al. [14] Y Y N N Y Y N Y Medium
Monteiro et al. [16] Y Y Y N Y Y Y Y Low
Elmakki et al. [23] Y Y Y N Y Y Y Y Low
Hammad et al. [24] Y Y N N Y Y N Y Medium
Nagpal et al. [28] Y N N N Y Y N Y Medium
Langalia et al. [26] Y Y Y N Y Y N Y Low
Khan et al. [25] Y Y Y N Y Y N Y Low
Dibaji et al. [22] Y Y Y N Y Y N Y Low
Sandikci et al. [29] Y Y Y N Y Y N Y Low
  1. Y (Yes) indicates that the specific parameter was reported in the article
  2. N (No) indicates that the specific parameter was not possible to be found in the article