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Table 1 Characteristics of included randomized trials pertaining to setting, patients, and intervention

From: Are there benefits from using bone-borne maxillary expansion instead of tooth-borne maxillary expansion? A systematic review with meta-analysis

Study Design; Setting; Country$ Patients (M/F); age Intervention; duration# Activation protocol
Bazargani [33] RCT; Clinic; SWE EG1: 19 (11/8); 9.7 EG2: 21 (10/11); 10.2 EG1: TB RME; NR EG2: Hybr. RME; NR 2×/day until upper palatal molar cusps touch lower molar buccal cusps
Canan [31] RCT; Uni; TUR EG1: 16 (8/8); 12.6 EG2: 16 (7/9); 12.9 EG3: 15 (7/8); 13.4 EG1: TB RME; 13.3 days EG2: BB RME; 12.4 days EG3: Hybr. RME; 14.1 days 2×/day
Celenk-Koca [30] RCT; Pract; NLD EG1: 20 (8/12); 13.8 EG2: 20 (7/13); 13.8 EG1: TB RME; 19.7 days EG2: BB RME; 19.7 days 2×/day until upper palatal molar cusps touch lower molar buccal cusps
Feldmann [37] RCT; Clinic; SWE EG1: 25 (12/13); 9.7 EG2: 25 (12/13); 10.0 EG1: TB RME; NR EG2: Hybr. RME; NR 2×/day until upper palatal molar cusps touch lower molar buccal cusps
Gunyuz Toklu [18] RCT; Uni; TUR EG1: 13 (5/8); 14.3 EG2: 12 (6/6); 13.8 EG1: TB RME; 19.2 days EG2: Hybr. RME; 20.2 days 2×/day until upper palatal molar cusps touch lower molar buccal cusps
Lagravère 2009 [45]collated RCT; Uni; CAN EG1: 20 (5/15); 14.1 EG2: 21 (8/13); 14.2 CG: 21 (6/15); 12.9 EG1: TB RME; NR EG2: BB RME; NR CG: observation 2×/day for DME (or 1×/2 days for the SME) until overcorrection
  1. BB bone-borne, CG control group without expansion, EG experimental group with expansion, F female, Hybr. hybrid (tooth-bone-borne), RCT randomized clinical trial, HME hybrid (skeletally/dentally) anchored maxillary expansion, M male, NR not reported, Pract practice, RME rapid maxillary expansion, SME skeletally anchored maxillary expansion, TB tooth-borne, Uni university
  2. #Duration of active transverse expansion in weeks
  3. $Countries are given with their ISO-3 code
  4. Including the publications Lagravère 2010 [46], Lagravère 2013 [47], Kabalan 2015 [48], Stepanko 2016 [49] and the dissertations Lagravère 2009 [45], Forst 2015 [36]