Author/ Year |
Measurements |
Follow-up time |
Overcorrection |
Experimental group x Control group (P value) |
Relapse measurements after follow-up |
Crossbite corrected after follow-up |
Conclusion |
Cozzaniet al8 (20078. Cozzani M, Guiducci A, Mirenghi S, Mutinelli S, Siciliani G. Arch width changes with a rapid maxillary expansion appliance anchored to the primary teeth. Angle Orthod . 2007 Mar;77(2):296-302.) |
» Maxillary arch width: » PFM- center of the fossa » PSM-center of the fossa » IC-cusp tip » DC |
minimum 1 y after appliance removal 2.4 ± 1.7y |
yes - primary teeth no - permanent first molar |
PFM: ≤0.01 PSM: ≤0.01 IC: ≤0.05 |
PFM = 0.9% PSM = 6.0% IC = 5.5% |
yes |
Relapse: PFM < PSM Overexpand PSM PFM was stable for 2y 4m after treatment |
Lagravere et al17 (2010) |
» PC- center of pulp chamber in molars and tip of premolars buccal pulp horn » MBA-mesiobuccal root apex of molars » BA-buccal root apex of premolars » AIB-outer cortex of alveolar bone at the vertical level of the root apex » mm » CBCT |
Before fixed bonding (12m) long-term post-relapse |
yes |
all groups P<.001 |
PC16-PC26 = 27% PC14-PC24 = 39% MBA16-MBA26= 28% BA14-BA24 = 18% AIB16-AIB26 = 51% AIB14-AIB24 = 20% |
yes |
aprox 4mm (70%) expansion - at T4 at molars Dental expansion> skeletal expansion Midpalatal suture separation on TG. No significant changes at the level of the pterigoid plates TG=CG |
Godoy et al4 (20114. Godoy F, Godoy-Bezerra J, Rosenblatt A. Treatment of posterior crossbite comparing 2 appliances: a community-based trial. Am J Orthod Dentofacial Orthop . 2011 Jan;139(1):e45-52.) |
Maxillary arch width: PSM-center of the fossa IC- cusp tip DC |
6m after appliance removal |
no |
IMD: P<0.001 (QDH=EP; QDH≠ CG; EP≠ CG) ICD: P= 0.354 |
PSF QDH= 2.2% EP = 1.7% IC QDH = 0.3% EP = 0% |
yes 9.1% of the each sample showed relapse |
QDH=EP for correct posterior crossbite QDH> breakage EP> lost appliances QDH< treatment time Treatment may be performed in 1y for posterior CB correction and 6m for retention |
Petrén et al21 (201121. Petrén S, Bjerklin K, Bondemark L. Stability of unilateral posterior crossbite correction in the mixed dentition: a randomized clinical trial with a 3-year follow-up. Am J Orthod Dentofacial Orthop . 2011 Jan;139(1):e73-81.) |
Maxillary arch width: PSM-gingival margin (GM) PSM-mesiobuccal cusp tip (MCT) IC-gingival margin (GM) IC-buccal cusp tip (BCT) DC |
QDH and EP group 4y after correction |
no |
IMD (MCT): P=NR (CG>QDH,EP) ICD (BCT): P=NR (CG>QDH) |
PSM QDH = 1.6% EP = 5.6% IC (GM) QDH = 4.9% EP = 5.6% IC (BCT) QDH = 1.2% EP = 0.6% |
yes |
The long-term stability of crossbite correction in the mixed dentition is favorable. Results: QDH=EP |
Primozic et al22 (201322. Primožič J, Richmond S, Kau CH, Zhurov A, Ovsenik M. Three-dimensional evaluation of early crossbite correction: a longitudinal study. Eur J Orthod. 2013 Feb;35(1):7-13.) |
Palatal surface area (mm²) 3D digital DC |
12 months later 18 months later 30 months later |
yes |
Surface(mm²): P= NR NS (TG=CG) |
Palatal surface area (TG) = - 0.5% |
26.7% of the TG showed relapse |
Treatment of unilateral CB in the deciduous dentition also create conditions for normal occlusal and craniofacial development. Improves facial symmetry and increase palatal area and volume |
Mutinelli et al16 (201516. Mutinelli S, Cozzani M. Rapid maxillary expansion in early-mixed dentition: effectiveness of increasing arch dimension with anchorage on deciduous teeth. Eur J Paediatr Dent. 2015 June;16(2):115-22.) |
Maxillary arch width: PSM and IC (mm); 3D digital DC |
In the permanent dentition 5.3 ± 0.8y |
yes - primary teeth no - permanent first molar |
IC P= 0.02 PSM P= 0.001 |
PSM = 1% IC = 5.1% |
yes |
In patients in canine Class II, early treatment of lateral CB with a modified Haas expander anchored to deciduous teeth is effective and presented stable results until the stage of permanent dentition |